1
|
Choudhury TR, Riad S, Uddin FJ, Maksud MA, Alam MA, Chowdhury AMS, Mubin AN, Islam ARMT, Malafaia G. Microplastics in multi-environmental compartments: Research advances, media, and global management scenarios. JOURNAL OF CONTAMINANT HYDROLOGY 2024; 265:104379. [PMID: 38851130 DOI: 10.1016/j.jconhyd.2024.104379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 05/06/2024] [Accepted: 06/02/2024] [Indexed: 06/10/2024]
Abstract
During the past decades, microplastics (MPs) have become an emerging concern due to their persistence and potential environmental threat. MP pollution has become so drastic that it has been found in the human food chain, breast milk, polar regions, and even the Himalayan basin, lake, etc. Inflammation, pulmonary hypertension, vascular occlusions, increased coagulability and blood cell cytotoxicity, disruption of immune function, neurotoxicity, and neurodegenerative diseases can all be brought on by severe microplastic exposure. Although many MPs studies have been performed on single environmental compartments, MPs in multi-environmental compartments have yet to be explored fully. This review aims to summarize the muti-environmental media, detection tools, and global management scenarios of MPs. The study revealed that MPs could significantly alter C flow through the soil-plant system, the structure and metabolic status of the microbial community, soil pH value, biomass of plant shoots and roots, chlorophyll, leaf C and N contents, and root N contents. This review reveals that MPs may negatively affect many C-dependent soil functions. Different methods have been developed to detect the MPs from these various environmental sources, including microscopic observation, density separation, Raman, and FT-IR analysis. Several articles have focused on MPs in individual environmental sources with a developed evaluation technique. This review revealed the extensive impacts of MPs on soil-plant systems, microbial communities, and soil functions, especially on water, suggesting possible disturbances to vital ecological processes. Furthermore, the broad range of detection methods explored emphasizes the significance of reliable analytical techniques in precisely evaluating levels of MP contamination in various environmental media. This paper critically discusses MPs' sources, occurrences, and global management scenarios in all possible environmental media and ecological health impacts. Future research opportunities and required sustainable strategies have also been suggested from Bangladesh and international perspectives based on challenges faced due to MP's pollution.
Collapse
Affiliation(s)
- Tasrina Rabia Choudhury
- Analytical Chemistry Laboratory, Chemistry Division, Atomic Energy Center Dhaka, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh.
| | - Syed Riad
- Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka, Bangladesh
| | - Foyez Jalal Uddin
- Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka, Bangladesh
| | - M A Maksud
- Analytical Chemistry Laboratory, Chemistry Division, Atomic Energy Center Dhaka, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh
| | - M Abbas Alam
- Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka, Bangladesh; Bangladesh Accreditation Board, Dhaka 1000, Bangladesh
| | | | - Al-Nure Mubin
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh
| | - Abu Reza Md Towfiqul Islam
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh; Department of Development Studies, Daffodil International University, Dhaka 1216, Bangladesh.
| | - Guilherme Malafaia
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí, GO, Brazil; Post-Graduation Program in Ecology, Conservation, and Biodiversity, Federal University of Uberlândia, Uberlândia, MG, Brazil; Post-Graduation Program in Biotechnology and Biodiversity, Federal University of Goiás, Goiânia, GO, Brazil.
| |
Collapse
|
2
|
Martín-Pozo L, Mejías C, Santos JL, Martín J, Aparicio I, Alonso E. Influence of microplastic contamination on the dissipation of endocrine disrupting chemicals in soil environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123919. [PMID: 38582188 DOI: 10.1016/j.envpol.2024.123919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/19/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
Microplastic (MP) contamination is in the spotlight today, yet knowledge of their interaction with other organic contaminants in the soil environment is limited. Concerns extend to endocrine disrupting chemicals (EDCs), known for their potential to interfere with the hormonal systems of organisms and for their persistence and widespread presence in the environment. In this study, the most frequently occurring EDCs were monitored both in alluvial soil and in soil contaminated with different MPs commonly found in soil media, polyethylene, polyamide, and polystyrene. Bisphenol A and parabens were the most rapidly dissipating compounds, followed by triclosan and triclocarban, with the latter showing poor degradation. Per- and polyfluoroalkyl substances (PFAS) showed high persistence as concentrations remained nearly constant throughout the experiment. Although they fitted well with first-order dissipation kinetics, most showed biphasic behavior. The co-occurrence of MPs in the soil influenced the kinetic behavior in most cases although the differences were not very marked. MPs could impact sorption-desorption processes, affecting contaminant mobility and bioavailability to organisms in soil. These findings strengthen evidence for the influence of MPs on the behavior of soil contaminants such as EDCs, not only as vectors or sources of contaminants but by affecting dissipation kinetics.
Collapse
Affiliation(s)
- Laura Martín-Pozo
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África, 7, E-41011, Seville, Spain.
| | - Carmen Mejías
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África, 7, E-41011, Seville, Spain
| | - Juan Luis Santos
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África, 7, E-41011, Seville, Spain
| | - Julia Martín
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África, 7, E-41011, Seville, Spain
| | - Irene Aparicio
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África, 7, E-41011, Seville, Spain
| | - Esteban Alonso
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África, 7, E-41011, Seville, Spain
| |
Collapse
|
3
|
Xiao N, Wang Y, Guo Z, Shao T, Dong Z, Xing B. Tire plastic and road-wear particles on Yujing Expressway in the restoration area of Mu Us Sandy Land: Occurrence characteristics and ecological risk screening. JOURNAL OF HAZARDOUS MATERIALS 2024; 468:133860. [PMID: 38402682 DOI: 10.1016/j.jhazmat.2024.133860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 02/20/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
Tire plastic and road-wear particles (TPR-WP) are a current research priority as one of the main environmental sources of microplastics. We selected a unique land use type - desert restoration area, collected soil and dust samples from the Yujing Expressway and its service areas, and analyzed TPR-WP abundance, type, size and morphology by laser direct infrared (LDIR). The abundance of TPR-WP in expressway dust (14,446.87 ± 10,234.24 n/kg) was higher than that in soil (7500 ± 3253.64 n/kg). Random forest model showed that the source of TPR-WP was highly correlated with economic factors and natural climate. Overall, the proportion of small and medium-sized TPR-WP in dust was higher than soil, more than half of the TPR-WP in dust were in 20 - 50 µm range. The proportion of small particle size TPR-WP increased with the rise of elevation. The pollution load index suggested that the survey region was generally at level I risk zone, while the ecological risk index indicated that the pollution level of expressway was III and IV, and the service area was IV. In general, the study was of great significance for clarifying the distribution and risk of TPR-WP in soil and dust of expressways and service areas.
Collapse
Affiliation(s)
- Na Xiao
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Yanhua Wang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China.
| | - Ziyi Guo
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Tianjie Shao
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Zhibao Dong
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
| |
Collapse
|
4
|
Zhang F, Yang X, Zhang Z. Effects of soil properties and land use patterns on the distribution of microplastics: A case study in southwest China. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 356:120598. [PMID: 38490007 DOI: 10.1016/j.jenvman.2024.120598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/09/2024] [Accepted: 03/10/2024] [Indexed: 03/17/2024]
Abstract
Microplastic pollution in the soil environment is of great concern. However, the current research on microplastics (MPs) in Southwest China mainly focuses on their distribution characteristics and sources in soil, making the understanding of the soil properties and land use patterns influencing soil MPs insufficient. In this study, the abundance and distribution characteristics of MPs in the soil of different land use patterns in Guizhou Province were determined. The results revealed that the average abundance of MPs in soils was 2936 items/kg, ranging from 780 to 9420 items/kg. The MPs were mainly small particle size (0-0.5 mm), granular, and black, accounting for 87.5%, 36.6%, and 82.2%, respectively. The most common polymer types of MPs were polypropylene, polyethylene terephthalate, and polyethylene, which accounted for 20.4%, 16.8%, and 16.4%, respectively. As soil bulk density increased, microplastic abundance and small particle size decreased. Soil microplastic abundance slightly decreased with increasing soil porosity. The abundance of MPs increased with the increase in soil pH, but no significant correlation was observed between soil organic matter content and microplastic abundance. pH was the major factor that affected the microplastic distribution, which accounted for 32.5%. This study provides insight into the distribution and influencing factors of soil MPs and also provides a theoretical basis for subsequent research on soil microplastic pollution.
Collapse
Affiliation(s)
- Fudong Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China
| | - Xiuyuan Yang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China
| | - Zhenming Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang, 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, China.
| |
Collapse
|
5
|
Liu Y, Zhao S, Wang D, Wang S, Ding X, Han K, Wang R, Kou Y, Zhou G, Shen W. Environmental fate of microplastics in alpine and canyon-type river-cascade reservoir systems: Large-scale investigation of the Yalong River in the eastern Qinghai-Tibet Plateau. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170300. [PMID: 38272090 DOI: 10.1016/j.scitotenv.2024.170300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/13/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
Reservoirs are regarded as potential collection sites for microplastics (MPs), and ample water resources in plateau regions provide favorable natural conditions for hydroelectric power generation. However, research on the impact of cascade reservoir construction in the plateau region on the fate of MPs within the watershed is limited. In this study, the Yalong River, an alpine canyon river in the eastern Qinghai-Tibet Plateau, was selected as the research area. This study explored the distribution of MPs at various depths in water, sediment, and riverbank soil as well as the formation of "MP communities" within the river-cascade reservoir system. Furthermore, the effects of dam construction on MPs' migration in different environments were analyzed. The results revealed that the abundance of MPs in the water and sediment within the cascade reservoir area (CRA) was significantly higher than that in the river area (RA) (P < 0.001). Additionally, the trend of increasing MPs in water with decreasing altitude was notably slower in CRA. Regarding shape, the proportion of fibers in the water within the CRA was significantly lower than that in the RA, with a smaller vertical migration rate in the water than in the sediment. The proportion of MPs < 500 μm in the water within the CRA was significantly higher than that in the RA. High-density MPs were notably deposited in the reservoir sediments. The analysis of the MP communities revealed that the construction of cascade dams led to relative geographical isolation between different sampling sites, reducing the similarity of MP communities in the CRA. This study established a theoretical foundation for understanding the impact of cascade dam construction on the fate characteristics of MPs and their potential risks in plateau areas.
Collapse
Affiliation(s)
- Yixuan Liu
- College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Shaoting Zhao
- Agricultural Technology Promotion Center of Xi'an, Xi'an, Shaanxi 710000, PR China
| | - Dongzhi Wang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Shichen Wang
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xiaofan Ding
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China
| | - Kaiyang Han
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Ruiying Wang
- Xi'an Institute of Environmental Hygiene Sciences, Xi'an, Shaanxi 710075, PR China
| | - Yuyang Kou
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Guangqian Zhou
- College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Weibo Shen
- College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| |
Collapse
|
6
|
Liu K, Li Q, Andrady AL, Wang X, He Y, Li D. Underestimated activity-based microplastic intake under scenario-specific exposures. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 18:100316. [PMID: 37860830 PMCID: PMC10583090 DOI: 10.1016/j.ese.2023.100316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 09/04/2023] [Accepted: 09/11/2023] [Indexed: 10/21/2023]
Abstract
Despite increasing alarms over the health impacts of microplastics (MPs) due to their detection in human organs and feces, precise exposure evaluations remain scarce. To comprehend their risks, there is a distinct need to prioritize quantitive estimates in MP exposome, particularly at the environmentally-realistic level. Here we used a method rooted in real-world MP measurements and activity patterns to determine the daily intake of MPs through inhalation and from ground dust/soil ingestion. We found that nearly 80% of this intake comes from residential sectors, with activity intensity and behavioral types significantly affecting the human MP burden. The data showed a peak in MP exposure for those aged 18-64. When compared to dietary MP intake sources like seafood, salt, and water, we identified a previously underestimated exposure from inhalation and dust/soil ingestion, emphasizing the need for more realistic evaluations that incorporate activity factors. This discovery raises questions about the accuracy of past studies and underscores MP's potential health risks. Moreover, our time-based simulations revealed increased MP intake during the COVID-19 lockdown due to more surface dust ingestion, shedding light on how global health crises may inadvertently elevate MP exposure risks.
