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Pyrite oxidation under simulated acid rain weathering conditions | |
Kai Zheng; Heping Li; Luying Wang; Xiaoying Wen; Qingyou Liu | |
2017 | |
Source Publication | Environmental Science and Pollution Research
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Volume | 24Issue:27Pages:21710–21720 |
Abstract | We investigated the electrochemical corrosion behavior of pyrite in simulated acid rain with different acidities and at different temperatures. The cyclic voltammetry, polarization curve, and electrochemical impedance spectroscopy results showed that pyrite has the same electrochemical interaction mechanism under different simulated acid rain conditions, regardless of acidity or environmental temperature. Either stronger acid rain acidity or higher environmental temperature can accelerate pyrite corrosion. Compared with acid rain having a pH of 5.6 at 25 degrees C, the prompt efficiency of pyrite weathering reached 104.29% as the acid rain pH decreased to 3.6, and it reached 125.31% as environmental temperature increased to 45 degrees C. Increasing acidity dramatically decreases the charge transfer resistance, and increasing temperature dramatically decreases the passivation film resistance, when other conditions are held constant. Acid rain always causes lower acidity mine drainage, and stronger acidity or high environmental temperatures cause serious acid drainage. The natural parameters of latitude, elevation, and season have considerable influence on pyrite weathering, because temperature is an important influencing factor. These experimental results are of direct significance for the assessment and management of sulfide mineral acid drainage in regions receiving acid rain. |
Keyword | Pyrite Simulated Acid Rain Weathering Ph Drainage |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/7741 |
Collection | 地球内部物质高温高压实验室 |
Affiliation | 1.Key Laboratory of High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2.University of Chinese Academy of Sciences, Beijing 100039, China |
First Author Affilication | 中国科学院地球化学研究所 |
Corresponding Author Affilication | 中国科学院地球化学研究所 |
Recommended Citation GB/T 7714 | Kai Zheng;Heping Li;Luying Wang;Xiaoying Wen;Qingyou Liu. Pyrite oxidation under simulated acid rain weathering conditions[J]. Environmental Science and Pollution Research,2017,24(27):21710–21720. |
APA | Kai Zheng;Heping Li;Luying Wang;Xiaoying Wen;Qingyou Liu.(2017).Pyrite oxidation under simulated acid rain weathering conditions.Environmental Science and Pollution Research,24(27),21710–21720. |
MLA | Kai Zheng;Heping Li;Luying Wang;Xiaoying Wen;Qingyou Liu."Pyrite oxidation under simulated acid rain weathering conditions".Environmental Science and Pollution Research 24.27(2017):21710–21720. |
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