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Gao S, Zhang S, Feng Z, Lu J, Fu G, Yu W. The ecological risk and fate of microplastics in the environmental matrices of marine ranching area in coastal water. JOURNAL OF HAZARDOUS MATERIALS 2024; 473:134570. [PMID: 38772105 DOI: 10.1016/j.jhazmat.2024.134570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/23/2024]
Abstract
The debate surrounding "source" and "sink" of microplastics (MPs) in coastal water has persisted for decades. While the transportation of MPs is influenced by surface runoff and currents, the precise transport patterns remain inadequately defined. In this study, the typical coastal habitat - marine ranching in Haizhou Bay (Jiangsu Province, China) were selected as a case study to assess the ecological risk of MPs. An enhanced framework was employed to assess the entire community characteristics of MPs in various environmental compartments, including surface water (SW), middle water (MW), bottom water (BW), sea bottom sediment (SS), and intertidal sediment (IS). The results of the assessment showed a low risk in the water column and a high risk in the sediment. PERMANOVA based on size and polymer of MPs revealed significant differences between IS and other compartments (SW, MW, BW, and SS) (P < 0.001). The co-occurrence network analysis for MP size indicated that most sites occupied central positions, while the analysis for MP polymer suggested that sites near the marine ranching area held more central positions, with sites in MW, BW, and SS being somewhat related to IS. Generalized additive model (GAM) demonstrated that MP concentration in the water correlated with Chla and nutrients, whereas MPs in sediment exhibited greater susceptibility to dissolved oxygen (DO) and salinity. We believe that except for the natural sedimentation and re-suspension of MPs in the vertical direction, MPs in bottom water may migrate to the surface water due to upwelling mediated by artificial reefs. Additionally, under the combined influence of surface runoff, currents, and tides, MPs may migrate horizontally, primarily occurring between middle and bottom water and sediments. The study recommends limiting and reducing wastewater and sewage discharge, as well as regulating fishing and aquaculture activities to control the sources and sinks of MPs in coastal water. Moreover, it advocates the implementation and strengthening of marine monitoring activities to gain a better understanding of the factors driving MP pollution in marine ranching area.
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Affiliation(s)
- Shike Gao
- College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China; Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan
| | - Shuo Zhang
- College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China; Joint Laboratory for Monitoring and Conservation of Aquatic Living Resources In the Yangtze Estuary, Shanghai 200000, China.
| | - Zhihua Feng
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China.
| | - Jikun Lu
- Marine and Fishery Development Promotion Center In Lianyungang, Lianyungang 222002, Jiangsu, China
| | - Guanghui Fu
- Marine and Fishery Development Promotion Center In Lianyungang, Lianyungang 222002, Jiangsu, China
| | - Wenwen Yu
- Jiangsu Research Institute of Marine Fisheries, Nantong 226007, China
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2
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Li Z, Xian H, Ye R, Zhong Y, Liang B, Huang Y, Dai M, Guo J, Tang S, Ren X, Bai R, Feng Y, Deng Y, Yang X, Chen D, Yang Z, Huang Z. Gender-specific effects of polystyrene nanoplastic exposure on triclosan-induced reproductive toxicity in zebrafish (Danio rerio). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 932:172876. [PMID: 38692326 DOI: 10.1016/j.scitotenv.2024.172876] [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: 12/07/2023] [Revised: 02/20/2024] [Accepted: 04/27/2024] [Indexed: 05/03/2024]
Abstract
Nanoplastics (NPs) and triclosan (TCS) are ubiquitous emerging environmental contaminants detected in human samples. While the reproductive toxicity of TCS alone has been studied, its combined effects with NPs remain unclear. Herein, we employed Fourier transform infrared spectroscopy and dynamic light scattering to characterize the coexposure of polystyrene nanoplastics (PS-NPs, 50 nm) with TCS. Then, adult zebrafish were exposed to TCS at environmentally relevant concentrations (0.361-48.2 μg/L), with or without PS-NPs (1.0 mg/L) for 21 days. TCS biodistribution in zebrafish tissues was investigated using ultra-performance liquid chromatography coupled with triple quadrupole mass spectrometry. Reproductive toxicity was assessed through gonadal histopathology, fertility tests, changes in steroid hormone synthesis and gene expression within the hypothalamus-pituitary-gonad-liver (HPGL) axis. Transcriptomics and proteomics were applied to explore the underlying mechanisms. The results showed that PS-NPs could adsorb TCS, thus altering the PS-NPs' physical characteristics. Our observations revealed that coexposure with PS-NPs reduced TCS levels in the ovaries, livers, and brains of female zebrafish. Conversely, in males, coexposure with PS-NPs increased TCS levels in the testes and livers, while decreasing them in the brain. We found that co-exposure mitigated TCS-induced ovary development inhibition while exacerbated TCS-induced spermatogenesis suppression, resulting in increased embryonic mortality and larval malformations. This co-exposure influenced the expression of genes linked to steroid hormone synthesis (cyp11a1, hsd17β, cyp19a1) and attenuated the TCS-decreased estradiol (E2) in females. Conversely, testosterone levels were suppressed, and E2 levels were elevated due to the upregulation of specific genes (cyp11a1, hsd3β, cyp19a1) in males. Finally, the integrated analysis of transcriptomics and proteomics suggested that the aqp12-dctn2 pathway was involved in PS-NPs' attenuation of TCS-induced reproductive toxicity in females, while the pck2-katnal1 pathway played a role in PS-NPs' exacerbation of TCS-induced reproductive toxicity in males. Collectively, PS-NPs altered TCS-induced reproductive toxicity by disrupting the HPGL axis, with gender-specific effects.
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Affiliation(s)
- Zhiming Li
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Hongyi Xian
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Rongyi Ye
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Yizhou Zhong
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Boxuan Liang
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Yuji Huang
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Mingzhu Dai
- Hunter Biotechnology, Inc., Hangzhou 310051, China
| | - Jie Guo
- Hunter Biotechnology, Inc., Hangzhou 310051, China
| | - Shuqin Tang
- College of Environment and Climate, Guangdong Provincial Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Xiaohu Ren
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Ruobing Bai
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Yu Feng
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Yanhong Deng
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Xingfen Yang
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Da Chen
- College of Environment and Climate, Guangdong Provincial Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China
| | - Zhu Yang
- State Key Laboratory of Environmental and Biological Analysis, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Department of Biology, Hong Kong Baptist University, 999077, Hong Kong Special Administrative Region, China
| | - Zhenlie Huang
- NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Toxicology, School of Public Health, Southern Medical University, Guangzhou 510515, China; Department of Cardiovascular Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China.