Collapse
Affiliation(s)
- Kai Liu
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 500 Dongchuan Road, Shanghai, 200062, China
- Plastic Marine Debris Research Center, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
- Regional Training and Research Center on Plastic Marine Debris and Microplastics, IOC-UNESCO, 500 Dongchuan Road, Shanghai, 200241, China
| | - Qingqing Li
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 500 Dongchuan Road, Shanghai, 200062, China
- Regional Training and Research Center on Plastic Marine Debris and Microplastics, IOC-UNESCO, 500 Dongchuan Road, Shanghai, 200241, China
| | - Anthony L. Andrady
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA
| | - Xiaohui Wang
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 500 Dongchuan Road, Shanghai, 200062, China
- Plastic Marine Debris Research Center, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
- Regional Training and Research Center on Plastic Marine Debris and Microplastics, IOC-UNESCO, 500 Dongchuan Road, Shanghai, 200241, China
| | - Yinan He
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 500 Dongchuan Road, Shanghai, 200062, China
- Plastic Marine Debris Research Center, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
- Regional Training and Research Center on Plastic Marine Debris and Microplastics, IOC-UNESCO, 500 Dongchuan Road, Shanghai, 200241, China
| | - Daoji Li
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 500 Dongchuan Road, Shanghai, 200062, China
- Plastic Marine Debris Research Center, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
- Regional Training and Research Center on Plastic Marine Debris and Microplastics, IOC-UNESCO, 500 Dongchuan Road, Shanghai, 200241, China
| |
Collapse
|
7
|
Wang X, Wang X, Zhu W, Ding L, Liang X, Wu R, Jia H, Huang X, Guo X. Insight into interactions between microplastics and fulvic acid: Mechanisms affected by microplastics type. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169427. [PMID: 38135066 DOI: 10.1016/j.scitotenv.2023.169427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023]
Abstract
Microplastics (MPs) can interact with dissolved organic matter (DOM), a common component found in the environment. However, the effect of MPs type on its interaction with DOM has not been systematically studied. Therefore, the binding properties of different MPs with fulvic acid (FA) were explored in this study. The results showed that polypropylene (PP) and polyethylene (PE) had higher adsorption affinity for FA than polystyrene (PS) and polyvinyl chloride (PVC). The interaction between MPs and FA conformed to the pseudo-first-order model and Freundlich model (except PS). The interaction mechanisms between various MPs tested in this paper and FA are considered to be different. PP, PE and PS interacted with the aromatic structure of FA and were entrapped in the FA polymers by the carboxyl groups and CO bonds, resulting in a highly conjugated co-polymer, suggesting that oxygen-containing functional groups played a key role. However, it was assumed that the interaction between PVC and FA was more likely to be caused by hydrophobic interaction. This research will help to enhance our comprehension of the environmental behavior of MPs and their interaction with the DOM specifically.
Collapse
Affiliation(s)
- Xinglei Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaoxiao Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Weimin Zhu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ling Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Xujun Liang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Renren Wu
- State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China.
| | - Hongtao Jia
- College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China
| | - Xianfei Huang
- Guizhou Provincial Key Laboratory for Environment, Guizhou Normal University, Guiyang, Guizhou 550001, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
8
|
Khatoon N, Mallah MA, Yu Z, Qu Z, Ali M, Liu N. Recognition and detection technology for microplastic, its source and health effects. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11428-11452. [PMID: 38183545 DOI: 10.1007/s11356-023-31655-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 12/17/2023] [Indexed: 01/08/2024]
Abstract
Microplastic (MP) is ubiquitous in the environment which appeared as an immense intimidation to human and animal health. The plastic fragments significantly polluted the ocean, fresh water, food chain, and other food items. Inadequate maintenance, less knowledge of adverse influence along with inappropriate usage in addition throwing away of plastics items revolves present planet in to plastics planet. The present study aims to focus on the recognition and advance detection technologies for MPs and the adverse effects of micro- and nanoplastics on human health. MPs have rigorous adverse effect on human health that leads to condensed growth rates, lessened reproductive capability, ulcer, scrape, and oxidative nervous anxiety, in addition, also disturb circulatory and respiratory mechanism. The detection of MP particles has also placed emphasis on identification technologies such as scanning electron microscopy, Raman spectroscopy, optical detection, Fourier transform infrared spectroscopy, thermo-analytical techniques, flow cytometry, holography, and hyperspectral imaging. It suggests that further research should be explored to understand the source, distribution, and health impacts and evaluate numerous detection methodologies for the MPs along with purification techniques.
Collapse
Affiliation(s)
- Nafeesa Khatoon
- College of Public Health, Zhengzhou University, Zhengzhou, 540001, People's Republic of China
| | - Manthar Ali Mallah
- College of Public Health, Zhengzhou University, Zhengzhou, 540001, People's Republic of China.
| | - Zengli Yu
- College of Public Health, Zhengzhou University, Zhengzhou, 540001, People's Republic of China
| | - Zhi Qu
- Institute of Chronic Disease Risk Assessment, School of Nursing, Henan University, Kaifeng, 475004, People's Republic of China
| | - Mukhtiar Ali
- Department of Chemical Engineering, Quaid-E-Awam University of Engineering, Science and Technology (QUEST), Nawabshah, 67480, Sindh, Pakistan
| | - Nan Liu
- College of Public Health, Zhengzhou University, Zhengzhou, 540001, People's Republic of China
- Institute of Chronic Disease Risk Assessment, School of Nursing, Henan University, Kaifeng, 475004, People's Republic of China
- Health Science Center, South China Hospital, Shenzhen University, Shenzhen, 518116, People's Republic of China
| |
Collapse
|
9
|
Yang X, Wan Z, Xiao J, Li F, Zhang F, Zhang Z. Evaluation of niche, diversity, and risks of microplastics in farmland soils of different rocky desertification areas. JOURNAL OF HAZARDOUS MATERIALS 2024; 466:133603. [PMID: 38280320 DOI: 10.1016/j.jhazmat.2024.133603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/18/2024] [Accepted: 01/21/2024] [Indexed: 01/29/2024]
Abstract
The occurrence, sources, effects, and risks of microplastics (MPs) in farmland soils have attracted considerable attention. However, the pollution and ecological characteristics of MPs in farmland soils at different levels of rocky desertification remain unclear. We collected and analyzed farmland soil samples from rocky desertification areas in Guizhou, China, ranging from no to heavy risks. We explored differences and migration of MPs across these areas, unveiled the relationship between diversity, niche, and risks of MPs, and determined influencing factors. The average abundance of soil MPs was 8721 ± 3938 item/kg, and the abundance and contamination factor (CF) of MPs escalated with the increase in rocky desertification level. Diversity, niche, and risk of soil MPs in different rocky desertification areas were significantly different. Rocky desertification caused both MP community differences and linked MP communities at different sites. Diversity and niche significantly affected MP risk (p < 0.05). Environmental factors with significant correlations (p < 0.05) with the abundance and ecological characteristics of MPs varied significantly in soils of different rocky desertification areas. This study advances our comprehension of MP pollution in farmland soils within rocky desertification areas, offering essential data and theoretical insights for the development of control strategies.
Collapse
Affiliation(s)
- Xiuyuan Yang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Zuyan Wan
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Jinnan Xiao
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Fupeng Li
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Fudong Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Zhenming Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China.
| |
Collapse
|
10
|
Chandrakanthan K, Fraser MP, Herckes P. Microplastics are ubiquitous and increasing in soil of a sprawling urban area, Phoenix (Arizona). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167617. [PMID: 37804992 DOI: 10.1016/j.scitotenv.2023.167617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/11/2023] [Accepted: 10/04/2023] [Indexed: 10/09/2023]
Abstract
Microplastics are environmental contaminants that have been extensively studied in marine and aquatic environments; terrestrial ecosystems, where most microplastics originate and have the potential to accumulate, typically receive less attention. This study aims to investigate the spatial and temporal soil concentrations of microplastics in a large desert metropolitan area, the Central Arizona-Phoenix Long-Term Ecological Research (CAP-LTER) area. Soil samples from the Ecological Survey of Central Arizona (ESCA) surveys (2005 and 2015) were leveraged to study spatial distributions and the temporal change of microplastic abundances. The temporal soil microplastics data were supplemented by microplastics deposition fluxes in a central location within the area (Tempe, AZ) for a period of one year (Oct 5th, 2020 to Sept 22nd, 2021). Samples were processed and microplastics were counted under an optical microscope to obtain quantitative information of their distribution in soil. Results for the spatial variation of the microplastic abundances in soil samples in Phoenix and the surrounding areas of the Sonoran Desert from 2015 depict microplastics as ubiquitous and abundant in soils (122 to 1299 microplastics/kg) with no clear trends between different locations. Microplastics deposition fluxes show substantial deposition in the local area (71 to 389 microplastics/m2/day with an average deposition flux of 178 microplastics/m2/day) but the role of resuspension and redistribution by dust storms to deposition may contribute to the unclear spatial trends. Comparison between the 2005 and 2015 surveys show a systematic increase in the abundance of microplastics and a decrease in microplastics size. Micro-Raman spectroscopy identified a variety of plastics including PE, PS, PVC, PA, PES and PP. However, a majority of microplastics remained chemically unidentifiable. Polyethylene was present in 75 % of the sampling sites and was the most abundant polymer on average in all soil samples.
Collapse
Affiliation(s)
| | - Matthew P Fraser
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287, United States
| | - Pierre Herckes
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, United States.
| |
Collapse
|
11
|
Fu F, Sun Y, Yang D, Zhao L, Li X, Weng L, Li Y. Combined pollution and soil microbial effect of pesticides and microplastics in greenhouse soil of suburban Tianjin, Northern China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 340:122898. [PMID: 37944885 DOI: 10.1016/j.envpol.2023.122898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/12/2023]
Abstract
Current-used pesticides (CUPs) and plastic films are essential materials used in greenhouse cultivation, which can lead to the residual accumulation of CUPs and microplastics (MPs) over time. The impact of CUPs and MPs on soil quality and food safety cannot be overlooked. However, the combined pollution resulting from CUPs and MPs in greenhouse soil remains poorly understood. In this study, we conducted a survey at 30 greenhouse sites in the Wuqing District of Tianjin, China, to investigate the pollution levels and characteristics of CUPs and MPs using QuEChERS combined with LC-MS/MS, and density extraction, 30% H2O2 digestion and micro-fourier transform infrared spectroscopy, respectively. Additionally, we aimed to evaluate the interactions among these two pollutants, soil physicochemical properties, and the bacterial community in the soil. CUPs were frequently detected in the examined soil samples; however, they posed no significant ecological risks due to their low levels. Furthermore, MPs, which predominantly comprised fragmented and fibrous polyethylene (PE) and polypropylene (PP) particles smaller than 1.0 mm, could potentially degrade into nanoplastics, which might subsequently enter the food chain and pose a serious threat to human health. We observed no substantial correlations between CUPs and MPs, except for a negative correlation between dimethomorph and film MPs. The soil pH and total organic carbon (TOC) exhibited interactions with both types of pollutants, whereas soil clay content (CC) only correlated with CUPs, and soil available nitrogen (AN) only correlated with MPs. The variability of soil bacterial communities among the 30 sampling sites was minimal, with the dominant genus being Bacillus. Soil pH, TOC, and CC collectively exerted a strong influence on the microbial community across all samples; however, the effects of CUPs and MPs on the soil microbial structure were marginal. These results contribute to a comprehensive understanding of the environmental stress and ecological risks associated with the combined pollution of CUPs and MPs.
Collapse
Affiliation(s)
- Furong Fu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs / Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA / Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, China
| | - Yang Sun
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs / Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA / Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, China.
| | - Dan Yang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs / Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA / Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, China
| | - Lixia Zhao
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs / Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA / Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, China
| | - Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs / Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA / Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, China
| | - Liping Weng
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs / Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, MARA / Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, China
| | - Yongtao Li
- College of Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| |
Collapse
|
12
|
Zhang Z, Zhang F, Yang X, Zhang J. The occurrence and distributions characteristics of microplastics in soils of different land use patterns in Karst Plateau, Southwest China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167651. [PMID: 37813260 DOI: 10.1016/j.scitotenv.2023.167651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/05/2023] [Accepted: 10/05/2023] [Indexed: 10/11/2023]
Abstract
Microplastics (MPs) in soils have attracted attention worldwide. However, there are few studies on the abundance and morphological characteristics of MPs under different land use patterns in karst areas. In this work, the distribution characteristics of MPs in soils from five different land use patterns, including industrial mining warehouse (IW), cropland (CL), forest land (FL), grassland (GL), and garden land (GP) in karst mountainous areas of southwest China were investigated. The results suggested that soils in Karst Plateau of Guizhou province under different land use patterns have all been polluted by MPs. The average microplastic abundances of IW, CL, FL, GL, and GP were 3114, 2948, 2770, 2718, and 4200 item kg-1. In the GP and GL soils, foam was the dominant form of MPs (47.53 % and 45.92 %), with pellet MPs accounting for the smallest proportion, while in IW, CL, and FL soils showed the opposite result. The MPs in all soil samples were dominated by small particles (0-0.5 mm), and the main components were PE, PP, PVC, and PET. Meanwhile, the characteristics of MPs in CL soils varied depending on the planted crops. The average abundances of soil microplastics in farmlands planted with corn, pepper, cabbage, watermelon, and other crops were 2504, 2792, 2987, 2370, and 3655 item kg -1. We suggested that land use pattern and crop type may influence karst soil microplastic contamination. The results of this study provide a scientific basis for understanding and controlling the distribution, degradation, and migration of MP pollution in karst regions.
