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Ding Y, Xi L, Wu Y, Chen Y, Guo X, Shi H, Cai S. Spatial Differentiation Characteristics and Evaluation of Cu and Cd in Paddy Soil around a Copper Smelter. TOXICS 2023; 11:647. [PMID: 37624153 PMCID: PMC10457998 DOI: 10.3390/toxics11080647] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/21/2023] [Accepted: 07/22/2023] [Indexed: 08/26/2023]
Abstract
To accurately evaluate the distribution and bioavailability of potentially toxic elements (PTEs) such as Cu and Cd in farmlands near a copper smelter, we determined the total concentrations (Cu-T and Cd-T), various speciation concentrations of Cu and Cd and physicochemical properties of 18 paddy soil (or colloid) samples in Guixi town, Jiangxi province, China. The results showed that the concentrations of Cu-T and Cd-T in the soil around the smelter far exceeded the standard limits. Specifically, Cu ranged from 97.47 to 1294.63 mg·kg-1, with a coefficient of variation (CV) of 0.95; Cd ranged from 0.14 to 9.06 mg·kg-1, and the CV was 1.68. Furthermore, the pollution of PTEs continued to accumulate, posing a significant risk to the environment and human health. The findings from the analysis of soil and colloid indicated that the distribution characteristics of Cu and Cd speciations did not align with the total concentrations. The highest pollution points were found to be shifted to the residual fraction of Cu, organic fraction, and crystalline iron oxide fraction of Cd in soil. The dominant fraction of Cu in colloid was the amorphous iron oxide fraction, whereas Cd was the crystalline iron oxide fraction. The assessment of Cu and Cd migration (MR) revealed that Cd posed a greater ecological risk. Further examination of the properties of iron oxides in soil and colloid revealed that they played a crucial role in the migration and transformation of soil PTEs.
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Affiliation(s)
- Yuan Ding
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Li Xi
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Yujing Wu
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Yihong Chen
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Xiaoping Guo
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China
| | - Hong Shi
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- Jiangxi Key Laboratory of Agricultural Efficient Water-Saving and Non-Point Source Pollution Preventing, Jiangxi Central Station of Irrigation Experiment, Nanchang 330063, China
| | - Shuo Cai
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China; (L.X.); (Y.W.); (Y.C.); (X.G.); (S.C.)
- Jiangxi Key Laboratory of Agricultural Efficient Water-Saving and Non-Point Source Pollution Preventing, Jiangxi Central Station of Irrigation Experiment, Nanchang 330063, China
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Qin J, Jiang X, Yan Z, Zhao H, Zhao P, Yao Y, Chen X. Heavy metal content and microbial characteristics of soil plant system in Dabaoshan mining area, Guangdong Province. PLoS One 2023; 18:e0285425. [PMID: 37294818 PMCID: PMC10256142 DOI: 10.1371/journal.pone.0285425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 04/21/2023] [Indexed: 06/11/2023] Open
Abstract
The disordered mining of Dabaoshan lead-zinc mineral resources in Shaoguan has brought serious harm to the regional ecological environment. In order to investigate the heavy metal pollution status and microbial characteristics of soil plant system in mining area, The distribution of heavy metals in the soil, the activity of soil microorganisms and the accumulation characteristics of heavy metals in the dominant plant Miscanthus floridulus were studied. The results indicated that metal element contents of Miscanthus floridulus in sequence were: Zn>Pb>Cu> Cd. This study demonstrated that the elemental content of the Miscanthus floridulus plant showed Zn>Pb>Cu>Cd, with Zn being the most significantly correlated with soil elements, followed by Pb. Compared with the control group, the Miscanthus floridulus-soil system possessed obviously different soil microbial features: intensiver in microbial basal respiration strength, and higher microbial eco-physiological parameters Cmic/Corg and qCO2, but lower in soil microbial biomass. The results showed the soil enzymatic activities decreased significantly with increase of contamination of heavy metals, especially dehydrogenase and urease activities. With the increase of the content of heavy metals in the mining area soil, the intensity of soil biochemical action in the mining area (Q1, Q2) soil decreased significantly, and the biochemical action showed a significant negative correlation with the content of heavy metals in the soil. Compared with the non mining area (Q8) soil, the intensity of soil ammonification, nitrification, N fixation and cellulose decomposition decreased by 43.2%~71.1%, 70.1%~92.1%, 58.7%~87.8% and 55.3%~79.8% respectively. The decrease of soil microbial activity weakened the circulation rate and energy flow of C and N nutrients in the soil of the mining area.
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Affiliation(s)
- Jianqiao Qin
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, China
| | - Xueding Jiang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China
| | | | - Huarong Zhao
- School of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Peng Zhao
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment of the People’s Republic of China, Guangzhou, 510655, China
| | - Yibo Yao
- Guangdong Provincial Academy of Environmental Scienc, Guangzhou, 510045, China
| | - Xi Chen
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China
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An Overview of the Valorization of Aquatic Plants in Effluent Depuration through Phytoremediation Processes. Appl Microbiol 2022. [DOI: 10.3390/applmicrobiol2020023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Environmental biotechnologies are a popular choice for using efficient, low-cost, low-waste, and environmentally friendly methods to clean up and restore polluted sites. In these technologies, plants (terrestrial and aquatic) and their associated micro-organisms are used to eliminate pollutants that threaten the health of humans and animals. They have emerged as alternative methods to conventional techniques that have become increasingly aggressive to the environment. Currently, all actors of the environment, whether governors, industrialists, or citizen associations are more interested in the application and development of these technologies. The present overview provides available information about recent developments in phytoremediation processes using specifically aquatic plants. The main goal is to highlight the key role of this technology in combating the drastic organic and inorganic pollution that threatens our planet daily. Furthermore, this study presents the valorization of aquatic plant after phytoremediation process in energy. In particular, this article tries to identify gaps that are necessary to propose future developments and prospects that could guarantee sustainable development aspired by all generations.
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