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Influence of pH, Pb2+, and temperature on the electrochemical dissolution of galena: environmental implications
Guoheng Jin; Luying Wang; Kai Zheng; Heping Li; Qingyou Liu
2016
发表期刊Ionics
卷号22期号:6页码:975-984
摘要
We investigated the influence of pH, Pb2+, and temperature on the electrochemical dissolution of galena. The experimental results showed the following: (1) Acidic or alkaline conditions stimulate galena electrochemical dissolution. The galena electrode corrosion current density (j (corr)) increased from 0.072 to 0.143 mu A center dot cm(-2) as the pH decreased from 6.0 to 2.0 (promotion efficiency of 98.61 %) and from 0.066 to 0.132 mu A center dot cm(-2) as the pH increased from 8.0 to 12.0 (promotion efficiency of 100 %). (2) Pb(NO3)(2) promotes galena electrochemical dissolution at low concentrations (< 0.10 mol center dot L-1) and inhibits it at high concentrations (> 0.10 mol center dot L-1) because Pb2+ has two different functions during galena electrochemical dissolution. (3) Higher temperatures are favorable for galena electrochemical dissolution. The galena j (corr) increased from 0.143 to 0.226 mu A center dot cm(-2) as the temperature increased from 25 to 55 A degrees C. These experimental results are of direct significance for the control of environmental pollution during galena weathering and mining activities.
关键词Galena Ph Temperature Electrochemical Environmental
学科领域地球深部物质与流体作用地球化学
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/352002/6493
专题地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
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GB/T 7714
Guoheng Jin,Luying Wang,Kai Zheng,et al. Influence of pH, Pb2+, and temperature on the electrochemical dissolution of galena: environmental implications[J]. Ionics,2016,22(6):975-984.
APA Guoheng Jin,Luying Wang,Kai Zheng,Heping Li,&Qingyou Liu.(2016).Influence of pH, Pb2+, and temperature on the electrochemical dissolution of galena: environmental implications.Ionics,22(6),975-984.
MLA Guoheng Jin,et al."Influence of pH, Pb2+, and temperature on the electrochemical dissolution of galena: environmental implications".Ionics 22.6(2016):975-984.
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