Collapse
Affiliation(s)
- Zhenming Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China
| | - Fudong Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Xiuyuan Yang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Jiachun Zhang
- Guizhou Botanical Garden, Guizhou Academy of Sciences, Guiyang 550004, China.
| |
Collapse
|
13
|
Mubin AN, Islam ARMT, Hasan M, Islam MS, Ali MM, Siddique MAB, Alam MS, Rakib MRJ, Islam MS, Momtaz N, Senapathi V, Idris AM, Malafaia G. The path of microplastics through the rare biodiversity estuary region of the northern Bay of Bengal. JOURNAL OF CONTAMINANT HYDROLOGY 2024; 260:104271. [PMID: 38056088 DOI: 10.1016/j.jconhyd.2023.104271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/01/2023] [Accepted: 11/25/2023] [Indexed: 12/08/2023]
Abstract
Due to its harmful effects on ecosystems and human health, microplastic (MP) pollution has become a significant environmental problem on a global scale. Although MPs' pollution path and toxic effects on marine habitats have been examined worldwide, the studies are limited to the rare biodiversity estuary region of Hatiya Island from the northern Bay of Bengal. This study aimed to investigate the MP pollution path and its influencing factors in estuarine sediments and water in rare biodiversity Hatiya Island in the northern Bay of Bengal. Sixty water and sediment samples were collected from 10 sampling sites on the Island and analyzed for MPs. The abundance of MPs in sediment ranged from 67 to 143 pieces/kg, while the abundance in water ranged from 24.34 to 59 pieces/m3. The average concentrations of MPs in sediment and water were 110.90 ± 20.62 pieces/kg and 38.77 ± 10.09 pieces/m3, respectively. Most identified MPs from sediment samples were transparent (51%), while about 54.1% of the identified MPs from water samples were colored. The fragment was the most common form of MP in both compartments, with a value of 64.6% in sediment samples and 60.6% in water samples. In sediment and water samples, almost 74% and 80% of MP were <0.5 mm, respectively. Polypropylene (PP) was the most abundant polymer type, accounting for 51% of all identified polymers. The contamination factor, pollution load index, polymer risk score, and pollution risk score values indicated that the study area was moderately polluted with MPs. The spatial distribution patterns and hotspots of MPs echoed profound human pathways. Based on the results, sustainable management strategies and intervention measures were proposed to reduce the pollution level in the ecologically diverse area. This study provides important insights into evaluating estuary ecosystem susceptibility and mitigation policies against persistent MP issues.
Collapse
Affiliation(s)
- Al-Nure Mubin
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh
| | - Abu Reza Md Towfiqul Islam
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh; Department of Development Studies, Daffodil International University, Dhaka 1216, Bangladesh.
| | - Mehedi Hasan
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh
| | - Md Saiful Islam
- Department of Soil Science, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
| | - Mir Mohammad Ali
- Department of Aquaculture, Sher - e - Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Md Abu Bakar Siddique
- Institute of National Analytical Research and Service (INARS), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka 1205, Bangladesh
| | - Md Sha Alam
- Institute of Mining, Mineralogy & Metallurgy (IMMM), Bangladesh Council of Scientific & Industrial Research (BCSIR), Joypurhat 5900, Bangladesh
| | - Md Refat Jahan Rakib
- Department of Fisheries and Marine Science, Faculty of Science, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Muhammad Saiful Islam
- Fiber and Polymer Research Division, BCSIR Laboratories Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka 1205, Bangladesh
| | - Nasima Momtaz
- Biological Research Division, BCSIR Laboratories Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka 1205, Bangladesh
| | | | - Abubakr M Idris
- Department of Chemistry, College of Science, King Khalid University, Abha 62529, Saudi Arabia; Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
| | - Guilherme Malafaia
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Goiânia, GO, Brazil; Post-Graduation Program in Ecology, Conservation, and Biodiversity, Federal University of Uberlândia, Uberlândia, MG, Brazil; Post-Graduation Program in Biotechnology and Biodiversity, Federal University of Goiás, Goiânia, GO, Brazil.
| |
Collapse
|
14
|
Pan J, Zhang Q, Zhang K, Zhang Z, Guo X. Occurrence of microplastics in agricultural soils in ecologically fragile areas of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166350. [PMID: 37591376 DOI: 10.1016/j.scitotenv.2023.166350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/31/2023] [Accepted: 08/15/2023] [Indexed: 08/19/2023]
Abstract
The pollution caused by microplastics (MPs), an emerging pollutant, has been receiving continuous concern. However, the distribution characteristics of MPs in ecologically fragile areas (EFAs), which are sensitive to environmental change and pollution, are still unclear. Here, the abundance and pollution characteristics of MPs in agricultural soils in four typical EFAs in China, namely semiarid farming-pastoral area (SFPA), desert-oasis interlaced area (DOIA), plateau composite erosion area (PCEA) and southwest karst area (SWKA) were investigated. MPs were detected in all agricultural soil samples with a mean abundance of 2685 ± 938 n/kg. DOIA (3193 ± 630 n/kg) had the largest abundance of MPs in agricultural soils, followed by SWKA (2948 ± 819 n/kg), SFPA (2920 ± 935 n/kg), and PCEA (1680 ± 320 n/kg). MPs in four EFAs were mostly small size (0-0.49 mm), accounted for 81.71 %. Fragmented and pelleted MPs were the main shapes, occupying for 51.26 % and 28.53 %, respectively. In addition, Fourier transform infrared (FTIR) was applied to determine the polymer types of MPs and to assess the pollution risk of MPs, which ranged from 157 to 938, indicating a moderate to high risk. The results revealed that EFAs located in remote inland areas were considerably polluted by MPs, close to the developed coastal areas. This study provided systematic data on MPs pollution of EFAs, which is crucial in preventing further environmental degradation and promoting ecological restoration.
Collapse
Affiliation(s)
- Jianrui Pan
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qi Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Kaiyue Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhenming Zhang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550003, China.
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
15
|
Yang X, Zhang Z, Guo X. Impact of soil structure and texture on occurrence of microplastics in agricultural soils of karst areas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:166189. [PMID: 37567305 DOI: 10.1016/j.scitotenv.2023.166189] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
The impact of microplastics (MPs) on soil ecosystems has attracted widespread attention; however, the effects of soil structure and texture on the occurrence of MPs are not fully understood. In this study, we investigated the effects of soil structure and texture on the abundance of MPs and their potential mechanisms in agricultural soils of karst areas in Guizhou, China. The results showed the average abundance of MPs was 2948 items/kg. The soil texture in the study area can be categorized into seven types such as powdered-light clay, the range of total soil porosity was 39.05-69.22 % and the range of soil bulk density was 0.66-1.51 g/cm3. Soils with a powdered-light clay, low soil porosity, and low soil bulk density showed higher MPs pollution. The percentage of pellet MPs in agricultural soils with a powdered-light clay was 84 %, which was higher than that of the other soil textures. The direct effects of soil texture, soil porosity, and soil bulk density on MPs abundance were much lower than the indirect effects, with soil texture having the highest effect on MPs abundance. We speculated that karst geology may affect the accumulation and distribution of MPs in soil by affecting soil texture and structure, which, in turn, affects the fragmentation and migration of MPs. These findings will help to better understand the mechanisms of soil MPs pollution and provide a scientific basis for the development of relevant control strategies.
Collapse
Affiliation(s)
- Xiuyuan Yang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Zhenming Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China; Key Laboratory of Kast Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China.
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China.
| |
Collapse
|
16
|
Yang X, Zhang Z, Zhang J. Study of soil microplastic pollution and influencing factors based on environmental fragility theory. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165435. [PMID: 37442481 DOI: 10.1016/j.scitotenv.2023.165435] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/07/2023] [Accepted: 07/08/2023] [Indexed: 07/15/2023]
Abstract
Soil microplastics (MPs) pollution is a global concern, but the distribution of MPs and the factors affecting the distribution of MPs in different ecologically fragile karst areas remain poorly understood. Here, we investigated the spatial distribution, characteristics, and composition of MPs in different ecologically fragile karst areas of Guizhou Province and explored the relationship between ecosystem fragility and MPs. Structural equation models combined with robust random forest (RF) models were used to clarify the effects of karst soil properties on MPs and quantify their relative contributions. The abundance of soil MPs in ecologically fragile karst areas was 2949 item kg-1, and the risk of MPs contamination was highest in medium-fragile areas. The robust RF models precisely predicted the abundance of soil MPs in different fragile areas, and the mean root mean square error and R2 were 0.21 and 0.93, respectively. The contribution of karst soil properties to the abundance of MPs was estimated. Some soil chemical properties had a significant effect (p < 0.05) on MPs pollution in ecologically fragile karst areas. The results of our study suggest that the fragile ecological environment may exacerbate MPs pollution. Our study also contributes to establish a scientific theoretical foundation for the utilization of plastics and the prevention and control of microplastics pollution in karst ecosystems.
Collapse
Affiliation(s)
- Xiuyuan Yang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Zhenming Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China; Key Laboratory of Kast Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China.
| | - Jiachun Zhang
- Guizhou Botanical Garden, Guizhou Academy of Sciences, Guiyang 550004, Guizhou, China.
| |
Collapse
|
17
|
Azeem I, Shakoor N, Chaudhary S, Adeel M, Zain M, Ahmad MA, Li Y, Zhu G, Shah SAA, Khan K, Khan AA, Xu M, Rui Y. Analytical challenges in detecting microplastics and nanoplastics in soil-plant systems. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 204:108132. [PMID: 37918078 DOI: 10.1016/j.plaphy.2023.108132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 09/20/2023] [Accepted: 10/20/2023] [Indexed: 11/04/2023]
Abstract
Microplastics (MPx) and nanoplastics (NPx) are increasingly accumulating in terrestrial ecosystems, heightening concerns about their potential adverse effects on human health via the food chain. Techniques aimed at recovering the most challenging colloidal fractions of MPx and NPx, especially for analytical purposes, are limited. This systematic review emphasises the absence of a universal, efficient, and cost-effective analytical method as the primary hindrance to studying MPx and NPx in soil and plant samples. The study reveals that several methods, including density separation, organic matter removal, and filtration, are utilized to detect MPx or NPx in soil through vibrational spectroscopy and visual identification. Instruments such as Pyrolysis Gas Chromatography Mass Spectrometry (Py-GCMS), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR) Spectroscopy, and fluorescence microscopy are employed to identify MPx and NPx in plant tissue. In extraction procedures, organic solvents and sonication are used to isolate NPx from plant tissues, while Pyrolysis GC-MS quantifies the plastics. SEM and TEM serve to observe and characterize NPx within plant tissues. Additionally, FTIR and fluorescence microscopy are utilized to identify polymers of MPx and NPx based on their spectral characteristics and fluorescence signals. The findings from this review clarify the identification and quantification methods for MPx and NPx in soil and plant systems and provide a comprehensive methodology for assessing MPx/NPx in the environment.
Collapse
Affiliation(s)
- Imran Azeem
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation and College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Noman Shakoor
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation and College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Sadaf Chaudhary
- Department of Botany, University of Agriculture Faisalabad, Pakistan
| | - Muhammad Adeel
- BNU-HKUST Laboratory of Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, 18 Jinfeng Road, Tangjiawan, Zhuhai, Guangdong, PR China.
| | - Muhammad Zain
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Crop Cultivation and Physiology of Jiangsu Province, College of Agriculture, Yangzhou University, Yangzhou, 225009, PR China
| | - Muhammad Arslan Ahmad
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, PR China
| | - Yuanbo Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation and College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Guikai Zhu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation and College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Syed Aizaz Ali Shah
- College of Horticulture, China Agricultural University, Beijing, 100193, PR China
| | - Kashif Khan
- College of Harbin, Northeast Forestry University, Harbin, PR China
| | - Adnan Anwar Khan
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Ming Xu
- Department of Botany, University of Agriculture Faisalabad, Pakistan
| | - Yukui Rui
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation and College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China.
| |
Collapse
|
18
|
Dong H, Liu Y, Cui J, Zhu M, Ji W. Spatial and temporal variations of vegetation cover and its influencing factors in Shandong Province based on GEE. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1023. [PMID: 37548802 DOI: 10.1007/s10661-023-11650-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/29/2023] [Indexed: 08/08/2023]
Abstract
Economic development has rapidly progressed since the implementation of reform and opening up policies, posing significant challenges to sustainable development, especially to vegetation, which plays a crucial role in maintaining ecosystem service functions and promoting green low-carbon transformations. In this study, we estimated the fractional vegetation cover (FVC) in Shandong Province from 2000 to 2020 using the Google Earth Engine (GEE) platform. The spatial and temporal changes in FVC were analyzed using gravity center migration analysis, trend analysis, and geographic detector, and the vegetation changes of different land use types were analyzed to reveal the internal driving mechanism of FVC changes. Our results indicate that vegetation cover in Shandong Province was in good condition during the period 2000 to 2020. The high vegetation cover classes dominated, and overall changes were relatively small, with the center of gravity of vegetation cover generally shifting towards the southwest. Land use type, soil type, population density, and GDP factors had the most significant impact on vegetation cover change in Shandong Province. The interaction of these factors enhanced the effect on vegetation cover change, with land use type and soil type having the highest degree of influence. The observational results of this study can provide data support for the policy makers to formulate new ecological restoration strategies, and the findings would help facilitate the sustainability management of regional ecosystem and natural resource planning.