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3
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Ramljak A, Žučko J, Lučić M, Babić I, Morić Z, Fafanđel M, Furdek Turk M, Matijević S, Karpouzas D, Udiković-Kolić N, Petrić I. Microbial communities as indicators of marine ecosystem health: Insights from coastal sediments in the eastern Adriatic Sea. MARINE POLLUTION BULLETIN 2024; 205:116649. [PMID: 38944966 DOI: 10.1016/j.marpolbul.2024.116649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 05/27/2024] [Accepted: 06/21/2024] [Indexed: 07/02/2024]
Abstract
Considering the adaptability and responsiveness of microorganisms to environmental changes, their indicator potential is still not acknowledged in European directives. This comprehensive study examined the changes of microbial communities in sediments and a range of geochemical parameters from pristine and anthropogenically impacted coastal areas in the eastern Adriatic Sea. Various analytical methods found evidence of sediment contamination (high toxicity level, enrichments of metals, tributyltin) in certain areas, leading to the categorization of sediments based on the level of anthropogenic disturbance. Prokaryotes were identified as the most promising group of microbes for further research, with specific bacterial families (Rhodobacteraceae, Ectothiorhodospiraceae, Cyclobacteriaceae) and genera (Boseongicola, B2M28, Subgroup 23, Sva0485, Thiogranum) proposed as potential indicators of environmental status. Finally, predictive models were developed to identify key indicator variables for assessing anthropogenic impact in sediments. This research represents an essential step toward incorporating microbial communities into assessments of benthic environmental health.
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Affiliation(s)
- A Ramljak
- Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - J Žučko
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - M Lučić
- Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - I Babić
- Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Z Morić
- Department of Computer Science, Algebra University, Gradišćanska 24, 10000 Zagreb, Croatia
| | - M Fafanđel
- Center for Marine Research, Ruđer Bošković Institute, Giordano Paliaga 5, 52210 Rovinj, Croatia
| | - M Furdek Turk
- Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - S Matijević
- Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia
| | - D Karpouzas
- Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, 41221 Larissa, Greece
| | - N Udiković-Kolić
- Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - I Petrić
- Division for Marine and Environmental Research, Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
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4
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Alvarado-Zambrano D, Rivera-Hernández JR, Green-Ruiz C. Macroplastic and Microparticle Pollution in Beach Sediments from Urias Coastal Lagoon (Northwest Mexico). TOXICS 2024; 12:439. [PMID: 38922119 PMCID: PMC11209155 DOI: 10.3390/toxics12060439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 06/27/2024]
Abstract
This study investigates the occurrence and characteristics of macroplastic and polymer microparticles in the Urias coastal lagoon's beach sediments, in northwest Mexico. Coastal lagoons, productive and vulnerable ecosystems, are impacted significantly by anthropogenic activities, leadings to their pollution by various contaminants, including plastics. Our research involved sampling sediments from four sites within the lagoon that were influenced by different human activities such as fishing, aquaculture, thermoelectric power plant operations, industrial operations, and domestic wastewater discharge. Our methodology included collecting macroplastics and beach sediment samples, followed by laboratory analyses to identify the plastic debris' size, shape, color, and chemical composition. The results indicated a notable presence of macroplastic items (144), predominantly bags, styrofoam, and caps made of polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). The polymer microparticles were mainly fibers, with cotton and polyester as the most common polymers, suggesting a significant contribution from clothing-related waste. The dominant colors of the microparticles were blue and transparent. High densities were observed in areas with slower water exchange. Our findings highlight the urgent need for better waste management practices to mitigate plastic pollution in coastal lagoons, preserving their ecological and economic functions.
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Affiliation(s)
- Daniela Alvarado-Zambrano
- Engineering in Environmental Technology, Polytechnic University of Sinaloa, Km 3. Carretera Municipal Libre Mazatlan Higueras, Mazatlan 82199, Sinaloa, Mexico;
| | - José R. Rivera-Hernández
- Mazatlan Academic Unit, Marine Sciences and Limnology Institute, Universidad Nacional Autónoma de México, Cap. Joel Montes Camarena, Mazatlan 82047, Sinaloa, Mexico;
| | - Carlos Green-Ruiz
- Mazatlan Academic Unit, Marine Sciences and Limnology Institute, Universidad Nacional Autónoma de México, Cap. Joel Montes Camarena, Mazatlan 82047, Sinaloa, Mexico;
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5
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De Rinaldis G, Pastorino P, Scirocco T, Sacchetti C, Anselmi S, Provenza F, Renzi M, Specchiulli A. Navigating a Microplastic Sea: How the Pacific Cupped Oyster ( Magallana gigas) Respond to Microplastic Pollution in Lagoons. TOXICS 2024; 12:429. [PMID: 38922109 PMCID: PMC11209222 DOI: 10.3390/toxics12060429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/27/2024] [Accepted: 06/10/2024] [Indexed: 06/27/2024]
Abstract
Microplastic pollution poses an escalating concern, particularly in coastal lagoons rich in biodiversity. This study delved into the occurrence of microplastics (MPs) in Magallana gigas (formerly Crassostrea gigas) from the Orbetello and Varano coastal lagoons (Italy), also investigating the response of these filter-feeding organisms to various colors (P = pink; B = blue; W = white) of high-density polyethylene (HDPE) MP fragments. Oysters were exposed for 7 days under controlled conditions. Subsequently, the oysters underwent analysis for both MP presence and biochemical markers of oxidative stress. Diverse ingestion rates of HDPE were noted among oysters from the two lagoons, eliciting antioxidant responses and modifying baseline activity. The two-way ANOVA revealed the significant effects of treatment (control; HDPE_B; HDPE_P; HDPE_W), site, and the interaction between treatment and site on all biomarkers. Non-metric multidimensional scaling showed a divergent effect of HDPE color on biomarkers. Further investigation is warranted to elucidate the mechanisms underlying the influence of MP color, dose-dependent effects, and the long-term impacts of exposure. Comprehending these intricacies is imperative for devising effective strategies to mitigate plastic pollution and safeguard marine health.
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Affiliation(s)
- Gianluca De Rinaldis
- National Research Council, Institute of Nanotechnology (NANOTEC), 73100 Lecce, Italy;
| | - Paolo Pastorino
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d′Aosta, 10154 Torino, Italy
| | - Tommaso Scirocco
- National Research Council—Institute for Marine Biological Resources and Biotechnology (IRBIM), 71010 Lesina, Italy; (T.S.); (C.S.); (M.R.)
| | - Claudia Sacchetti
- National Research Council—Institute for Marine Biological Resources and Biotechnology (IRBIM), 71010 Lesina, Italy; (T.S.); (C.S.); (M.R.)
| | - Serena Anselmi
- Bioscience Research Center, Via Aurelia Vecchia 32, 58015 Orbetello, Italy; (S.A.); (F.P.)
| | - Francesca Provenza
- Bioscience Research Center, Via Aurelia Vecchia 32, 58015 Orbetello, Italy; (S.A.); (F.P.)
| | - Monia Renzi
- National Research Council—Institute for Marine Biological Resources and Biotechnology (IRBIM), 71010 Lesina, Italy; (T.S.); (C.S.); (M.R.)
