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Distribution and migration of antimony and other trace elements in a Karstic river system, Southwest China
Ling Li;  Hong Liu;  Haixia Li
2018
发表期刊Environmental Science and Pollution Research
卷号25期号:28页码:28061-28074
摘要

Antimony (Sb) usually occurs associated with arsenic, lead, and other metal elements in sulfide deposits, and most is currently being extracted from the Karst areas, southwest China. In these areas, the acid generated from the oxidative dissolution of sulfide minerals is neutralized by the abundant carbonates but little is known about the effect of this process on the geochemical behavior of Sb and other contaminants. In this study, physicochemical properties (pH, EC) and the trace elements (Sb, As, Cu, Pb, Zn, Sr, etc.) concentrations in waters from mining-impacted Karstic environments were determined in order to determine their distribution and migration potential. It was found that pH values ranged from 6.51 to 9.82, and EC values varied from 369 to 1705scm(-1) in river water samples. Waters of various types such as adit waters, flotation drainage, leaching waters, and river waters all contained high concentrations of dissolved trace elements, reaching up to 5475gL(-1)Sb, 1877gL(-1)As, 10,371gL(-1)Zn, 1309gL(-1) Pb, 46gL(-1) Cu, and 1757gL(-1) Sr. The elevated concentrations of dissolved Sr indicated that Sr could be considered as an indicator of oxidative dissolution of sulfide minerals in the Karst rivers. A proportion of the trace elements were removed in the streams in the vicinity of the mine due to adsorption onto particulate matter, whereas migration of trace elements in the downstream of mine area was attributed to dispersion in dissolved forms. Strontium and Sb have a strong hydrophilicity compared to the other elements analyzed; in contrast, Pb had a high affinity for suspended particulate matter (SPM). It was also found that downstream sediments had elevated concentrations of mining-derived trace elements, but there was a significant decrease in concentration of contaminants in aqueous phase, suggesting that contaminant behavior was conservative in the water-sediment systems under the oxic conditions prevailing in these waters. There was a good correlation between Sb and As in water-SPM-sediment system, indicating that Sb and As are homologous in water environment of the study area.

关键词Antimony trace Elements karstic Rivers mining Activities
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8872
专题环境地球化学国家重点实验室
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China
2.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China
3.College of Politics and Law, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
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Ling Li;Hong Liu;Haixia Li. Distribution and migration of antimony and other trace elements in a Karstic river system, Southwest China[J]. Environmental Science and Pollution Research,2018,25(28):28061-28074.
APA Ling Li;Hong Liu;Haixia Li.(2018).Distribution and migration of antimony and other trace elements in a Karstic river system, Southwest China.Environmental Science and Pollution Research,25(28),28061-28074.
MLA Ling Li;Hong Liu;Haixia Li."Distribution and migration of antimony and other trace elements in a Karstic river system, Southwest China".Environmental Science and Pollution Research 25.28(2018):28061-28074.
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