Collapse
Affiliation(s)
- Hao Dong
- School of Surveying and Geo-Informatics, Shandong Jianzhu University, No. 1000, Fengming Road, Licheng District, Jinan, 250101, China
| | - Yaohui Liu
- School of Surveying and Geo-Informatics, Shandong Jianzhu University, No. 1000, Fengming Road, Licheng District, Jinan, 250101, China
| | - Jian Cui
- School of Surveying and Geo-Informatics, Shandong Jianzhu University, No. 1000, Fengming Road, Licheng District, Jinan, 250101, China.
| | - Mingshui Zhu
- Ji'nan Institute of Survey and Investigation, Jinan, 250101, China
| | - Wenxin Ji
- School of Surveying and Geo-Informatics, Shandong Jianzhu University, No. 1000, Fengming Road, Licheng District, Jinan, 250101, China
| |
Collapse
|
19
|
Wang Y, Liu L, Cao S, Yu J, Li X, Su Y, Li G, Gao H, Zhao Z. Spatio-temporal variation of soil microplastics as emerging pollutant after long-term application of plastic mulching and organic compost in apple orchards. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 328:121571. [PMID: 37028788 DOI: 10.1016/j.envpol.2023.121571] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/20/2023] [Accepted: 04/03/2023] [Indexed: 05/09/2023]
Abstract
Microplastics (MPs) pollution in agroecosystems have aroused great alarm and widespread concern. However, the spatial distribution and temporal variation characteristics of MPs in apple orchards with long-term plastic mulching and organic compost input are still poorly understood. This study investigated MPs accumulation characteristics and vertical distribution after applying plastic mulch and organic compost in apple orchards for 3 (AO-3), 9 (AO-9), 17 (AO-17), and 26 (AO-26) years on the Loess Plateau. The clear tillage (no plastic mulching and organic composts) area was used as a control (CK). At a soil depth of 0-40 cm, AO-3, AO-9, AO-17, and AO-26 treatments increased the abundances of MPs, and the black fibers and fragments of rayon and polypropylene were dominant. In the 0-20 cm soil layer, the abundances of MPs increased with the treatment time; the abundance was 4333 pieces kg-1 after 26 years of treatment, gradually decreasing with soil depth. In different treatments and soil layers, the percentages of MPs <1000 μm were dominant (>50%). The AO-17 and AO-26 treatments significantly increased the MPs with the size of 0-500 μm at 0-40 cm and the abundances of pellets in 0-60 cm soil. In conclusion, the long-term (≥17 years) application of plastic mulching and organic composts increased the abundances of small particles at 0-40 cm, and plastic mulching contributed the most to MPs, while organic composts increased the complexity and diversity of MPs.
Collapse
Affiliation(s)
- Yuanji Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A & F University, Yangling, 712100, Shaanxi, China; College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Li Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A & F University, Yangling, 712100, Shaanxi, China; College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Shan Cao
- College of Food Science and Engineering, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Jing Yu
- College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Xiangyu Li
- College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Yating Su
- College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Gaochao Li
- College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Hua Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A & F University, Yangling, 712100, Shaanxi, China; College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Zhengyang Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A & F University, Yangling, 712100, Shaanxi, China; College of Horticultur, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|
20
|
Xiao C, Zhang M, Ding L, Qiu X, Guo X. New sight of microplastics aging: Reducing agents promote rapid aging of microplastics under anoxic conditions. JOURNAL OF HAZARDOUS MATERIALS 2023; 451:131123. [PMID: 36871465 DOI: 10.1016/j.jhazmat.2023.131123] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/16/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
The aging of microplastics (MPs) occurs extensively in the environment, and understanding the aging mechanisms of MPs is essential to study the properties, fate and environmental impact of MPs. We proposed a creative hypothesis that polyethylene terephthalate (PET) can be aged by reducing reactions with reducing agents. Simulation experiments based on the principle of reduction of carbonyl by NaBH4 were conducted to test the correctness of this hypothesis. The results showed that after 7 days of experiments, physical damage and chemical transformation occurred in the PET-MPs. The particle size of MPs was reduced by 34.95-55.93 %, and the C/O ratio was increased by 2.97-24.14 %. The changing order of surface functional groups (CO > C-O > C-H > C-C) was obtained. The occurrence of reductive aging and electron transfer of MPs was further supported by electrochemical characterization experiments. These results together reveal the reductive aging mechanism of PET-MPs: CO is firstly reduced to C-O by BH4- attack, and then further reduced to ·R. The resulting ·R recombines to form new C-H and C-C. This study is beneficial to deepen the understanding of the chemical aging of MPs, and can provide a theoretical basis for further research on the reactivity of oxygenated MPs with reducing agents.
Collapse
Affiliation(s)
- Chuanqi Xiao
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Mengwei Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Ling Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xinran Qiu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, PR China.
| |
Collapse
|
21
|
Hoshyari E, Hassanzadeh N, Keshavarzi B, Jaafarzadeh N, Rezaei M. Characterization of microplastic, metals associated and ecological risk assessment in the topsoil of shiraz metropolis, south west of Iran. CHEMOSPHERE 2023; 335:139060. [PMID: 37257658 DOI: 10.1016/j.chemosphere.2023.139060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 04/11/2023] [Accepted: 05/26/2023] [Indexed: 06/02/2023]
Abstract
This research studied the occurrence, risk assessment and metals associated with microplastic (MPs) in soil of different land-use types in the south west of Iran. One hundred samples were collected from topsoil and MPs were extracted using the floatation method. In total, 9258 MPs particles with mean of 92.85 ± 119.24 particles kg-1 were counted. The mean MPs abundance in urban soils was 2.8 and 3.2 times higher than in industrial and agricultural soils, respectively. Fragment (43%) and small MPs (100-250 μm; 41%), were the dominant shape and size, respectively. Four main polymer types including Poly Ethylene (High Density Poly Ethylene and Low Density Poly Ethylene), Nylon (PA), Poly Propylene (PP), and Poly Styrene (PS) were identified. Nylon (29%) and PE (29%) were dominant polymer types. MPs particles in soil contained different levels of metals such as Cd, Cr, Cu, Fe, Hg, Pb, Zn, and Y, except La and Yb. The mean concentrations of metals were higher in MPs than in soil. The indices of MPs-induced risk (Hstudyarea=16.8) showed a hazard level (III) in the study area. Pollution load index (PLILandusetype) showed hazard level (II) for urban soils and hazard level (I) for industrial and agriculture soils, respectively. Overall, risk index indicated high to extreme danger for MPs pollution in the study area. This is the comprehensive study on the occurrence of soil MPs and associated metals, which provides basic information for a further study concerning ecosystem health in Shiraz.
Collapse
Affiliation(s)
- Ebrahim Hoshyari
- Department of Environmental Sciences, College of Faculty of Natural Resource and Environmental, Malayer University, Malayer, Iran.
| | - Nasrin Hassanzadeh
- Department of Environmental Sciences, College of Faculty of Natural Resource and Environmental, Malayer University, Malayer, Iran.
| | - Behnam Keshavarzi
- Department of Earth Sciences, College of Science, Shiraz University, Shiraz, Iran.
| | - Nematollah Jaafarzadeh
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Mahrooz Rezaei
- Meteorology and Air Quality Group, Wageningen University & Research, Wageningen, the Netherlands.
| |
Collapse
|
22
|
Rezaei Rashti M, Hintz J, Esfandbod M, Bahadori M, Lan Z, Chen C. Detecting microplastics in organic-rich materials and their potential risks to earthworms in agroecosystems. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 166:96-103. [PMID: 37167710 DOI: 10.1016/j.wasman.2023.04.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/23/2023] [Accepted: 04/25/2023] [Indexed: 05/13/2023]
Abstract
Microplastics (MPs) are a major emerging contaminant in agroecosystems, due to their significant resistance to degradation in terrestrial environments. Although previous investigations have reported the harmful effects of MPs contamination on soil biological properties, still little is known about the characteristics and fate of MPs in biosolid-amended soils and their risks to soil biota, particularly earthworms. We determined microplastics' concentration, size distribution, and chemical composition in 3 sewage sludge biosolids and 6 biosolid-amended agricultural soils. In addition, we assessed the potential short-term risks of MPs to earthworms' (Amynthas Gracilis and Eisenia Fetida) survival rate and fitness in an environmentally relevant exposure study (28 days). Biosolid-amended soils (1000-3100 MPs kg-1 dry mass) showed ≈30 times lower MPs content than investigated biosolids (55400-73800 MPs kg-1 dry mass), with microplastic fragment to fibre ratios between 0.2 and 0.6 and 0.3-0.4 in soils and biosolids, respectively. Total MPs dry mass was also ≈19 times lower in assessed soils (12-26 mg kg-1) than biosolids (328-440 mg kg-1). On average 77% and 80% of plastic fragments had a lower dimension than 500 µm, while 50% and 67% of plastic fibres had a length of less than 1000 µm in soil and biosolid samples, respectively. Polyethylene (23.6%) was the major source of microplastic contamination in biosolid-amended soils, while polyethylene terephthalate (41.6%) showed the highest concentration in biosolid samples. Spiked polyethylene MPs did not show any significant effect on earthworms' survival rate (93-99%). However, biosolid application significantly (P < 0.05) decreased survival rate of Eisenia Fetida (81%) but showed no significant effect on Amynthas Gracilis (93%). Biosolid amendment significantly (P < 0.05) decreased earthworms' growth rate, with higher impact on Eisenia Fetida than Amynthas Gracilis, while there were no significant differences between control and microplastic spiked treatments. The overall decrease in MPs concentration of earthworm casts, compared with initial MPs concentrations in soil, indicated that the investigated species did not bioaccumulate MPs during the exposure experiment.
Collapse
Affiliation(s)
- Mehran Rezaei Rashti
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia; School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia.
| | - Jessica Hintz
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Maryam Esfandbod
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
| | - Mohammad Bahadori
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
| | - Zhongming Lan
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
| | - Chengrong Chen
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia; School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia.
| |
Collapse
|
23
|
Zhang M, Zheng Y, Li J, Liu K, Wang H, Gu H, Zhang Z, Guo X. Distribution characteristics of microplastics in soil of Loess Plateau in northwest China and their relationship with land use type. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 868:161674. [PMID: 36652967 DOI: 10.1016/j.scitotenv.2023.161674] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/07/2023] [Accepted: 01/13/2023] [Indexed: 06/17/2023]
Abstract
The widespread distribution of microplastics (MPs) in soil has aroused great concern. The land use type can affect the distribution characteristics of MPs, whereas the abundance of MPs in the Loess Plateau region and the influence of different land use types on it are unclear. This study checked into the distribution of MPs in the Loess Plateau region, studied the abundance of MPs in woodland, construction land, grassland and cultivated land, and analyzed the distribution characteristics of their shape, size, and color. The abundance of MPs in the Loess Plateau region reached 2982.34 items/kg, dominated by black, small size and fragment MPs. The order of average abundance of MPs was: cultivated land (3535 items/kg) > construction land (2809 items/kg) > woodland (2781 items/kg) > grassland (2658 items/kg). Fragment MPs were predominant in woodland, construction land and cultivated land, but film and fiber MPs were predominant in grassland. MPs in cultivated land and construction land mainly sourced from human activities, MPs in woodland and grassland were more likely to come from atmospheric deposition. Human activities and sunlight exposure can cause MPs to break down, while trees in woodland block rays of light, slowing MPs breakage to some extent. And the polymer type of MPs was mostly PE and the main ones were black. This study may provide important data for follow-up research on MPs in terrestrial ecosystems.