- Department of Life Science, University of Trieste, 34127 Trieste, Italy
| | - Antonietta Specchiulli
- National Research Council—Institute for Marine Biological Resources and Biotechnology (IRBIM), 71010 Lesina, Italy; (T.S.); (C.S.); (M.R.)
- National Biodiversity Future Center (NBFC), 90133 Palermo, Italy
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6
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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.
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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.
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7
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Islam ARMT, Hasan M, Sadia MR, Mubin AN, Ali MM, Senapathi V, Idris AM, Malafaia G. Unveiling microplastics pollution in a subtropical rural recreational lake: A novel insight. ENVIRONMENTAL RESEARCH 2024; 250:118543. [PMID: 38417661 DOI: 10.1016/j.envres.2024.118543] [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: 09/16/2023] [Revised: 02/01/2024] [Accepted: 02/22/2024] [Indexed: 03/01/2024]
Abstract
While global attention has been primarily focused on the occurrence and persistence of microplastics (MP) in urban lakes, relatively little attention has been paid to the problem of MP pollution in rural recreational lakes. This pioneering study aims to shed light on MP size, composition, abundance, spatial distribution, and contributing factors in a rural recreational lake, 'Nikli Lake' in Kishoreganj, Bangladesh. Using density separation, MPs were extracted from 30 water and 30 sediment samples taken from ten different locations in the lake. Subsequent characterization was carried out using a combination of techniques, including a stereomicroscope, Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FE-SEM). The results showed a significant prevalence of MPs in all samples, with an average amount of 109.667 ± 10.892 pieces/kg3 (dw) in the sediment and 98.167 ± 12.849 pieces/m3 in the water. Small MPs (<0.5 mm), fragments and transparent colored particles formed the majority, accounting for 80.2%, 64.5% and 55.3% in water and 78.9%, 66.4% and 64.3% in sediment, respectively. In line with global trends, polypropylene (PP) (53%) and polyethylene (PE) (43%) emerged as the predominant polymers within the MPs. MP contents in water and sediment showed positive correlations with outflow, while they correlated negatively with inflow and lake depth (p > 0.05). Local activities such as the discharge of domestic sewage, fishing waste and agricultural runoff significantly influence the distribution of polypropylene. Assessment of pollution factor, pollution risk index and pollution load index values at the sampling sites confirmed the presence of MPs, with values above 1. This study is a baseline database that provides a comprehensive understanding of MP pollution in the freshwater ecosystem of Bangladesh, particularly in a rural recreational lake. A crucial next step is to explore ecotoxicological mechanisms, legislative measures and future research challenges triggered by MP pollution.
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Affiliation(s)
- 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.
| | - Moriom Rahman Sadia
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh.
| | - Al-Nure Mubin
- Department of Disaster Management, Begum Rokeya University, Rangpur 5400, Bangladesh.
| | - Mir Mohammad Ali
- Department of Aquaculture, Sher - e - Bangla Agricultural University, Dhaka 1207, 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, 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.
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8
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Boukadida K, Mlouka R, Abelouah MR, Chelly S, Romdhani I, Conti GO, Ferrante M, Cammarata M, Parisi MG, AitAlla A, Banni M. Unraveling the interplay between environmental microplastics and salinity stress on Mytilus galloprovincialis larval development: A holistic exploration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172177. [PMID: 38575005 DOI: 10.1016/j.scitotenv.2024.172177] [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: 01/10/2024] [Revised: 03/15/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
The rise of plastic production has triggered a surge in plastic waste, overwhelming marine ecosystems with microplastics. The effects of climate change, notably changing salinity, have shaped the dynamics of coastal lagoons. Thus, understanding the combined impact of these phenomena on marine organisms becomes increasingly crucial. To address these knowledge gaps, we investigated for the first time the interactive effects of environmental microplastics (EMPs) and increased salinity on the early development of Mytilus galloprovincialis larvae. Morphological assessments using the larval embryotoxicity test revealed larval anomalies and developmental arrests induced by EMPs and increased salinity. Transcriptomic analyses targeting 12 genes involved in oxidative stress, apoptosis, DNA repair, shell formation, and stress proteins were conducted on D-larvae uncovered the potential effects of EMPs on shell biomineralization, highlighting the role of Histidine Rich Glycoproteine (HRG) and tubulin as crucial adaptive mechanisms in Mytilus sp. in response to environmental shifts. Furthermore, we explored oxidative stress and neurotoxicity using biochemical assays. Our findings revealed a potential interaction between EMPs and increased salinity, impacting multiple physiological processes in mussel larvae. Our data contribute to understanding the cumulative effects of emerging anthropogenic pollutants and environmental stressors, emphasizing the need for a holistic approach to assessing their impact on marine ecosystems.
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Affiliation(s)
- Khouloud Boukadida
- Laboratory of Agrobiodiversity and Ecotoxicology, ISA, Chott-Mariem, 4042 Sousse, Tunisia; Higher Institute of Biotechnology, University of Monastir, Tunisia
| | - Rania Mlouka
- Laboratory of Agrobiodiversity and Ecotoxicology, ISA, Chott-Mariem, 4042 Sousse, Tunisia; Higher Institute of Biotechnology, University of Monastir, Tunisia
| | - Mohamed Rida Abelouah
- Laboratory of Agrobiodiversity and Ecotoxicology, ISA, Chott-Mariem, 4042 Sousse, Tunisia; Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Souha Chelly
- Laboratory of Agrobiodiversity and Ecotoxicology, ISA, Chott-Mariem, 4042 Sousse, Tunisia
| | - Ilef Romdhani
- Laboratory of Agrobiodiversity and Ecotoxicology, ISA, Chott-Mariem, 4042 Sousse, Tunisia
| | - Gea Oliveri Conti
- Marine Immunobiology Laboratory, Department of Earth and Marine Sciences (DiSTeM), University of Palermo, Viale delleScienze, Ed. 16, 90128 Palermo, Italy
| | - Margherita Ferrante
- Marine Immunobiology Laboratory, Department of Earth and Marine Sciences (DiSTeM), University of Palermo, Viale delleScienze, Ed. 16, 90128 Palermo, Italy
| | - Matteo Cammarata
- Environmental and Food Hygiene Laboratory (LIAA), Department of Medical, Surgical Sciences and Advanced Technologies "G. F. Ingrassia", Catania University, ViaSanta Sofia 87, 95123 Catania, Italy
| | - Maria Giovanna Parisi
- Environmental and Food Hygiene Laboratory (LIAA), Department of Medical, Surgical Sciences and Advanced Technologies "G. F. Ingrassia", Catania University, ViaSanta Sofia 87, 95123 Catania, Italy
| | - Aicha AitAlla
- Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Mohamed Banni
- Laboratory of Agrobiodiversity and Ecotoxicology, ISA, Chott-Mariem, 4042 Sousse, Tunisia; Higher Institute of Biotechnology, University of Monastir, Tunisia.
