Speciation and distribution of mercury in soils around gold mines located upstream of Miyun Reservoir, Beijing, China

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	Speciation and distribution of mercury in soils around gold mines located upstream of Miyun Reservoir, Beijing, China
	Baohu Zhu; Xiaomin Chen; Hongbing Ji; Wen Yang; Huaijian Ding
刊名	Journal of Geochemical Exploration
	2016
卷号	163 期号:1 页码:1-9
英文摘要	Long-termmining and smelting activities have contaminated gold mine soils and sediments close to Miyun Reservoir. Several studies have reported concentrations of mercury (Hg) in the Miyun Reservoir area, but this paper presents the first comprehensive study of the distribution and speciation of Hg in this area. The gold mines upstream of the Miyun Reservoir were selected for study. Our results indicate that the total Hg contents in soils (average of 9.57 mg.kg(-1)) were higher in the study area than background values for Beijing surface soils. Samples suggest that Hg distributed as from a point source around the tailings, suggesting that tailings are the major sink for anthropogenic Hg in the study area. Total Hg had a negative correlation with cation exchange capacity, while pH and total organic carbon showed little correlation with total Hg. Hg in soils existed mainly in residual form, with bioavailable Hg accounting for only 0.30% of total Hg. High pH conditions were conductive to the formation of Fe-Mn oxide-bound Hg in mine soils. The Muller geoaccumulation index used to assess pollution indicates that Hg had very serious pollution levels within the study area, requiring urgent management to prevent residual Hg becoming exchangeable through humic acid conversion and entering the watershed.
学科主题	环境地球化学
语种	英语
公开日期	2017-05-25
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6146]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Baohu Zhu,Xiaomin Chen,Hongbing Ji,et al. Speciation and distribution of mercury in soils around gold mines located upstream of Miyun Reservoir, Beijing, China[J]. Journal of Geochemical Exploration,2016,163(1):1-9.
APA	Baohu Zhu,Xiaomin Chen,Hongbing Ji,Wen Yang,&Huaijian Ding.(2016).Speciation and distribution of mercury in soils around gold mines located upstream of Miyun Reservoir, Beijing, China.Journal of Geochemical Exploration,163(1),1-9.
MLA	Baohu Zhu,et al."Speciation and distribution of mercury in soils around gold mines located upstream of Miyun Reservoir, Beijing, China".Journal of Geochemical Exploration 163.1(2016):1-9.