Collapse
Affiliation(s)
- Mengwei Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yu Zheng
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Junlin Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Kun Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Heng Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hongcheng Gu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhenming Zhang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550003, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
24
|
Shu X, Xu L, Yang M, Qin Z, Zhang Q, Zhang L. Spatial distribution characteristics and migration of microplastics in surface water, groundwater and sediment in karst areas: The case of Yulong River in Guilin, Southwest China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 868:161578. [PMID: 36638986 DOI: 10.1016/j.scitotenv.2023.161578] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/09/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Karst regions, due to their unique topography, may be more susceptible to contaminants such as microplastics from other ecosystems. However, few studies reported the occurrence of microplastics in karst areas. Here, we investigated the abundance of microplastics in surface water, sediments and groundwater. In addition, their spatial distribution characteristics and migration were also analyzed in a typical karst area, Yulong River, Guilin, China. Microplastic pollution was found in the sediments, surface water and especially groundwater in Yulong River. The abundance of microplastics was 0-4 items/L, 247-1708 items/kg and 0-4 items/L in surface water, sediments and groundwater, respectively. Microplastics in surface water and groundwater were fiber-based, while those in sediments were fragment-based. Polypropylene (PP), Polystyrene (PS) and Polyethylene terephthalate (PET) are dominant microplastic types in Yulong River. Moreover, the abundance of microplastic pollution in different functional areas ranked as follows: living area > agricultural area > landscape area. Clustering analysis showed that disposable tableware and plastic bags used in tourism activities might be the main source of microplastics. More importantly, our findings suggested that microplastics in groundwater could be the result of hydraulic exchange between groundwater and surface water in karst areas, rather than soil infiltration. These findings provided us with a further understanding of the pollution of microplastics in karst rivers.
Collapse
Affiliation(s)
- Xiaohua Shu
- School of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541000, PR China
| | - Lizhen Xu
- School of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541000, PR China
| | - Minghao Yang
- School of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541000, PR China
| | - Ziqi Qin
- School of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541000, PR China
| | - Qian Zhang
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, Guangxi 541000, PR China.
| | - Lishan Zhang
- School of Life and Environmental Science, Guilin University of Electronic Technology, Guilin, Guangxi 541000, PR China
| |
Collapse
|
25
|
Liu Y, Liu Y, Li Y, Bian P, Hu Y, Zhang J, Shen W. Effects of irrigation on the fate of microplastics in typical agricultural soil and freshwater environments in the upper irrigation area of the Yellow River. JOURNAL OF HAZARDOUS MATERIALS 2023; 447:130766. [PMID: 36669409 DOI: 10.1016/j.jhazmat.2023.130766] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/05/2023] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Agricultural activities are among the most significant sources of microplastics (MPs) in water. However, few studies have explored the effect of irrigation on the fate of MPs in agricultural systems. This study investigated the distribution of MPs in agricultural soil, surface water, and sediment of adjacent rivers, as well as the "MP communities" in various environments before and after irrigation in a typical agricultural irrigation area of the Yellow River. MPs were detected in all of the examined sites. The number of MPs in surface water and sediment increased after irrigation, whereas those in the surface soil of croplands decreased. In the vertical direction, irrigation accelerated the migration of MPs (< 100 µm) deep into the soil. The vertical mobility of fibers in soil was faster than that of other types of MPs. Moreover, irrigation decreased the correlation between soil properties and MPs in soils. MP community analysis indicated that irrigation enhanced the differences between MP communities among adjacent environments. Collectively, our findings confirmed that river water irrigation caused secondary MP pollution in the soil environment and accelerated MP pollution in deep soil. Therefore, this study provides a theoretical basis for the development of strategies for MP pollution control in agricultural soil.
Collapse
Affiliation(s)
- Yixuan Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yaxing Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yue Li
- College of Art and Design, Rural Vitalization Research Center in the Wuling Mountain Area, Huaihua University, Huaihua 418000, PR China
| | - Pengyang Bian
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yue Hu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Jie Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Weibo Shen
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China; College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| |
Collapse
|
26
|
Silori R, Shrivastava V, Mazumder P, Mootapally C, Pandey A, Kumar M. Understanding the underestimated: Occurrence, distribution, and interactions of microplastics in the sediment and soil of China, India, and Japan. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 320:120978. [PMID: 36586556 DOI: 10.1016/j.envpol.2022.120978] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
Microplastics (MPs) are non-biodegradable substances that can sustain our environment for up to a century. What is more worrying is the incapability of modern technologies to annihilate MPs from om environment. One ramification of MPs is their impact on every kind of life form on this planet, which has been discussed ahead; that is why these substances are surfacing in everyday discussions of scholars and researchers. This paper discusses the overview of the global occurrence, abundance, analysis, and remediation techniques of MPs in the environment. This paper primarily reviews the event and abundance of MPs in coastal sediments and agricultural soil of three major Asian countries, India, China, and Japan. A significant concentration of MPs has been recorded from these countries, which affirms its strong presence and subsequent environmental impacts. Concentrations such as 73,100 MPs/kg in Indian coastal sediments and 42,960 particles/kg in the agricultural soil of China is a solid testimony to prove their massive outbreak in our environment and require urgent attention towards this issue. Conclusions show that human activities, rivers, and plastic mulching on agricultural fields have majorly acted as carriers of MPs towards coastal and terrestrial soil and sediments. Later, based on recorded concentrations and gaps, future research studies are recommended in the concerned domain; a dearth of studies on MPs influencing Indian agricultural soil make a whole sector and its consumer vulnerable to the adverse effects of this emerging contaminant.
Collapse
Affiliation(s)
- Rahul Silori
- School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India
| | - Vikalp Shrivastava
- School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India
| | - Payal Mazumder
- School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India
| | - Chandrashekar Mootapally
- School of Applied Sciences & Technology (SAST), Gujarat Technological University (GTU), Ahmedabad, Gujarat, India
| | - Ashok Pandey
- School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India; Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001, India
| | - Manish Kumar
- School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India; Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501 Sur, Monterrey, 64849, Mexico.
| |
Collapse
|
27
|
Ge J, Wang M, Liu P, Zhang Z, Peng J, Guo X. A systematic review on the aging of microplastics and the effects of typical factors in various environmental media. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.117025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
|
28
|
Günther M, Imhof W. Simultaneous quantification of microplastic particles by non-deuterated (NoD) 1H-qNMR from samples comprising different polymer types. Analyst 2023; 148:1151-1161. [PMID: 36752546 DOI: 10.1039/d2an01751b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Facing microplastic contamination and thereby its impacts on the environment and health will probably be one of the most concerning challenges in our immediate future. Yet, data on these emerging pollutants are still scarce in many aspects leading to the ongoing development and expansion of analytical procedures and approaches. In recent years, despite being used formerly only for qualitative aspects, nuclear magnetic resonance spectroscopy (NMR) was introduced for the quantification of microplastic particles. By the combination of linear regression procedures, internal standards and the integration of proton NMR, the so-called qNMR method allows mass-based quantification of microplastics in a limited amount of time and independent of particle size. Based on this approach, further optimization through the simultaneous dissolution and quantification of multiple polymers is investigated. Individual requirements, known issues and considerations will be demonstrated along with additional possibilities for five polymers: polystyrene (PS), butadiene rubber (BR), polyvinylchloride (PVC), polyethylene terephthalate (PET) and polyamide (PA). The applicability of homopolymer-based calibrations is demonstrated for both the quantification of multiple homopolymers dissolved in a shared solvent system and the quantification of copolymers; for example, a styrene-butadiene copolymer (SBR). Linearities and limits of detection and quantification as well as precision and accuracy comparable to those of solely measured microplastic particles are achieved. The improvement significantly reduces the preparation and measurement time in combination with lowered costs. In addition, enhanced reliability was achieved by implementing hexamethyldisiloxane (HMDSO) as an internal standard in NoD measurements, replacing dichloromethane (DCM).
Collapse
Affiliation(s)
- Marcel Günther
- Institute of Integrated Natural Sciences, University Koblenz, Universitätsstr.1, D-56070 Koblenz, Germany.
| | - Wolfgang Imhof
- Institute of Integrated Natural Sciences, University Koblenz, Universitätsstr.1, D-56070 Koblenz, Germany.
| |
Collapse
|
29
|
Li W, Wang S, Wufuer R, Duo J, Pan X. Distinct soil microplastic distributions under various farmland-use types around Urumqi, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159573. [PMID: 36272480 DOI: 10.1016/j.scitotenv.2022.159573] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/10/2022] [Accepted: 10/15/2022] [Indexed: 06/16/2023]
Abstract
Very little is known about the occurrence of microplastics in the soils of various land uses, especially their distributional characteristics in the soils of arid areas. In this study, 24 sampling sites across three soil layers were investigated for three different farmland-use types (greenhouses, crop fields and vegetable fields) in the main agricultural and pastoral areas around Urumqi, China. The results demonstrated that the dominant sizes of soil microplastics were 0.2-0.5 and 0.5-1.0 mm, the main shape was film (85.93 %), the main color was white, and the main polymer was polyethylene (93.1 %), indicating that most microplastics derive from the damage to residual mulches. The microplastics abundance was highest in the greenhouse plots (7763 ± 2773 items/kg), followed by the vegetable plots (4128 ± 2235 items/kg) and then the crop fields (3178 ± 3172 items/kg). No significant differences were observed among the abundances of microplastics in the 0-10 cm (1822 ± 1345 items/kg), 10-20 cm (1566 ± 1139 items/kg) and 20-30 cm (1309 ± 1028 items/kg) layers, suggesting that microplastics can migrate to the deeper soil layer and are strongly influenced by tillage disturbance. The abundance of microplastics in the north of Urumqi was found to be higher than in the south, which is closely related to the division of agricultural functional zones and the intensity of agricultural management practices. It was found that different cropping characteristics and modes of agricultural use affect the abundance and migration of microplastics in various farmland-use types, and thus their distribution. This study provides important data for follow-up research on microplastics in arid terrestrial ecosystems, and corresponding policy-making on the management of these materials.
Collapse
Affiliation(s)
- Wenfeng Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuzhi Wang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rehemanjiang Wufuer
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jia Duo
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangliang Pan
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
| |
Collapse
|
30
|
Hao Y, Sun H, Zeng X, Dong G, Kronzucker HJ, Min J, Xia C, Lam SS, Shi W. Smallholder vegetable farming produces more soil microplastics pollution than large-scale farming. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120805. [PMID: 36470457 DOI: 10.1016/j.envpol.2022.120805] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Microplastics (MPs) accumulation in farmland has attracted global concern. Smallholder farming is the dominant type in China's agriculture. Compared with large-scale farming, smallholder farming is not constrained by restrictive environmental policies and public awareness about pollution. Consequently, the degree to which smallholder farming is associated with MP pollution in soils is largely unknown. Here, we collected soil samples from both smallholder and large-scale vegetable production systems to determine the distribution and characteristics of MPs. MP abundance in vegetable soils was 147.2-2040.4 MP kg-1 (averaged with 500.8 MP kg-1). Soil MP abundance under smallholder cultivation (730.9 MP kg-1) was twice that found under large-scale cultivation (370.7 MP kg-1). MP particle sizes in smallholder and large-scale farming were similar, and were mainly <1 mm. There were also differences in MP characteristics between the two types of vegetable soils: fragments (60%) and fibers (34%) were dominant under smallholder cultivation, while fragments (42%), fibers (42%), and films (11%) were dominant under large-scale cultivation. We observed a significant difference in the abundance of fragments and films under smallholder versus large-scale cultivation; the main components of MPs under smallholder cultivation were PP (34%), PE (28%), and PE-PP (10%), while these were PE (29%), PP (16%), PET (16%), and PE-PP (13%) under large-scale cultivation. By identifying the shape and composition of microplastics, it can be inferred that agricultural films were not the main MP pollution source in vegetable soil. We show that smallholder farming produces more microplastics pollution than large-scale farming in vegetable soil.
Collapse
Affiliation(s)
- Yaqiong Hao
- State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haijun Sun
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
| | - Xiaoping Zeng
- Jiangsu Provincial Agricultural Technology Extension Station, Nanjing, 210036, China
| | | | - Herbert J Kronzucker
- School of BioSciences, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Ju Min
- State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Changlei Xia
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Su Shiung Lam
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
31
|
Bi D, Wang B, Li Z, Zhang Y, Ke X, Huang C, Liu W, Luo Y, Christie P, Wu L. Occurrence and distribution of microplastics in coastal plain soils under three land-use types. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:159023. [PMID: 36167126 DOI: 10.1016/j.scitotenv.2022.159023] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/01/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Microplastic pollution is an issue of major environmental concern worldwide. Land-use type may affect the abundance, polymer types, and distribution characteristics of soil microplastics but their distribution remains unknown on the coastal plain of east China. Here, the abundance of microplastics in farmland (FL), plantation (P), and orchard/secondary forest (OSF) soils was determined on the east China coastal plain, and characteristics of the microplastics (shape, size, colour, and polymer composition) were analysed in soil samples collected from 33 sites. The average abundances of microplastics in FL, P, and OSF soils on the coastal plain of the east China coast were 185, 109, and 150 items kg-1, respectively. Small particles, fibres and transparent particles were the main characteristics of the microplastics observed. The polymer types were mainly PP and PET. The abundance of microplastics in farmland was positively correlated with population density in the study area. Therefore, agricultural activities associated with high population density are the main factors leading to the high abundance of microplastics in farmland soil.