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Lourenço R, Cesar R, Koifman G, Teixeira M, Santos D, Polivanov H, Alexandre K, Carneiro M, da Silva LID, Pereira MMSC, Castilhos Z. Land disposal of dredged sediments from an urbanized tropical lagoon: toxicity to soil fauna. ECOTOXICOLOGY (LONDON, ENGLAND) 2024:10.1007/s10646-024-02757-9. [PMID: 38733499 DOI: 10.1007/s10646-024-02757-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/30/2024] [Indexed: 05/13/2024]
Abstract
Urban tropical lagoons are commonly impacted by silting, domestic sewage and industrial wastes and the dredging of their sediments is often required to minimize environmental impacts. However, the ecological implications of land disposal of dredged sediments are still poorly investigated in the tropics. Aiming to contribute to filling this gap, an ecotoxicological evaluation was conducted with dredged sediments from Tijuca Lagoon (Rio de Janeiro, Brazil) using different lines of evidence, including soil and sediment characterization, metal determination, and acute and avoidance bioassays with Eisenia andrei. Two different dredged sediment samples, a sandy sediment and another muddy one, were obtained in two distinct and spatially representative sectors of the Tijuca Lagoon. The sediments were mixed with an artificial soil, Ferralsol and Spodosol to obtain doses between 0 (pure soil) and 12%. The sediment dose that caused mortality (LC50) or avoidance responses (EC50) to 50% of the organisms was estimated through PriProbit analysis. Metal concentrations and toxicity levels were higher in the muddy sediment (artificial soil LC50 = 3.84%; Ferralsol LC50 = 4.58%; Spodosol LC50 = 2.85%) compared to the sandy one (artificial soil LC50 = 10.94%; Ferralsol LC50 = 14.36%; Spodosol LC50 = 10.38%), since fine grains tend to adsorb more organic matter and contaminants. Mortality and avoidance responses were the highest in Spodosol due to its extremely sandy texture (98% of sand). Metal concentrations in surviving earthworms were generally low, except sodium whose bioaccumulation was high. Finally, the toxicity is probably linked to marine salts, and the earthworms seem to accumulate water in excess to maintain osmotic equilibrium, increasing their biomass.
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Affiliation(s)
- Rodrigo Lourenço
- Department of Geography, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Ricardo Cesar
- Department of Geography, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil.
- Department of Geology, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil.
| | - Gustavo Koifman
- Department of Geography, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil
- Department of Geochemistry, Fluminense Federal University, UFF, Outeiro São João Baptista, s/n. Centro, Niterói, RJ, Brazil
| | - Matheus Teixeira
- Department of Geography, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil
- Department of Geochemistry, Fluminense Federal University, UFF, Outeiro São João Baptista, s/n. Centro, Niterói, RJ, Brazil
| | - Domynique Santos
- Department of Geography, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Helena Polivanov
- Department of Geology, CCMN-Geosciences Institute, Federal University of Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 274 - Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Katia Alexandre
- Centre for Mineral Technology, CETEM/MCTI, Av. Pedro Calmon, 900. Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Manuel Carneiro
- Centre for Mineral Technology, CETEM/MCTI, Av. Pedro Calmon, 900. Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Lilian Irene Dias da Silva
- Centre for Mineral Technology, CETEM/MCTI, Av. Pedro Calmon, 900. Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | | | - Zuleica Castilhos
- Centre for Mineral Technology, CETEM/MCTI, Av. Pedro Calmon, 900. Cidade Universitária, Rio de Janeiro, RJ, Brazil
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10
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de Castro DG, Lemes da Silva AL, das Neves Lopes M, Freire AS, Leite NK. Effect of urbanization and water quality on microplastic distribution in Conceição Lagoon watershed, Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:28870-28889. [PMID: 38564130 DOI: 10.1007/s11356-024-33029-y] [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: 08/21/2023] [Accepted: 03/17/2024] [Indexed: 04/04/2024]
Abstract
Urbanization in watersheds leads to the introduction of sources of microplastics and other pollutants in water bodies. However, the effect of urbanization on microplastic pollution and the relationship between microplastics and water quality are not well understood. We assessed the distribution of microplastics in tributaries urbanized, non-urbanized and in the receiving lagoon body of Conceição Lagoon watershed. The results show that urbanization significantly affects water quality but does not differentiate tributaries in terms of microplastic concentrations. Microplastic concentrations were lower in the receiving lagoon body compared with the tributaries, highlighting their importance in microplastic pollution in the studied lagoon. Microplastic concentration was correlated with low N:P ratios in the lagoon and associated with high levels of total phosphorus, which indicate the discharge of effluents. The correlations between microplastic concentration, water temperature, and dissolved oxygen in the lagoon were based on the temporal variations of these variables. Precipitation and wind velocity had influence on microplastic distribution in the watershed. Our findings underscore the importance of evaluating water quality parameters and meteorological variables to comprehend the microplastic distribution at small watersheds.
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Affiliation(s)
- Daniela Grijó de Castro
- Department of Ecology and Zoology, Laboratory of Continental Water Ecology (LIMNOS), Federal University of Santa Catarina, Campus Universitário, S/N, Sala 210, Bloco B, Térreo - Córrego Grande, ZIP: 88.040-900, Florianópolis, SC, Brazil
| | - Aurea Luiza Lemes da Silva
- Department of Ecology and Zoology, Laboratory of Continental Water Ecology (LIMNOS), Federal University of Santa Catarina, Campus Universitário, S/N, Sala 210, Bloco B, Térreo - Córrego Grande, ZIP: 88.040-900, Florianópolis, SC, Brazil
| | - Michelle das Neves Lopes
- Department of Ecology and Zoology, Laboratory of Continental Water Ecology (LIMNOS), Federal University of Santa Catarina, Campus Universitário, S/N, Sala 203, Bloco B, Térreo - Córrego Grande, ZIP: 88.040-900, Florianópolis, SC, Brazil
| | - Andrea Santarosa Freire
- Department of Ecology and Zoology, Laboratory of Crustaceans and Plankton (LCP), Federal University of Santa Catarina, Campus Universitário, S/N, Sala 210, Bloco B, Térreo - Córrego Grande, ZIP: 88.040-900, Florianópolis, SC, Brazil
| | - Nei Kavaguichi Leite
- Department of Ecology and Zoology, Laboratory of Continental Water Ecology (LIMNOS), Federal University of Santa Catarina, Campus Universitário, S/N, Sala 210, Bloco B, Térreo - Córrego Grande, ZIP: 88.040-900, Florianópolis, SC, Brazil.
