Effects of environmental governance in mining areas: The trend of arsenic concentration in the environmental media of a typical mining area in 25 years

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 土壤环境科学实验室

	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
刊名	CHEMOSPHERE
	2019-11-01
卷号	235 页码:849-857
关键词	Arsenic mining area Environmental management measures Effectiveness assessment Contaminated environmental media Contaminant concentration change
ISSN号	0045-6535
英文摘要	China 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.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43294]
专题	生态环境研究中心_土壤环境科学实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, 11A Datun Rd, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
推荐引用方式 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.