Collapse
Affiliation(s)
- De Bi
- Suzhou Polytechnic Institute of Agriculture, Suzhou 215000, China; CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Beibei Wang
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhu Li
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yabing Zhang
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Xin Ke
- Centre for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Chengwang Huang
- Centre for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Wuxing Liu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yongming Luo
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Peter Christie
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Longhua Wu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| |
Collapse
|
32
|
Bullard JE, Zhou Z, Davis S, Fowler S. Breakdown and Modification of Microplastic Beads by Aeolian Abrasion. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:76-84. [PMID: 36519925 PMCID: PMC9835823 DOI: 10.1021/acs.est.2c05396] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 12/07/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Saltation is an important wind erosion process that can cause the modification and breakdown of particles by aeolian abrasion. It is recognized that microplastic particles can be transported by wind, but the effect of saltation on microplastic properties is unknown. This study examined the impact of simulated saltation alongside quartz grains on the size, shape, and surface properties of spherical microplastic beads. The diameter of the microplastics was reduced by 30-50% over 240-300 h of abrasion with a mass loss of c. 80%. For abrasion periods up to 200 h, the microplastic beads remained spherical with minimal change to overall shape. Over 95% of the fragments of plastic removed from the surface of the microbeads during the abrasion process had a diameter of ≤10 μm. In addition, during the abrasion process, fine particles derived from breakdown of the quartz grains became attached to the surfaces of the microbeads resulting in a reduction in carbon and an increase in silicon detected on the particle surface. The results suggest that microplastics may be mechanically broken down during aeolian saltation and small fragments produced have the potential for long distance transport as well as being within the size range for human respiration.
Collapse
Affiliation(s)
- Joanna E. Bullard
- Geography
and Environment, Loughborough University, Leicestershire LE11 3TU, U.K.
| | - Zhaoxia Zhou
- Loughborough
Materials Characterisation Centre, Department of Materials, Loughborough University, Leicestershire LE11 3TU, U.K.
| | - Sam Davis
- Loughborough
Materials Characterisation Centre, Department of Materials, Loughborough University, Leicestershire LE11 3TU, U.K.
| | - Shaun Fowler
- Loughborough
Materials Characterisation Centre, Department of Materials, Loughborough University, Leicestershire LE11 3TU, U.K.
| |
Collapse
|
33
|
Ding L, Guo X, Du S, Cui F, Zhang Y, Liu P, Ouyang Z, Jia H, Zhu L. Insight into the Photodegradation of Microplastics Boosted by Iron (Hydr)oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:17785-17794. [PMID: 36472936 DOI: 10.1021/acs.est.2c07824] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Iron (hydr)oxides as a kind of natural mineral actively participate in the transformation of organic pollutants, but there is a large knowledge gap in their impacts on photochemical processes of microplastics (MPs). This study is the first to examine the degradation of two ordinary plastic materials, polyethylene (PE) and polypropylene (PP), mediated by iron (hydr)oxides (goethite and hematite) under simulated solar light irradiation. Both iron (hydr)oxides significantly promoted the degradation of MPs (particularly PP) with a greater effect by goethite than hematite, related to hydroxyl radical (•OH) produced by iron (hydr)oxides. Under light irradiation, the surface Fe(II) phase catalyzed the production of H2O2 and promoted the release of Fe2+, leading to the subsequent light-driven Fenton reaction which produced a large amount of •OH. As the iron (hydr)oxides were modified with NaF at various concentrations, the activity of the surface Fe(II) as well as the release of Fe2+ were greatly reduced, and thus the •OH formation and MP degradation were depressed remarkably. It is worth noting that the surface hydroxyl groups (especially ≡FeOH) affected the reaction kinetics of •OH by regulating the activity of Fe species. These findings unveil the distinct impacts and intrinsic mechanisms of iron (hydr)oxides in influencing the photodegradation of MPs.
Collapse
Affiliation(s)
- Ling Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
- Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Shengwen Du
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Fengyi Cui
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yaping Zhang
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Peng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
- Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Zhuozhi Ouyang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
- Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Hanzhong Jia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
- Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Lingyan Zhu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
- Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| |
Collapse
|
34
|
Chen H, Chen Y, Xu Y, Xiao C, Liu J, Wu R, Guo X. Different functional areas and human activities significantly affect the occurrence and characteristics of microplastics in soils of the Xi'an metropolitan area. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158581. [PMID: 36075429 DOI: 10.1016/j.scitotenv.2022.158581] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/03/2022] [Accepted: 09/03/2022] [Indexed: 06/15/2023]
Abstract
Microplastics (MPs) pollution in the environment has become a global hotspot, but there is insufficient research on MPs in soils of large cities. This study investigated the pollution status of MPs in soils in different functional areas (commercial, tourist, industrial, and residential areas) of the Xi'an metropolitan area. The average abundances of MPs were 2218 items/kg in Xi'an city, 1329 items/kg in Xianyang city and 1400 items/kg in Yangling city. All MPs presented different shapes and were dominated by fragment and fiber. The 0-0.5 mm MPs accounted for the largest proportion. Polyethylene terephthalate (PET) was the predominant polymer type for MPs. The results showed that the soil in the Xi'an metropolitan area was polluted by MPs, with the pollution of MPs in Xi'an city being more severe than other two cities. This could be related to the advanced urbanization and industrialization process. Moreover, industrial and tourist areas had frequent industrial and human activities, so their MPs pollution was the worst. In addition, residential areas and some commercial areas far away from pollution sources had lower pollution levels and a more uniform distribution of MPs. This study may provide data and valuable reference for the investigation of soil MPs pollution in the Xi'an metropolitan area.
Collapse
Affiliation(s)
- Hao Chen
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanhua Chen
- Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Yibo Xu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chuanqi Xiao
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jincheng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Renren Wu
- State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control, South China Institute of Environmental Sciences, MEE, Guangzhou 510655, China.
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
35
|
He S, Wei Y, Yang C, He Z. Interactions of microplastics and soil pollutants in soil-plant systems. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 315:120357. [PMID: 36220572 DOI: 10.1016/j.envpol.2022.120357] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/27/2022] [Accepted: 10/01/2022] [Indexed: 06/16/2023]
Abstract
In recent years, increasing studies have been reported on characterization and detection of microplastics (MPs), and their interactions with organic pollutants (OPs) and heavy metals (HMs) in soils. However, a comprehensive review on the characteristics and factors that influence MPs distribution in soils, the sorption characteristics and mechanisms of soil contaminants by MPs, especially the interactions of MPs and their complexes with pollutants in the soil-plant systems remains rarely available at present. This review focuses on the sorption features and mechanisms of pollutants by MPs in soil and discussed the effects of MPs and their complexing with pollutants on soil properties, microbe and plants. The polarity of MPs significantly influenced the sorption of OPs, and different sorption mechanisms are involved for the hydrophobic and hydrophilic OPs. The sorption of OPs on MPs in soils is different from that in water. Aging of MPs can promote the sorption and migration of contaminants. The enhanced effects of biofilm in microplastisphere on the sorption of pollutants by MPs are critical, and interactions of soil environment-MPs-microbe-HMs-antibiotics increase the potential pathogens and larger release of resistance genes. The coexistence of HMs and MPs affected the growth of plants and the uptake of HMs and MPs by the plants. Moreover, the type, dose, shape and particle size of MPs have important influences on their interactions with pollutants and subsequent effects on soil properties, microbial activities and plant growth. This review also pointed out some knowledge gaps and constructive countermeasures to promote future research in this field.
Collapse
Affiliation(s)
- Shanying He
- College of Environmental Science and Engineering, Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310012, China.
| | - Yufei Wei
- College of Environmental Science and Engineering, Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou, Zhejiang, 310012, China
| | - Chunping Yang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, Key Laboratory of Petrochemical Pollution Control of Guangdong Higher Education Institutes, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong, 525000, China; College of Environmental Science and Engineering, Hunan University, and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministryof Education, Changsha, Hunan, 410082, China
| | - Zhenli He
- Department Soil and Water Sciences / Indian River Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Fort Pierce, Florida, 34945, USA
| |
Collapse
|
36
|
Liu H, Yue L, Zhao Y, Li J, Fu Y, Deng H, Feng D, Li Q, Yu H, Zhang Y, Ge C. Changes in bacterial community structures in soil caused by migration and aging of microplastics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 848:157790. [PMID: 35932870 DOI: 10.1016/j.scitotenv.2022.157790] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/18/2022] [Accepted: 07/30/2022] [Indexed: 06/15/2023]
Abstract
Microplastics (MPs) are classified as emerging pollutants and greatly threatens soil ecosystems. To determine the impact of microplastic migration on soil bacterial diversity, we conducted a 90-day indoor soil column simulation test. Soil and microplastic (granular polystyrene, polypropylene MPs) samples were collected from different soil layers on days 30, 60, and 90. The downward migration trend of MPs was obvious, and its surface functional groups, hydrophobic properties, and crystallinity changed. Bacterial diversity was significantly higher in the surrounding soil than on microplastic surfaces. Also, the topsoil has more bacterial diversity than the middle soil. A higher number of OTUs were detected on microplastic surfaces for the middle soil than in the topsoil. Proteobacteria abundance on microplastic surfaces in the topsoil gradually increased over the course of the experiment, while an opposite trend was observed for the middle soil. Nevertheless, Proteobacteria abundances in both layers were higher than in the surrounding soils. MPs alters the bacterial community composition of soils and provides unique substrates for colonization. The impacts of MPs on soil bacterial communities were better understood in this study. Our findings highlighted the relevance of MPs in soil ecosystems as well as the potential threats they pose.
Collapse
Affiliation(s)
- Huanyu Liu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Lin Yue
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Eco-Environmental Monitoring Center of Hainan Province, Haikou 570228, China
| | - Yuanyuan Zhao
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Jiatong Li
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Yan Fu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Hui Deng
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Dan Feng
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Guangzhou 510006, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Qipei Li
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Huamei Yu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Ying Zhang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China
| | - Chengjun Ge
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China.
| |
Collapse
|
37
|
Zhang Y, Wang K, Chen W, Ba Y, Khan K, Chen W, Tu C, Chen C, Xu L. Effects of land use and landscape on the occurrence and distribution of microplastics in soil, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157598. [PMID: 35878858 DOI: 10.1016/j.scitotenv.2022.157598] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/28/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Microplastic pollution in the soil environment has gathered widespread attention. However, little is known about the effects of land use and landscape patterns on the occurrence and distribution of microplastics in the soil. Herein, the microplastic pollution in different land uses (facility farmland, traditional farmland, orchard, grassland, and woodland) in Yuanmou County, Yunnan Province was investigated. The results showed that the abundance of microplastic ranged from 50.000 to 3450.0 items·kg-1, with an average abundance of 595.00 ± 740.00 items·kg-1 and a median of 375.00 items·kg-1. Microplastics were found to primarily be green-coloured (28.4 %), fragment (72.7 %) in shape, <1 mm (75.7 %) in size, and composed of polypropylene (51.4 %). There were significant differences in the abundance and characteristics of the microplastics between different land use types. Microplastic abundance in facility farmlands, traditional farmlands, and orchard lands was significantly higher than that of grasslands and woodlands (p < 0.05). The main shape of the microplastics in facility farmlands, traditional farmlands, and orchards was fragments and it was fibers in grasslands and woodlands. The median particle size of microplastics in facility farmlands (539.50 μm) and traditional farmlands (574.00 μm), was smaller than those in the orchard (737.60 μm), grasslands (697.60 μm), and woodlands (1239.4 μm). Discrepancies among different land uses may be due to various reasons, such as different pollution sources and the weathering degree of microplastics. The results of the redundancy analysis showed that the microplastic abundance was negatively correlated with the largest patch index. It also showed that microplastic pollution was closely related to human activities. This study provides an important basis for further research on microplastic ecosystem risks that are associated with land use and provides a data basis for formulating effective prevention and control strategies and measures to mitigate soil microplastic pollution.