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11
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Forero-López AD, Toniolo MA, Colombo CV, Rimondino GN, Cuadrado D, Perillo GME, Malanca FE. Marine microdebris pollution in sediments from three environmental coastal areas in the southwestern Argentine Atlantic. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169677. [PMID: 38163594 DOI: 10.1016/j.scitotenv.2023.169677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/21/2023] [Accepted: 12/23/2023] [Indexed: 01/03/2024]
Abstract
Microplastics (MPs) and antifouling paint particles (APPs) are important components of marine microdebris (MDs), which constitute a potential environmental risk. This study analyzed baseline contamination levels of MDs and mesodebris (MesDs) in intertidal sediments at different depths, exploring the geomorphological influence in three Argentine coastal environments: Bahía Blanca Estuary (BBE), Los Pocitos (LP) and Puerto Madryn (PM). The MDs and MesDs samples were characterized by μ-FTIR, SEM/EDX and XRD. The abundance of MPs and APPs in sediments, range between 19.78 and 1087.19 and between 0 and 172.93 items/kg d.w., respectively. Despite variations in population and industrial developments in these areas, MPs abundance shows no significant differences in low and high intertidal zones. However, mean MPs concentrations were higher in the surface layer (0-5 cm) compared to the deeper sediments (5-10 cm), indicating recent MPs deposition. Chemical characterization evidenced the presence of cellulose (CE) and denser polymers as acrylonitrile butadiene styrene (ABS) and polyacrylics (PAN), APPs, metallic and black MDs. Surface degradation and heavy metals (Zn, Cr, and Ba) were also detected in APPs and other MDs, either as additives or adhered to their surfaces. Changes in crystallinity were also observed on the MesDs due to weathering. The calculated polymer hazard index (PHI) and the presence of hazardous polymers such as ABS and PAN indicated an increased risk of MPs pollution on the BBE and PM coasts. The pollution load index (PLI) values (from 4.63 to 5.34) suggested unpolluted to moderately polluted levels. These findings offer insights into potential risks associated with MDs in Argentine intertidal sediments, underscoring the critical need to comprehend the geomorphology and the influence of coastal dynamics. This is crucial for effectively addressing challenges linked to MDs pollution guiding the development of robust management and mitigation strategies.
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Affiliation(s)
- A D Forero-López
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, Bahía Blanca B8000FWB, Buenos Aires, Argentina.
| | - M A Toniolo
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, Bahía Blanca B8000FWB, Buenos Aires, Argentina
| | - C V Colombo
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, Bahía Blanca B8000FWB, Buenos Aires, Argentina; Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas. Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - G N Rimondino
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas. Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - D Cuadrado
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, Bahía Blanca B8000FWB, Buenos Aires, Argentina
| | - G M E Perillo
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, Bahía Blanca B8000FWB, Buenos Aires, Argentina
| | - F E Malanca
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas. Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
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12
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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.
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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.
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13
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Rozman U, Blažič A, Kalčíková G. Phytoremediation: A promising approach to remove microplastics from the aquatic environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122690. [PMID: 37797928 DOI: 10.1016/j.envpol.2023.122690] [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: 07/27/2023] [Revised: 10/02/2023] [Accepted: 10/02/2023] [Indexed: 10/07/2023]
Abstract
Due to the increasing amount of microplastics (MPs) in the environment, various technologies for their removal have been investigated. One of the possible technologies are phytoremediation methods, but insufficient understanding of the interactions between MPs and aquatic macrophytes limits their further development. In this context, the aim of this study was to investigate the interactions between polyethylene MPs and the floating aquatic macrophyte Lemna minor in terms of the extent and time frame of MPs adhesion to the plant biomass, the stability of the interactions under water movement and understanding the nature of the adsorption process through the adsorption isotherm models. The results showed that the maximum number of adhered MPs was reached after 24 h. With increased amount of plant biomass the number of adhered MPs increased as well. Slow movement of water had no statistically significant effect on the adhesion of MPs. Among several adsorption models, the Freundlich adsorption isotherm model was the best fit to the experimental data, which assumes weak binding of MPs to plant biomass. Finally, 79% of MPs was removed during 15 cycles of phytoremediation (i.e., the biomass was removed and replaced with new biomass 15 times) and it was calculated that 53 cycles would be needed to remove all MPs from the water phase under test conditions.
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Affiliation(s)
- Ula Rozman
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, 113 Večna pot, SI-1000 Ljubljana, Slovenia
| | - Anej Blažič
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, 113 Večna pot, SI-1000 Ljubljana, Slovenia
| | - Gabriela Kalčíková
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, 113 Večna pot, SI-1000 Ljubljana, Slovenia.
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14
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Abdel Ghani SA, Shobier AH, El-Sayed AAM, Shreadah MA, Shabaka S. Quantifying microplastics pollution in the Red Sea and Gulfs of Suez and Aqaba: Insights from chemical analysis and pollution load assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:166031. [PMID: 37541508 DOI: 10.1016/j.scitotenv.2023.166031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/06/2023]
Abstract
Microplastics (MPs) constitute the majority of marine plastic litter. The pollution caused by MPs has been categorized as a gradual and persistent crisis, but little is known about its extent along the shores of the Red Sea, particularly on the Egyptian side. The Red Sea is a rapidly developing region and home to critical ecosystems with high levels of endemism. This study represents the first comprehensive survey investigating the extent of MP pollution along the Egyptian shores of the Red Sea, including the Gulf of Suez and Aqaba. Mean concentrations ranged from 23.3 ± 15.28 to 930.0 ± 181.9 MPs/kg DW. Out of 17 beaches surveyed, 12 had mean concentrations of <200 items/kg, indicating a low occurrence of MPs compared to the shores of the Mediterranean Coast of Egypt. The pollution load index varied from low to medium levels in most locations. Ras Mohamed, a marine protected area, showed high vulnerability to MP pollution. All the investigated particles were fragments of secondary MPs. The sources of pollution mainly come from maritime activities, including cargo shipping and intense recreational activities. Fourier Transform Infrared Spectroscopy identified four plastic polymers, with polyethylene and polypropylene being the most common. The surface morphology of plastic particles was examined using scanning electron microscopy combined with energy-dispersive X-ray spectroscopy. All the particles exhibited signs of degradation, which could generate countless plastic pieces with possible deleterious impacts. This work has highlighted the importance of conducting region-specific assessments of mismanaged plastic waste, focusing on the role of tourism and recreational navigation as contributors to plastic litter, to estimate plastic waste inputs into the waters of the Red Sea Coast of Egypt. Efforts are needed to develop strategic plans to reduce the disposal of plastic waste in the region.
