金在铜-乙二胺-硫代硫酸盐体系中溶解的电化学分析

IF 3.8 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Green Processing and Synthesis Pub Date : 2023-01-01 DOI:10.1515/gps-2022-8133
P. Xiang, Qiong Liu, C. Deng, G. Ye
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摘要

摘要硫代硫酸盐浸金是一种绿色的黄金提取工艺。本文用电化学方法研究了硫代硫酸盐、铜离子、乙二胺和极化电压对金在该体系中溶解的影响。结果表明,硫代硫酸盐的加入促进了金的溶解,但增加硫代硫酸盐的浓度有很小的附加作用。乙二胺的加入也增加了金的溶解性,但加入乙二胺后金的抗溶解性增加。随着铜离子浓度的增加,金的溶解性增加,扩散电阻增加,分散效果增强。铜-乙二胺-硫代硫酸盐体系在增加极化电压时没有表现出钝化(或只有弱钝化),这表明该体系相对稳定。三个因素对金溶解的影响顺序为硫代硫酸盐>铜离子>乙二胺。
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Electrochemical analysis of the dissolution of gold in a copper–ethylenediamine–thiosulfate system
Abstract Thiosulfate gold leaching is a green gold extraction technology. Here, the effects of thiosulfate, copper ion, ethylenediamine, and polarization voltage on the dissolution of gold in this system were investigated by an electrochemical method. The results showed that the addition of thiosulfate promoted the dissolution of gold, but increasing the thiosulfate concentration had a little additional effect. The addition of ethylenediamine also increased the dissolution of gold, but the dissolution resistance of gold increased after adding ethylenediamine. The dissolution of gold increased, the diffusion resistance increased, and the dispersion effect increased upon increasing the copper ion concentration. The copper–ethylenediamine–thiosulfate system did not display passivation (or only weak passivation) upon increasing the polarization voltage, which indicates that the system was relatively stable. The influence of three factors on the dissolution of gold followed the order thiosulfate > copper ion > ethylenediamine.
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来源期刊
Green Processing and Synthesis
Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
6.70
自引率
9.30%
发文量
78
审稿时长
7 weeks
期刊介绍: Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.
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