A re-assessment of metal pollution in the Dexing mining area in Jiangxi province, China: current status, hydro-geochemical controls, and effectiveness of remediation practices

被引:0
作者
S. Xie
C. Yu
B. Peng
H. Xiao
W. Zhang
Z. Zhou
M. E. Åström
机构
[1] Hunan Normal University,Faculty of Resource and Environment Science
[2] East China University of Technology,School of Earth Sciences
[3] Linnaeus University,Department of Biology and Environmental Science
[4] East China University of Technology,Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution
[5] East China University of Technology,School of Water Resources and Environmental Engineering
来源
International Journal of Environmental Science and Technology | 2022年 / 19卷
关键词
Mining; Metal contamination; Metal speciation; Remediation; Lean river;
D O I
暂无
中图分类号
学科分类号
摘要
This study re-assess the environmental impacts of the Dexing copper mine (the largest open-pit copper mine in Asia) on the Lean river and its two tributaries (the Dawu river and Jishui river) in the Jiangxi province, China, with particular focus on metal pollution as well as the effectiveness and side-effects of remediation activities. Results show that the Dawu river and its mixing zone with the Lean river were still heavily influenced by acid mine drainage (AMD) and loaded with elevated levels of metals, in particular Mn, Ni, and Al whose concentrations were frequently above the health-based guideline values. Manganese and Ni in the AMD-impacted waters were predicted to occur as free ions or sulfate and carbonate complexes, and thus highly-toxic to living organisms. Although Al in the AMD-impacted waters was predicted to exist largely as colloidal hydroxides with low bioavailability, abundant formation of such nano-sized particles could impair the respiratory and circulatory systems of aquatic macro-invertebrates. The integration and comparison of the results from the current and previous studies show that the concentrations of several metals (Cu, Zn, and Cd) in the Dawu river decreased significantly after 2011–2012, during which several remediation practices were implemented (e.g., AMD neutralization, excavation of contaminated sediments in impounded rivers, and rehabilitation of mine tailings and open-pit slopes). This provides evidence that these remediation practices have effectively limited the dispersion of metals from the mining area. However, AMD neutralization greatly enhanced the release of sulfate, making the mining area an even more important sulfate source.
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页码:10707 / 10722
页数:15
相关论文
共 318 条
[61]  
Fytianos K(2011)Heavy metal contamination in sediments and floodplain topsoils of the Lean River catchment China Soil Sediment Contam 20 810-407
[62]  
Genchi G(2012)Evolution of the environmental Quality and the early warning model research on heavy metals in DeXing copper mine (in Chinese with English abstract) Miner Depos 31 495-28
[63]  
Carocci A(2004)Eco-environmental geochemistry of heavy metal pollution in Dexing mining area Chin J Geochem 23 349-1514
[64]  
Lauria G(2014)Retention and transport of arsenic, uranium and nickel in a black shale setting revealed by a long-term humidity cell test and sequential chemical extractions Chem Geol 363 134-84
[65]  
Sinicropi MS(2016)Exposure risk of rural residents to copper in the Le’an River Basin, Jiangxi Province, China Sci Total Environ 548–549 402-undefined
[66]  
Catalano A(2019)Geochemical controls on dispersion of U and Th in Quaternary deposits, stream water, and aquatic plants in an area with a granite pluton Sci Total Environ 663 16-undefined
[67]  
Gensemer RW(2012)SHRIMP U-Pb dating on hydrothermal zircons: evidence for an Early Cretaceous epithermal event in the Middle Jurassic Dexing porphyry copper deposit Southeast China Econ Geol 107 1507-undefined
[68]  
Playle RC(2018)Cadmium contamination in soils and crops in four mining areas, China J Geochem Explor 192 72-undefined
[69]  
Guo G(undefined)undefined undefined undefined undefined-undefined
[70]  
Yuan T(undefined)undefined undefined undefined undefined-undefined