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Affiliation(s)
| | - Aida H Shobier
- National Institute of Oceanography and Fisheries, Niof, Egypt
| | | | - M A Shreadah
- National Institute of Oceanography and Fisheries, Niof, Egypt
| | - Soha Shabaka
- National Institute of Oceanography and Fisheries, Niof, Egypt.
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15
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Ayala F, Rangel-Vega A, Quinde E, Reyes E, Zeta-Flores M, Tume-Ruiz J, De-la-Torre GE. Bibliometric review on microplastic contamination in the Pacific Alliance countries. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1369. [PMID: 37880459 DOI: 10.1007/s10661-023-11990-4] [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: 02/15/2023] [Accepted: 10/12/2023] [Indexed: 10/27/2023]
Abstract
Microplastics, capable of absorbing persistent organic compounds, heavy metals, and emerging pollutants, are of global concern due to their potential to alter the behavior and metabolism of biota. In Latin America, the Pacific Alliance, comprising Mexico, Colombia, Peru, and Chile, stands out for its biological wealth and productive ecosystems, which account for 37% of the region's gross domestic product. The leaders of these countries expressed their concern about microplastic pollution and pledged to take joint action. We conducted an analysis of the scientific production of these countries and the collaborations of their researchers, focused on the period 2015-2023, using Scopus and SCImago. We observed that marine-coastal/wetland ecosystems are the most studied, with a focus on fish, and that Mexico leads in publications, followed by Colombia, Peru, and Chile. In addition, we note the absence of an inter-institutional group dedicated to microplastics research in these countries. We recommend promoting collaboration between academic institutions specialized in microplastic research and government agencies dedicated to the promotion of science and technology in the countries belonging to the Pacific Alliance.
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Affiliation(s)
- Félix Ayala
- Centro para la Sostenibilidad Ambiental, Universidad Peruana Cayetano Heredia, Lima, Peru.
| | - Antia Rangel-Vega
- Facultad de Ingeniería Pesquera, Universidad Nacional de Piura, Piura, Peru
| | - Edgardo Quinde
- Facultad de Ingeniería Pesquera, Universidad Nacional de Piura, Piura, Peru
| | - Eddy Reyes
- Facultad de Ingeniería Pesquera, Universidad Nacional de Piura, Piura, Peru
| | - Martín Zeta-Flores
- Facultad de Ingeniería de Minas, Universidad Nacional de Piura, Piura, Peru
| | - Juan Tume-Ruiz
- Facultad de Ingeniería Pesquera, Universidad Nacional de Piura, Piura, Peru
| | - Gabriel Enrique De-la-Torre
- Grupo de Investigación de Biodiversidad, Medio Ambiente y Sociedad, Universidad San Ignacio de Loyola, Lima, Peru
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16
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Pellegrini C, Saliu F, Bosman A, Sammartino I, Raguso C, Mercorella A, Galvez DS, Petrizzo A, Madricardo F, Lasagni M, Clemenza M, Trincardi F, Rovere M. Hotspots of microplastic accumulation at the land-sea transition and their spatial heterogeneity: The Po River prodelta (Adriatic Sea). THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 895:164908. [PMID: 37385497 DOI: 10.1016/j.scitotenv.2023.164908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/07/2023] [Accepted: 06/13/2023] [Indexed: 07/01/2023]
Abstract
Deltas are the locus of river-borne sediment accumulation, however, their role in sequestering plastic pollutants is still overlooked. By combining geomorphological, sedimentological, and geochemical analyses, which include time-lapse multibeam bathymetry, sediment provenance, and μFT-IR analyses, we investigate the fate of plastic particles after a river flood event providing an unprecedented documentation of the spatial distribution of sediment as well as of microplastics (MPs), including particles fibers, and phthalates (PAEs) abundances in the subaqueous delta. Overall sediments are characterized by an average of 139.7 ± 80 MPs/kg d.w., but display spatial heterogeneity of sediment and MPs accumulation: MPs are absent within the active sandy delta lobe, reflecting dilution by clastic sediment (ca. 1.3 Mm3) and sediment bypass. The highest MP concentration (625 MPs/kg d.w.) occurs in the distal reaches of the active lobe where flow energy dissipates. In addition to MPs, cellulosic fibers are relevant (of up to 3800 fibers/kg d.w.) in all the analyzed sediment samples, and dominate (94 %) with respect to synthetic polymers. Statistically significant differences in the relative concentration of fiber fragments ≤0.5 mm in size were highlighted between the active delta lobe and the migrating bedforms in the prodelta. Fibers were found to slightly follow a power law size distribution coherent with a one-dimensional fragmentation model and thus indicating the absence of a size dependent selection mechanism during burial. Multivariate statistical analysis suggests traveling distance and bottom-transport regime as the most relevant factors controlling particle distribution. Our findings suggest that subaqueous prodelta should be considered hot spots for the accumulation of MPs and associated pollutants, albeit the strong lateral heterogeneity in their abundances reflects changes in the relative influence of fluvial and marine processes.
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Affiliation(s)
- C Pellegrini
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy.
