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Sources and migration of heavy metals in a karst water system under the threats of an abandoned Pb-Zn mine, Southwest China

文献类型：期刊论文

作者Qin, Wenjing2,4; Han, Dongmei2,3,4; Song, Xianfang2,3,4; Liu, Shaohua1,5,6
刊名ENVIRONMENTAL POLLUTION
出版日期2021-05-15
卷号277页码:14
关键词Karst area Heavy metals Water quality Groundwater Surface water
ISSN号0269-7491
DOI10.1016/j.envpol.2021.116774
通讯作者Han, Dongmei(handm@igsnrr.ac.cn)
英文摘要Water quality is of great concern under the threats of an abandoned PbeZn mine within a vulnerable karst area. This study focuses on tracing the sources, migration and relevant geochemical controls of heavy metals along with surface- and groundwater flow, and assessing their hazards posed to the environment by indexes of heavy metal pollution (HPI) and ecological risks (ERI). We analyzed the concentrations of lead (Pb), zinc (Zn), cadmium (Cd) and copper (Cu) in filtered and digested surface water (SW) and groundwater (GW) samples. Whilst sulfate concentrations, delta S-34(SO4) isotope, and other physical-chemical parameters were measured in filtered SW and GW. Clearly elevated concentrations of Zn and Cd have been observed in the upstream of the Sidi River (max. 1540.3/1676.7, and 19.9/19.4 mu g/L, for filtered/digested contents, respectively), and that of digested Pb and Cu (max. 17.8 and 114.6 mu g/L, respectively) in the downstream karst groundwater. Zn and Cd are likely introduced by the Sidi River which is found mostly in the dissolved phase. While Pb and Cu are sourced from the remobilization of upper lying polluted soil which mostly existed in the particulate phase. Zn and Cd concentrations in the karst groundwater peak at the losing section while Pb and Cu in the river peaks at the gaining section as a result of metals transport with SW-GW exchange. Dilution significantly decreases total metals concentration in the non-karst area. Due to the buffer effect caused by carbonates dissolution and bacterial sulfate reduction, a steady neutral pH can reduce the concentrations of the dissolved metals in the karst area. The ERI and HPI assessments show an acceptable level for surface- and groundwater. A long-term observation on the contents of undissolved metals needs to be conducted in karst areas which are threatened by metal(s) mines. (C) 2021 Elsevier Ltd. All rights reserved.
资助项目Outstanding Member Program of the Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS), China[2012040] ; Development Services of Feature Institute Program of CAS[TSYJS01]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000637737100031
出版者ELSEVIER SCI LTD
资助机构Outstanding Member Program of the Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS), China ; Development Services of Feature Institute Program of CAS
源URL[http://ir.igsnrr.ac.cn/handle/311030/161820]  
专题中国科学院地理科学与资源研究所
通讯作者Han, Dongmei
作者单位1.Minist Nat Resources, Ecosyst & Rocky Desertificat Treatment Key Lab, Guilin 541004, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
5.Chinese Acad Geol Sci, Inst Karst Geol, Guilin 541004, Peoples R China
6.Minist Nat Resources & Guangxi, Key Lab Karst Dynam, Guilin 541004, Peoples R China
推荐引用方式
GB/T 7714		 Qin, Wenjing,Han, Dongmei,Song, Xianfang,et al. Sources and migration of heavy metals in a karst water system under the threats of an abandoned Pb-Zn mine, Southwest China[J]. ENVIRONMENTAL POLLUTION,2021,277:14.
APA Qin, Wenjing,Han, Dongmei,Song, Xianfang,&Liu, Shaohua.(2021).Sources and migration of heavy metals in a karst water system under the threats of an abandoned Pb-Zn mine, Southwest China.ENVIRONMENTAL POLLUTION,277,14.
MLA Qin, Wenjing,et al."Sources and migration of heavy metals in a karst water system under the threats of an abandoned Pb-Zn mine, Southwest China".ENVIRONMENTAL POLLUTION 277(2021):14.

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来源：地理科学与资源研究所

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