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Effects of an abandoned Pb-Zn mine on a karstic groundwater reservoir
Qin, Wenjing1,2; Han, Dongmei1,3; Song, Xianfang1,3; Engesgaard, Peter4
2019-05-01
Source PublicationJOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
Volume200Pages:221-233
Corresponding AuthorHan, Dongmei(handm@igsnrr.ac.cn)
AbstractThe release and transport of metals in active mines pose a threat to water quality when mine sites become abandoned. Karst aquifer systems are especially vulnerable due to their ability to quick transport polluted water over large distances through surface and subsurface routes. Surface and groundwater samples collected from the Guilin-Yangshuo Basin in southwestern China were analyzed for delta O-18 and delta H-2 of water, major and trace elements, including Sr, pH, temperature, and electrical conductivity to gain an understanding of how an abandoned Pb-Zn mine and its tailing deposits influence the groundwater quality of a downgradient karst carbonate aquifer. The delta O-18 and delta H-2 values of the water samples indicate that the karst aquifer is dominantly recharged by local precipitation during the wet season and additionally by water from upstream mountainous areas during the dry period. Severe heavy metal contamination (9154, 1081, 37 and 55 mu g/L of Zn, Mn, Ni and Cd, respectively) was detected in the mine drainage water. Ninety-one percent of the downstream surface samples and 67% of the groundwater samples collected during the dry season exceeded the limit value for As (10 mu g/L) according to the China Standards for Drinking Water Quality. Factor analysis was applied, and showed the river and groundwater were affected by the Pb-Zn mine and its tailing deposits and by carbonate dissolution. The Sidi River plays an important role in trace element transport, which supported by a strong correlation between sulfate and strontium (with r(2) = 0.85 in the dry season; r(2) = 0.94 in the wet season). The strong acid generated during sulfide oxidation of the mine tailings is neutralized by carbonate rock dissolution, resulting in neutral to alkaline water which hinders the mobility of trace elements. However, the increasing sulfate contents and the elevated total trace element concentrations (from undetectable to 1503 mu g/L except for the mine drainage with 10,350 mu g/L) confirm the release of toxic metals into the water system. In addition, adsorbed arsenate anions may exchange with dissolved carbonate anions and be released into the groundwater.
KeywordAbandoned Pb-Zn mine Karst water Trace elements Arsenic
DOI10.1016/j.gexplo.2018.09.007
WOS KeywordMINING ACTIVITY ; GEOCHEMICAL EVOLUTION ; RIVER WATERS ; HEAVY-METALS ; CARBONATE ; QUALITY ; BASIN ; POLLUTION ; SOIL ; CONTAMINATION
Indexed BySCI
Language英语
Funding ProjectZhu Kezhen Outstanding Young Scholars Program in the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS)[2015RC102] ; Youth Innovation Promotion Association, CAS[2012040] ; Development Services of Feature Institute Program of CAS[TSYJS01]
Funding OrganizationZhu Kezhen Outstanding Young Scholars Program in the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, CAS ; Development Services of Feature Institute Program of CAS
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000460904500018
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49340
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHan, Dongmei
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.Univ Copenhagen UCPH, Dept Geosci & Nat Resource Management IGN, DK-1350 Copenhagen, Denmark
Recommended Citation
GB/T 7714
Qin, Wenjing,Han, Dongmei,Song, Xianfang,et al. Effects of an abandoned Pb-Zn mine on a karstic groundwater reservoir[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2019,200:221-233.
APA Qin, Wenjing,Han, Dongmei,Song, Xianfang,&Engesgaard, Peter.(2019).Effects of an abandoned Pb-Zn mine on a karstic groundwater reservoir.JOURNAL OF GEOCHEMICAL EXPLORATION,200,221-233.
MLA Qin, Wenjing,et al."Effects of an abandoned Pb-Zn mine on a karstic groundwater reservoir".JOURNAL OF GEOCHEMICAL EXPLORATION 200(2019):221-233.
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