| | - F Saliu
- Earth and Environmental Science Department, University of Milano Bicocca, Milano, Italy
| | - A Bosman
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Geologia Ambientale e Geoingegneria (IGAG), Italy
| | - I Sammartino
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy
| | - C Raguso
- Earth and Environmental Science Department, University of Milano Bicocca, Milano, Italy
| | - A Mercorella
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy
| | - D S Galvez
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy
| | - A Petrizzo
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy
| | - F Madricardo
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy
| | - M Lasagni
- Earth and Environmental Science Department, University of Milano Bicocca, Milano, Italy
| | - M Clemenza
- INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy
| | - F Trincardi
- Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Scienze del Sistema Terra e Tecnologie per l'Ambiente (DSSTTA), Rome, Italy
| | - M Rovere
- Consiglio Nazionale delle Ricerche (CNR), Istituto di Scienze Marine (ISMAR-CNR), Italy
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17
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Gan M, Zhang Y, Shi P, Cui L, Sun H. Microplastic pollution in typical seasonal rivers in northern China: temporal variation and risk assessment. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:1479-1490. [PMID: 37581367 DOI: 10.1039/d3em00281k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Rivers are important channels for the transport of microplastics (MPs) from land to sea. In this work, the temporal variation and risk assessment of MP pollution in the surface water of the Wei River, a typical seasonal river in northern China, were quantified. The number abundance of MPs in the dry season was significantly higher than that in the wet season (p < 0.05). Fiber was the most abundant type of MP in both dry and wet seasons. Infrared spectrometer and Raman spectroscopy identification showed that polypropylene (PP) and polyethylene (PE) were the major polymers found in both dry and wet seasons, and the mixture of different MP polymers was more diverse in the dry season. The risk assessment showed that the average pollution load index (PLI) and risk quotient (RQ) were 2.10 and 1.19 in the dry season, which significantly decreased to 1.25 and 0.74, respectively, in the wet season (p < 0.05). In total, the results from this study highlight the characteristics of seasonal rivers that influence the temporal distribution and risk assessment of microplastics, providing scientific reference for policymakers and river managers to effectively deal with MP pollution.
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Affiliation(s)
- Mufan Gan
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China.
| | - Yan Zhang
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China.
| | - Peng Shi
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
| | - Lingzhou Cui
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
| | - Haotian Sun
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China.
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Garcés-Ordóñez O, Castillo-Olaya V, Espinosa-Díaz LF, Canals M. Seasonal variation in plastic litter pollution in mangroves from two remote tropical estuaries of the Colombian Pacific. MARINE POLLUTION BULLETIN 2023; 193:115210. [PMID: 37385182 DOI: 10.1016/j.marpolbul.2023.115210] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/16/2023] [Accepted: 06/20/2023] [Indexed: 07/01/2023]
Abstract
Mangroves in estuaries are highly vulnerable to the impacts of plastic litter pollution, because their location at river mouths and the high capacity of mangrove trees to trap plastic items. Here, we present new results on the abundance and characteristics of plastic litter during high and low rainfall seasons in mangrove waters and sediments of the Saija and Timbiqui River estuaries in the Colombian Pacific. In both estuaries, microplastics were the most common size (50-100 %), followed by mesoplastics (13-42 %) and macroplastics (0-8 %). Total abundances of plastic litter were higher during the high rainfall season (0.17-0.53 items/m-3 in surface waters and 764-832 items/m-2 in sediments), with a moderately positive relationship between plastic abundances recorded in both environmental matrices. The most common microplastics were foams and fragments. Continuous research and monitoring are required for a better understanding and management of these ecosystems and their threats.
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Affiliation(s)
- Ostin Garcés-Ordóñez
- Programa Calidad Ambiental Marina, Instituto de Investigaciones Marinas y Costeras José Benito Vives de Andréis - INVEMAR, calle 25 # 2-55 Rodadero, Santa Marta, Colombia; GRC Geociències Marines, Departament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain; Red de Vigilancia para la Conservación y Protección de las aguas marinas y costeras de Colombia-REDCAM, Santa Marta, Colombia.
| | - Victoria Castillo-Olaya
- Programa Calidad Ambiental Marina, Instituto de Investigaciones Marinas y Costeras José Benito Vives de Andréis - INVEMAR, calle 25 # 2-55 Rodadero, Santa Marta, Colombia
| | - Luisa F Espinosa-Díaz
- Programa Calidad Ambiental Marina, Instituto de Investigaciones Marinas y Costeras José Benito Vives de Andréis - INVEMAR, calle 25 # 2-55 Rodadero, Santa Marta, Colombia; Red de Vigilancia para la Conservación y Protección de las aguas marinas y costeras de Colombia-REDCAM, Santa Marta, Colombia
| | - Miquel Canals
- GRC Geociències Marines, Departament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain
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Gu YG, Wang YS, Jordan RW, Su H, Jiang SJ. Probabilistic ecotoxicological risk assessment of heavy metal and rare earth element mixtures in aquatic biota using the DGT technique in coastal sediments. CHEMOSPHERE 2023; 329:138592. [PMID: 37023907 DOI: 10.1016/j.chemosphere.2023.138592] [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: 02/14/2023] [Revised: 03/31/2023] [Accepted: 04/01/2023] [Indexed: 05/03/2023]
Abstract
Heavy metals (HMs) are routine contaminants due to their extensive use worldwide. Rare earth elements (REEs) are emerging contaminants because of their global exploitation for use in the high-tech sector. Diffusive gradients in thin films (DGT) are an effective method for measuring the bioavailable component of pollutants. This study represents the first assessment of the mixture toxicity of HMs and REEs in aquatic biota using the DGT technique in sediments. Xincun Lagoon was chosen as the case study site because it has been contaminated by pollutants. Nonmetric multidimensional scaling (NMS) analysis reveals that a wide variety of pollutants (Cd, Pb, Ni, Cu, InHg, Co, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Yb) are primarily impacted by sediment characteristics. Appraisal of single HM-REE toxicity reveals that the risk quotient (RQ) values for Y, Yb and Ce notably exceeded 1, demonstrating that the adverse effects of these single HMs and REEs should not be ignored. The combined toxicity of HM-REE mixtures in terms of probabilistic ecological risk assessment shows that the Xincun surface sediments had a medium probability (31.29%) of toxic effects on aquatic biota.
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Affiliation(s)
- Yang-Guang Gu
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China; Faculty of Science, Yamagata University, Yamagata, 990-8560, Japan; Sanya Tropical Fisheries Research Institute, Sanya, 572025, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China; Key Laboratory of Fishery Ecology and Environment, Guangdong Province, Guangzhou, 510300, China; Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou, 510300, China.
