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Effects of environmental governance in mining areas: The trend of arsenic concentration in the environmental media of a typical mining area in 25 years
Zhao, Chen; Yang, Jun; Zheng, Yuanming; Yang, Junxing; Guo, Guanghui; Wang, Jingyun; Chen, Tongbin
2019-11-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume235Pages:849-857
AbstractChina has considered different environmental management measures (EMMs) in mining areas. However, their effects remain unclarified. In this study, the achievements and limitations of different EMMs of a typical mining area-Huangchang realgar mine-located in Hunan province were explored. The variations in the arsenic concentrations in the soil, agricultural products, drinking water, and atmosphere in 25 years of EMM implementation were investigated. Source control measures, such as ceasing mining and smelting activities, disposal of waste residues, and purifying wastewater, significantly reduced the arsenic concentrations in the atmosphere and surface water by more than 99%-from 68 mu g m(-3) and 0.42 mg L-1 to 3.63 ng m(-3) and 4.31 mu g L-1, respectively. The arsenic concentrations in agricultural products decreased by more than 78.8%-from 1.32 mg kg(-1) in wheat to 0.28 mg kg(-1) in vegetable and 0.13 mg kg(-1) in maize-after the planting structure adjustment (PSA). However, the chronic daily intake of arsenic via product ingestion was 1.5 times higher than the benchmark dose lower confidence limit. Natural attenuation measures exerted limited effects on soil remediation; the arsenic concentration in the soil decreased insignificantly from 291.9 mg kg(-1) to 213.3 mg kg(-1). With the current attenuation rate, decreasing the soil arsenic concentration to under 30 mg kg(-1) would require 47,900 years. The exceeding contaminant concentration in the resuspended dust, surface runoff, and agricultural products from the contaminated soil must be considered. China's EMMs in mining areas have achieved significant results, but the contaminated soil requires more attention and the PSA should accommodate the dietary habits and economic limits. (C) 2019 Published by Elsevier Ltd.
Department土壤环境科学与技术实验室
KeywordArsenic mining area Environmental management measures Effectiveness assessment Contaminated environmental media Contaminant concentration change
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43294
Collection土壤环境科学实验室
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, 11A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Chen,Yang, Jun,Zheng, Yuanming,et al. Effects of environmental governance in mining areas: The trend of arsenic concentration in the environmental media of a typical mining area in 25 years[J]. CHEMOSPHERE,2019,235:849-857.
APA Zhao, Chen.,Yang, Jun.,Zheng, Yuanming.,Yang, Junxing.,Guo, Guanghui.,...&Chen, Tongbin.(2019).Effects of environmental governance in mining areas: The trend of arsenic concentration in the environmental media of a typical mining area in 25 years.CHEMOSPHERE,235,849-857.
MLA Zhao, Chen,et al."Effects of environmental governance in mining areas: The trend of arsenic concentration in the environmental media of a typical mining area in 25 years".CHEMOSPHERE 235(2019):849-857.
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