Collapse
Affiliation(s)
- Ya Zhang
- Kunming Natural Resources Comprehensive Investigation Center, China Geological Survey, Kunming, Yunnan 650100, China
| | - Kang Wang
- Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Weizhi Chen
- Kunming Natural Resources Comprehensive Investigation Center, China Geological Survey, Kunming, Yunnan 650100, China
| | - Yong Ba
- Kunming Natural Resources Comprehensive Investigation Center, China Geological Survey, Kunming, Yunnan 650100, China
| | - Kifayatullah Khan
- Department of Environmental and Conservation Sciences, University of Swat, Swat 19130, Pakistan
| | - Wei Chen
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Chen Tu
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences. Nanjing 210008, China
| | - Changer Chen
- Environmental Research Institute/School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China
| | - Li Xu
- Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
| |
Collapse
|
38
|
Hu X, Feng X, Jiang C, Yang M. Photoaging and release profile of acrylonitrile butadiene styrene microplastics under simulated solar radiation in water. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 321:115997. [PMID: 35985266 DOI: 10.1016/j.jenvman.2022.115997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 08/03/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Microplastics (MPs) pollution has become a major environmental problem and poses a risk to a variety of organisms. In this study, the photoaging behavior of acrylonitrile butadiene styrene microplastics (ABS-MP) in aqueous environment was investigated under simulated solar irradiation. Results showed that the long chains of ABS-MP broke under the light irradiation, and its thermal stability was reduced. ABS-MP was oxidized during photoaging and produced a large number of oxygen-containing functional groups. Structure destruction of ABS-MP decreased the formation of environmentally persistent free radicals (EPFRs) and further photoirradiation generated secondary EPFRs. Nuclear magnetic resonance (NMR) analysis of the aged leachates confirmed that ABS-MP was oxidized and some small molecular fragments were dropped during photoaging. Meanwhile, C-Br bond broke of additive tetrabromobisphenol A (TBBPA) resulting in more bromine released into water and Sb(III) of additive Sb2O3 was oxidized to Sb(V) during photoaging. These findings illustrate the necessity of considering the aging of MPs in natural environment, expand the understanding of the potential harm and fate of MPs in aqueous environment, which is important for the management of MPs.
Collapse
Affiliation(s)
- Xuefeng Hu
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
| | - Xue Feng
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China
| | - Chaojie Jiang
- Hefei Genius Advanced Material Co.,Ltd., Hefei, 230601, China
| | - Mina Yang
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
| |
Collapse
|
39
|
Zuo Z, Wang Q, Zhang C, Zou J. Single and combined effects of microplastics and cadmium on juvenile grass carp (Ctenopharyngodon idellus). Comp Biochem Physiol C Toxicol Pharmacol 2022; 261:109424. [PMID: 35918021 DOI: 10.1016/j.cbpc.2022.109424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 07/05/2022] [Accepted: 07/27/2022] [Indexed: 11/16/2022]
Abstract
Microplastics (MPs) have received extensive attention as a new type of environmental pollutants with potential ecological risks. However, there are still few studies on the physiological stress response of aquatic organisms under the interaction of MPs and heavy metals. In this study, grass carp (Ctenopharyngodon idellus) were chosen as experimental fish and were exposed to 5 μm polystyrene microplastics (PS - MPs, 700 μg/L) and cadmium (Cd, 100 μg/L) individually or in combination. The results indicated that the presence of Cd didn't affect the accumulation of MPs in the intestines of grass carp. On the contrary, the concentration of Cd in the intestines of grass carp was higher in the MPs - Cd combined exposure group than in the Cd alone exposure group. Histological analysis revealed multiple abnormalities in the intestines after acute exposure, and the damage in the MPs - Cd combined exposure group was particularly severe. After 24 h of exposure, the expression of pro-inflammatory cytokines was significantly up-regulated in all exposed groups. However, after 48 h of exposure, the expression of inflammatory cytokines was significantly down-regulated, which may be related to intestinal damage. Our results deepen the significance of toxicological studies of MPs exposure, highlight their interaction with heavy metal toxicants, and provide important data for assessing the risk of MPs and heavy metals to grass carp.
Collapse
Affiliation(s)
- Zhiheng Zuo
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Qiujie Wang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Chaonan Zhang
- Department of Environmental Science, Zhejiang University, Hangzhou 310000, China
| | - Jixing Zou
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China.
| |
Collapse
|
40
|
Yang H, Yumeng Y, Yu Y, Yinglin H, Fu B, Wang J. Distribution, sources, migration, influence and analytical methods of microplastics in soil ecosystems. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 243:114009. [PMID: 36030682 DOI: 10.1016/j.ecoenv.2022.114009] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/19/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
Microplastics are ubiquitous in soil ecosystems all over the world through source and migration. It is even estimated that the content of microplastics in terrestrial ecosystems exceeds the number of microplastics entering sea ecosystems. However, compared with the research on microplastics in marine ecosystems, the research and discussion on microplastics in soil ecosystems are still less. Transportation, film mulching and sewage sludge are three main sources of soil microplastics. The abundance, polymer type, size and shape of the microplastics are related to the source and they help to clarify the source. The characteristics of microplastics, farming measures, soil animal activities and other factors promote the migration of microplastics, which bring new challenges to the soil ecosystems and humans. This article summarizes the latest research findings on the effects of soil microplasticity on soil properties, plants, animals and microorganisms. The analysis methods of microplastics in soil can refer to the analysis methods of microplastics of aquatic sediments, because soil and aquatic sediments are similar, both of which are complex solid substrates. At present, the development of analytical methods is limited due to the complex matrix of soil and the small volume of microplastics, which requires continuous development and innovation. Through the summary and analysis of related articles, this article reviews the distribution, sources, migration, influence and analysis methods of soil microplastics. This article also critically analyzes the deficiencies in the studies of microplastics in the soil ecosystems, and made some suggestions for future work. The microplastics in soil ecosystems need further research and summary, which will help people further understand the potential hazards of microplastics.
Collapse
Affiliation(s)
- Huirong Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China
| | - Yan Yumeng
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Youkai Yu
- Institute for Innovation and Entrepreneurship, Loughborough University, London E20 3BS, UK
| | - He Yinglin
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Bing Fu
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Jun Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 528478, China; Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning 530007, China.
| |
Collapse
|
41
|
Ding R, Ouyang F, Peng D, You J, Ding L, Ouyang Z, Liu P, Guo X. A case study of distribution and characteristics of microplastics in surface water and sediments of the seas around Shenzhen, southern coastal area of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156063. [PMID: 35597363 DOI: 10.1016/j.scitotenv.2022.156063] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/05/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Microplastics (MPs), known to cause environmental pollution, is attracting a growing attention worldwide owing to their extensive existence and potential risks to biota. The marginal sea areas are suspected to be especially susceptible to MPs pollution. Unfortunately, data on MPs in the surface water and sediments ecosystems are still limited, particularly in the southern coastal areas of China. The study was successfully utilized to explore the distribution and characteristics of MPs below 5 mm collected from 14 sites in the seas around Shenzhen, a typical special economic zone of China. MPs were detected in both surface water and sediments with concentrations ranging from 3.8 to 7.8 items per liter and 2.6 × 103 to 10.0 × 103 items per kilogram, respectively. The highest abundance of MPs appeared in S5/S9 and S14 in surface water and sediments, respectively. Fiber and film with small particle size (<0.5 mm) were identified as typical and abundant MPs type among all samples. In addition, polyethylene (PE) was considered as dominant forms of MPs in surface water and sediment samples. Results from this study indicated a positive correlation with abundance of MPs and urbanization rate, which also showed an evident difference of MPs in different urban functional areas. Based on the types and quantity of detected MPs, we assessed the risk of MPs pollution in this study area, and the ecological risk category of MPs was at a high level. Importantly, our work might be employed as a potential information so as to better understand MPs pollution, source tracing and ecological risk assessment, which enhances the possibility of achieving effective control and supervision of MPs pollution in southern coastal aera of China.
Collapse
Affiliation(s)
- Rui Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Fan Ouyang
- Department of Transportation and Environment, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China
| | - Dan Peng
- Department of Transportation and Environment, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China.
| | - Jia You
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Ling Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Zhuozhi Ouyang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Peng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
42
|
Wang W, Do ATN, Kwon JH. Ecotoxicological effects of micro- and nanoplastics on terrestrial food web from plants to human beings. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155333. [PMID: 35452728 DOI: 10.1016/j.scitotenv.2022.155333] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/11/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Micro- and nanoplastics (MNPs) are present in almost all environmental compartments. Terrestrial soils are major environmental reservoirs for MNPs, but the ecotoxicological effects of MNPs on terrestrial biota remain relatively understudied. In this review, we collated findings of previous research on the uptake and impact of MNPs in terrestrial organisms, including flora, fauna, and human beings. Terrestrial plants can take up MNPs via the roots or leaves and translocate them to other parts. MNPs have been detected in the gastrointestinal tracts or feces of many terrestrial animals, including some high trophic-level predators, indicating the incidence of direct ingestion or trophic transfer of MNPs. The presence of MNPs in food items and human feces combines to verify human intake of MNPs via the dietary pathway. Exposure to MNPs can cause diverse effects on terrestrial organisms, including alterations in growth performance, oxidative stress, metabolic disturbance, cytotoxicity, genotoxicity, and mortality. The biological internalization and impact of MNPs are influenced by the physicochemical properties of MNPs (e.g., particle size, polymer type, surface chemistry, and exposure concentrations) and the physiology of the species. MNPs can also affect the bioavailability of co-occurring intrinsic or extrinsic contaminants to terrestrial biota, but their specific role is under dispute. Finally, we underlined the current research gaps and proposed several priorities for future studies.
Collapse
Affiliation(s)
- Wenfeng Wang
- Division of Environmental Science and Ecological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Anh T Ngoc Do
- Division of Environmental Science and Ecological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jung-Hwan Kwon
- Division of Environmental Science and Ecological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| |
Collapse
|
43
|
Zhang Z, Zhao S, Chen L, Duan C, Zhang X, Fang L. A review of microplastics in soil: Occurrence, analytical methods, combined contamination and risks. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119374. [PMID: 35490998 DOI: 10.1016/j.envpol.2022.119374] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/29/2022] [Accepted: 04/25/2022] [Indexed: 06/14/2023]
Abstract
Microplastics (MPs) pollution is becoming a serious environmental issue of global concern. Currently, the effects of MPs on aquatic ecosystems have been studied in detail and in depth from species to communities. However, soils, the largest reservoir of MPs, have been less studied, and little is known about the occurrence, environmental fate and ecological impacts of MPs. Therefore, based on the existing knowledge, this paper firstly focused specifically on the main sources of soil MPs pollution and explored the main reasons for their strong heterogeneity in spatial distribution. Secondly, as a primary prerequisite for evaluating MPs contamination, we systematically summarized the analytical methods for soil MPs and critically compared the advantages and disadvantages of the different methods in the various operational steps. Furthermore, this review highlighted the combined contamination of MPs with complex chemical contaminants, the sorption mechanisms and the associated factors in the soil. Finally, the risks posed by MPs to soil, plants, the food chain and even humans were outlined, and future directions for soil MPs research were proposed, while the urgent need for a unified approach to MPs extraction and identification was emphasized. This study provides a theoretical reference for a comprehensive understanding of the separation of soil MPs and their ecological risk as carriers of pollution.
Collapse
Affiliation(s)
- Zhiqin Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Shuling Zhao
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Li Chen
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chengjiao Duan
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xingchang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Linchuan Fang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China.
| |
Collapse
|
44
|
Wu S, Chen Z, Zhou M, Shao Y, Jin C, Tang J, Fang F, Guo J, Stibany F, Schäffer A. Freeze-thaw alternations accelerate plasticizers release and pose a risk for exposed organisms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 241:113742. [PMID: 35679726 DOI: 10.1016/j.ecoenv.2022.113742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/29/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
The application of plastic mulch films brings convenience to agricultural production, but also causes plastic waste that can be degraded into microplastics (MPs). However, little is known about the fate of plastic waste in agricultural ecosystem under freeze-thaw alternation in middle and high latitudes, as well as in highlands around the world. Whether the release of plasticizers, i.e. phthalate esters (PAEs), under such conditions would pose a potential risk to exposed organisms due to bioaccumulation is also unknown. To fill these data gaps, the agricultural fields in Liaoning of China with typical freeze-thaw alternation was selected as the study area. The transformation of plastic film was demonstrated by simulation freeze-thaw alternating from -30 to 20 ℃. Soil samples were collected to investigate the patterns of MP composition, abundance, and distribution. Concurrently, the concentrations of two PAEs including bis(2-ethylhexyl) phthalate (DEHP) and diethyl phthalate (DEP) in soils were analyzed to provide information on the correlation between MPs abundance and PAEs concentrations as well as potential risks. The results showed that freeze-thaw alternating can accelerate the formation of MPs and release of PAEs from plastic waste. The abundance of MPs was positively correlated with the concentration of PAEs. Soil PAEs ranged from 3268 ± 213-6351 ± 110 μg/kg, indicating that over 40 % of the PAEs were transferred from plastic films to soils. Such residual amounts could pose risk for exposed organisms. Hence, the current study suggested that special concerns should be given to the release plasticizers in plastic waste of agricultural soils.