| | - Ya-Su Wang
- College of Oceanography, Hohai University, Nanjing, 245700, China
| | - Richard W Jordan
- Faculty of Science, Yamagata University, Yamagata, 990-8560, Japan
| | - Hong Su
- College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Shi-Jun Jiang
- College of Oceanography, Hohai University, Nanjing, 245700, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China
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Das BC, Ramanan P A, Gorakh SS, Pillai D, Vattiringal Jayadradhan RK. Sub-chronic exposure of Oreochromis niloticus to environmentally relevant concentrations of smaller microplastics: Accumulation and toxico-physiological responses. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131916. [PMID: 37402322 DOI: 10.1016/j.jhazmat.2023.131916] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/09/2023] [Accepted: 06/21/2023] [Indexed: 07/06/2023]
Abstract
This study assesses the accumulation and toxic effects of environmentally relevant concentrations (0.01, 0.1 and 1 mg/L) of polystyrene MPs (1 µm) in Oreochromis niloticus (Nile tilapia) for 14 days. The results showed that 1 µm PS-MPs accumulated in the intestine, gills, liver, spleen, muscle, gonad and brain. RBC, Hb and HCT showed a significant decline, while WBC and PLT showed a significant increase after the exposure. Glucose, total protein, A/G ratio, SGOT, SGPT and ALP showed significant increments in 0.1 and 1 mg/L of PS-MPs treated groups. The increase in cortisol level and upregulation of HSP70 gene expression in response to MPs exposure indicate MPs-mediated stress in tilapia. MPs-induced oxidative stress is evident from reduced SOD activity, increased MDA levels and upregulated P53 gene expression. The immune response was enhanced by inducing respiratory burst activity, MPO activity and serum TNF-α and IgM levels. MPs exposure also led to down-regulation of CYP1A gene and decreased AChE activity, GNRH and vitellogenin levels, indicating the toxicity of MPs on the cellular detoxification mechanism, nervous and reproductive systems. The present study highlights the tissue accumulation of PS-MP and its effects on hematological, biochemical, immunological and physiological responses in tilapia with low environmentally relevant concentrations.
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Affiliation(s)
- Bini C Das
- Department of Aquatic Animal Health Management, Kerala University of Fisheries and Ocean Studies, Kochi, Kerala, India
| | - Aparna Ramanan P
- Department of Aquatic Animal Health Management, Kerala University of Fisheries and Ocean Studies, Kochi, Kerala, India
| | - Satkar Sagar Gorakh
- Department of Aquatic Animal Health Management, Kerala University of Fisheries and Ocean Studies, Kochi, Kerala, India
| | - Devika Pillai
- Department of Aquatic Animal Health Management, Kerala University of Fisheries and Ocean Studies, Kochi, Kerala, India
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Areguamen OI, Calvin NN, Gimba CE, Okunola OJ, Elebo A. Seasonal assessment of the distribution, source apportionment, and risk of water-contaminated polycyclic aromatic hydrocarbons (PAHs). ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023:10.1007/s10653-023-01542-7. [PMID: 36976374 DOI: 10.1007/s10653-023-01542-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 03/12/2023] [Indexed: 06/18/2023]
Abstract
The research aims to evaluate the seasonal differences in the distribution, source, and risks of water-contaminated PAHs. The PAHs were extracted by the liquid-liquid method and analyzed with GC-MS, and a total of eight PAHs were detected. There was a percentage increase in the average concentration of the PAHs from the wet to the dry season in the range of 20 (Anthracene)-350 (Pyrene)%. Total PAHs (∑PAHs) range from 0.31 to 1.23 mg/l in the wet period and from 0.42 to 1.96 mg/l in the dry period. The distribution of the average PAHs in mg/l showed that Fluoranthene ≤ Pyrene < Acenaphthene < Fluorene < Phenanthrene < Acenaphthylene < Anthracene < Naphthalene in wet period and while Fluoranthene < Acenaphthene < Pyrene < Fluorene < Phenanthrene < Acenaphthylene < Anthracene < Naphthalene in the dry period. The children were exposed to non-carcinogenic risk through non-dietary ingestion due to the accumulative effect (HI) of the PAHs in the dry period. Furthermore, the naphthalene was responsible for ecological and carcinogenic risk in the wet period, while the fluorene, phenanthrene, and anthracene were responsible for ecological and carcinogenic risk in the dry period. However, while adults and children are both susceptible to carcinogenic risk through the oral channel during the dry period, only children are susceptible to non-carcinogenic risk through this pathway. The multivariate statistical analysis revealed the influence of physicochemical parameters on the detected PAHs and also showed the PAHs' sources to be mainly combustion, pyrolysis, and vehicular emission.
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Affiliation(s)
| | | | | | | | - Abuchi Elebo
- Chemistry Department, Ahmadu Bello University, Zaria, Kaduna, Nigeria
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Ma XY, Kang X, Su CX, Chen YQ, Sun HM. Effects of water chemistry on microfabric and micromechanical properties evolution of coastal sediment: A centrifugal model study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 866:161343. [PMID: 36596424 DOI: 10.1016/j.scitotenv.2022.161343] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/22/2022] [Accepted: 12/29/2022] [Indexed: 06/17/2023]
Abstract
Water chemistry alteration induced strength weakening of natural sediment, which leads to the differential settlement of infrastructures in coastal areas, has caused numerous disasters and engineering failures. To thoroughly understand the underlying mechanisms of how water chemistry influences the microfabric and mechanical properties evolution of coastal sediments, herein, the authors adopted centrifuge test, X-ray diffraction (XRD), and atomic force microscope (AFM) to quantitatively study the structure anisotropy index (i.e., orientation index (OI)), micromorphological property (i.e., root mean square height (Sq)), and micromechanics (i.e., microscale apparent modulus) of clay sediments in different water chemistry conditions and gravity gradients. The results show that the change rule of OI is: OIsaline > OIalkaline > OIwater > OIacid, along the vertical sedimentary depth. Randomly distributed clay flocs and loose flocculated soil skeleton (mainly consisted by edge-to-face (EF) and edge-to-edge (EE) contact of the kaolinite platelets) are associated with the acidic water chemical conditions. The action of supergravity and face-to-face (FF) repulsive contact mode lead to high degree of anisotropy of kaolinite sediments in alkaline environment. Clay platelets are compacted closely under the synergetic effect of centrifugal pressure and prevailing van der Waals attraction (reduction of electric double layer repulsion) in saline environment. The change of 1/Sq is highly consistent with the change of OI at different depths in different water chemical environments. Along the sedimentary depth (i.e., transition from the normal gravity (1 g) to supergravity (8000 g)), the microscale apparent modulus of kaolinite sediment was found to be the highest in alkaline environment. As the water chemistry changes from alkaline to acidic, however, the microscale apparent modulus of kaolinite aggregate decreased, and it showed the smallest in the saline environment.
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Affiliation(s)
- Xiong-Ying Ma
- Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China; National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha 410082, China; College of Civil Engineering, Hunan University, Changsha 410082, China
| | - Xin Kang
- Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China; National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha 410082, China; College of Civil Engineering, Hunan University, Changsha 410082, China.
| | - Chen-Xi Su
- Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China; National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha 410082, China; College of Civil Engineering, Hunan University, Changsha 410082, China
| | - Yong-Qing Chen
- Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China; National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha 410082, China; College of Civil Engineering, Hunan University, Changsha 410082, China
| | - He-Mei Sun
- Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China; National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha 410082, China; College of Civil Engineering, Hunan University, Changsha 410082, China
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