Collapse
Affiliation(s)
- Siqi Wu
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China
| | - Zhongli Chen
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China
| | - Min Zhou
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China
| | - Ying Shao
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China.
| | - Chao Jin
- Chongqing Beibei District Ecological Environment Bureau, Chongqing City, Chongqing 400700, China
| | - Jinjing Tang
- Analytical and Testing Center of Chongqing University, Chongqing 400030, China
| | - Fang Fang
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China
| | - Jinsong Guo
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China
| | - Felix Stibany
- Institute for Environmental Research, RWTH Aachen University, Aachen 52074, Germany
| | - Andreas Schäffer
- Key Laboratory of the Ministry of Education for the Ecological Environment of the Three Gorges Reservoir Area, Chongqing University, Chongqing 400030, China; Institute for Environmental Research, RWTH Aachen University, Aachen 52074, Germany; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China
| |
Collapse
|
45
|
Xi B, Wang B, Chen M, Lee X, Zhang X, Wang S, Yu Z, Wu P. Environmental behaviors and degradation methods of microplastics in different environmental media. CHEMOSPHERE 2022; 299:134354. [PMID: 35306053 DOI: 10.1016/j.chemosphere.2022.134354] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 02/21/2022] [Accepted: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Microplastics, as a group of emerging contaminants, are widely present in environmental media and have the potential to endanger the ecological environment and human health. Due to the inconsistencies and difficulties inherent in the analysis of microplastic particles, global monitoring data on the distribution of microplastics in the environment are still far from sufficient. The fate and migration of microplastics in the environment are also uncertain. Therefore, there have been increasing reviews on the distribution, biological effects, migration, and health risks of microplastics. However, reports focusing on the degradation of microplastics are still rare. Understanding and commanding the environmental behavior of microplastics are of great significance to explore the treatment of microplastic pollution. Although some preliminary studies on microplastics have been carried out, there is still an urgent need to conduct a comprehensive study on environmental behaviors and degradation methods of microplastics in different environmental media. This article summarizes the recent advances on microplastics, basically includes the distribution and ecological impact of microplastics in soil and water environments, then elaborates the migration behavior and influencing factors of microplastics, and focuses on the research progress of microplastics degradation methods. On this basis, the problems existing in the current research and the future development directions have been proposed. This review could provide a more systematic reference for the development and research of microplastics in the future.
Collapse
Affiliation(s)
- Binbin Xi
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China
| | - Bing Wang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang, Guizhou 550025, China.
| | - Miao Chen
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang, Guizhou 550025, China
| | - Xinqing Lee
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, China
| | - Xueyang Zhang
- School of Environmental Engineering, Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, Xuzhou University of Technology, Xuzhou 221018, China
| | - Shengsen Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Zebin Yu
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Panfeng Wu
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| |
Collapse
|
46
|
Zhang M, Liu L, Xu D, Zhang B, Li J, Gao B. Small-sized microplastics (< 500 μm) in roadside soils of Beijing, China: Accumulation, stability, and human exposure risk. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 304:119121. [PMID: 35304176 DOI: 10.1016/j.envpol.2022.119121] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/27/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
The potential threats of microplastics (MPs) to human health in urban environment have received increasing attention. Small MPs substantially threaten soil organisms and human beings because they are easily ingested and may adsorb other pollutants to form composite compounds. However, roadside soils as a source and a sink of small MPs in urban environments have not been reported. Here, we studied the small-sized MPs (SMPs, < 500 μm) pollution and human exposure analysis by investigating the MPs in roadside soils in Beijing. SMPs contributed to 88.06% of the high average MPs abundance (22001.67 ± 24482.34 items/kg), and were categorized as uncontaminated to moderately contaminated, assessed by the geo-accumulation index (Igeo). SMPs mainly consisted of polypropylene (PP) and polyethylene (PE) with morphotypes of fragment and granule. In particular, highly stable and fragmented MPs were discovered by the conditional fragmentation model. And normal-sized MPs (NMPs 500-5000 μm) NMPs could further fragment into SMPs, indicating that SMPs in roadside soil were further enriched. The estimated infant exposure to SMPs was greater than that in adults, and independent of the polymer types and morphotypes. PP is currently the main pollutant, contributing 65% to the estimated human exposure. Combining the conditional fragmentation model and main polymer types, SMPs likely derived from containers/packaging and fertilizers, and affected by atmospheric transport. This study demonstrated the dominance and potential risk of SMPs in roadside soil, suggesting that health risk assessment for SMPs in urban environment necessitates critical investigation.
Collapse
Affiliation(s)
- Mengyu Zhang
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Linghua Liu
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Dongyu Xu
- Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Baohao Zhang
- Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Jinjin Li
- Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Bo Gao
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
| |
Collapse
|
47
|
Li J, Peng D, Ouyang Z, Liu P, Fang L, Guo X. Occurrence status of microplastics in main agricultural areas of Xinjiang Uygur Autonomous Region, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154259. [PMID: 35278564 DOI: 10.1016/j.scitotenv.2022.154259] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 02/10/2022] [Accepted: 02/27/2022] [Indexed: 06/14/2023]
Abstract
A large number of plastic products are used in the process of agricultural production, and the recycling efficiency is low, which leads to the production of a large number of microplastics. Therefore, the microplastic contamination in agricultural areas requires being investigated urgently. In addition, the occurrence characteristics of microplastics are also different in agricultural areas with various land use modes. In this study, the main agricultural areas in Xinjiang are taken as the research object. The abundance of microplastics in the main agricultural areas in Xinjiang ranges from 288 to 1452 items/kg. The shape of microplastics is mainly bulks, and white microplastics account for the highest proportion, and the majority of their sizes are less than 0.5 mm. The risk assessment results show that the contamination risk index of microplastics in this area is 108.92 and the risk level is grade III. The research shows that there is little difference in the abundance of microplastics between paddy field and garden land, which may be because there are few sources of microplastics in the land of these two utilization modes, and the potential pollution sources are similar, such as the atmospheric deposition of microplastics, the falling of fibers on people's clothes during farming, and the agricultural use of sludge. This study can provide a reference for further study on the existing circumstances of microplastics in agricultural areas.
Collapse
Affiliation(s)
- Jianlong Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dan Peng
- Department of Transportation and Environment, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China.
| | - Zhuozhi Ouyang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Peng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Linchuan Fang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, Yangling 712100, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
48
|
Liu H, Wang X, Shi Q, Liu Y, Lei H, Chen Y. Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 303:119162. [PMID: 35307499 DOI: 10.1016/j.envpol.2022.119162] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 03/12/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Although microplastic pollution in the soil environment is currently an important research topic, few studies have focused on farmland soil in arid regions. This study investigated the abundances, sizes, polymer compositions, and forms of microplastics across nine agricultural plots cultivated with maize, sunflower, and potato (three of each crop) plants to determine the influences of different cropping characteristics and agricultural practices. The study area was within the arid region of the Ulungur River basin in Qinghe County, Altay, Xinjiang, China. The main forms of microplastics were fragments and fibers, and polyethylene was the dominant polymer (91.6%). The microplastic abundance ranged from 11 347 items/kgdw to 78 061 items/kgdw (mean of 52 081.7 items/kgdw). The abundance and proportion of microplastics with a diameter of <0.2 mm were significantly higher in the sunflower and maize plots (i.e., tall crops) than in the potato plots (i.e., short crops) (p < 0.05). This is due to straw residues affecting the migration and recovery of the mulch. The abundance and fragmentation of microplastics were significantly higher in the sunflower and maize plots where plastic mulch was extensively used because these tall crops anchored the mulch near their stem-root systems. The mulch was then slowly aged (e.g., via wind erosion) before being fragmented due to agricultural practices (e.g., mechanical plowing and residue retention). Although microplastics sourced from mulch are probably immobilized by straw residues in the short term, fragile and easily broken pieces of mulch are eventually released into the soil due to agricultural practices. The findings suggest that different cropping characteristics can affect the abundance and fragmentation of microplastics in agricultural soils, even within the same region, and thus the level and type of microplastic pollution. Traditional plastic mulch should be replaced with biodegradable mulch to reduce microplastic pollution in agricultural fields.
Collapse
Affiliation(s)
- Hao Liu
- College of Resources and Environmental Sciences, Xinjiang University, Urumqi, 830046, China; Institute of Arid Ecology and Environment, Xinjiang University, Urumqi, 830046, China.
| | - Xiyuan Wang
- College of Resources and Environmental Sciences, Xinjiang University, Urumqi, 830046, China; Institute of Arid Ecology and Environment, Xinjiang University, Urumqi, 830046, China.
| | - Qingdong Shi
- College of Resources and Environmental Sciences, Xinjiang University, Urumqi, 830046, China; Institute of Arid Ecology and Environment, Xinjiang University, Urumqi, 830046, China
| | - Yuying Liu
- College of Resources and Environmental Sciences, Xinjiang University, Urumqi, 830046, China; Institute of Arid Ecology and Environment, Xinjiang University, Urumqi, 830046, China
| | - Haifeng Lei
- College of Resources and Environmental Sciences, Xinjiang University, Urumqi, 830046, China; Institute of Arid Ecology and Environment, Xinjiang University, Urumqi, 830046, China
| | - Yutong Chen
- College of Resources and Environmental Sciences, Xinjiang University, Urumqi, 830046, China; Institute of Arid Ecology and Environment, Xinjiang University, Urumqi, 830046, China
| |
Collapse
|
49
|
Ding L, Luo Y, Yu X, Ouyang Z, Liu P, Guo X. Insight into interactions of polystyrene microplastics with different types and compositions of dissolved organic matter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153883. [PMID: 35182636 DOI: 10.1016/j.scitotenv.2022.153883] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/26/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Microplastics (MPs), as newly emerging pollutants, may interact with dissolved organic matter (DOM) widely present in the environment after entering the environment, thereby influencing the migration and transformation of MPs. The interaction characteristics and mechanism between DOM and MPs are restricted by many factors, and the current mechanism remains unclear. Thus, we explored the combination of MP with different types and compositions of DOM (fulvic acid (FA) and humic acid (HA)). Adsorption experiments revealed that MP has high adsorption affinity for all four DOMs, particularly FA. Meanwhile, the affinity of MP-DOM was also examined using excitation-emission matrix (EEM) analyses and fluorescence quenching method (excitation emission matrix-parallel factor analysis (EEM-PARAFAC)). Aromatic substances and hydrophobic substances dominate all DOM samples. For all DOM types tested, the quenching curve varies considerably with the type and compositions of DOM. In addition, three fluorescent components exhibited significant fluorescence quenching over time. The interaction mechanism of MPs and DOM at the molecular level was further elucidated by utilizing two-dimensional (2D) Fourier transformation infrared (FTIR) correlation spectroscopy (COS) analysis, which revealed that the oxygen-containing functional group in MPs was the most preferred DOM binding structure. This work was facilitated to explore the environmental behavior of MPs and formation of secondary MPs under natural conditions.
Collapse
Affiliation(s)
- Ling Ding
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuanyuan Luo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaoqin Yu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhuozhi Ouyang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Peng Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
| |
Collapse
|
50
|
Yang H, Dong H, Huang Y, Chen G, Wang J. Interactions of microplastics and main pollutants and environmental behavior in soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 821:153511. [PMID: 35101494 DOI: 10.1016/j.scitotenv.2022.153511] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/25/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Microplastics (MPs) are emerging global contaminants, attracting more and more attention because of their difficulty in degradation, extensive and persistent pollution. In freshwater environment, especially in the ocean, they have become a global, public and even political research hotspot. However, the distribution, fate and ecological hazards of MPs in agricultural land and other soils have not been explored fully. Although the occurrence of MPs in different habitats has been reviewed at home and abroad, little attention has been paid to its environmental behavior, ecotoxicology and interaction with biological and chemical pollutants in soil. This review summaries the research progress on the source, accumulation, degradation and migration of MPs in soil, the potential risks of ecological environment and food chain. In order to provide theoretical basis and practical suggestions for related research and regulatory countermeasures, the detection and treatment methods and mechanism of microplastics in soil need to be further explored.
Collapse
Affiliation(s)
- Huirong Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Han Dong
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Yurou Huang
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Guanglong Chen
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Jun Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510006, China; Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning 530007, China.
| |
Collapse
|