铜-EDTA氨-硫代硫酸金溶解体系的电化学分析

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-2023-0110

P. Xiang, G. Ye

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引用次数: 0

摘要

摘要乙二胺四乙酸二钠（EDTA）能与多种金属形成稳定的配合物。为了提高金的浸出率和硫代硫酸盐的消耗率，将EDTA和氨与铜离子结合形成铜-EDTA-氨-硫代硫酸盐体系。采用电化学方法研究了硫代硫酸盐、铜离子、乙二胺四乙酸和极化电压的影响。结果表明，增加硫代硫酸盐、铜离子和EDTA的浓度可以促进金的溶解，加入EDTA后，金的溶解由电化学控制转变为扩散控制。影响顺序为硫代硫酸盐>EDTA>铜离子。纯金浸出实验表明，EDTA-硫代硫酸铜铵体系中金的溶解速率高于EDTA-硫代铜硫酸体系，从而实现了协同浸金。

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Electrochemical analysis of copper-EDTA-ammonia-gold thiosulfate dissolution system

Abstract Ethylenediaminetetraacetic acid disodium (EDTA) can form stable complexes with many metals. To improve the leaching rate of gold and the consumption rate of thiosulfate, EDTA and ammonia were combined with copper ions to form a copper-EDTA-ammonia-thiosulfate system. Electrochemical methods were used to study the effect of thiosulfate, copper ion, EDTA, and polarization voltage. The results showed that increasing the concentrations of thiosulfate, copper ions, and EDTA promoted the dissolution of gold, which changed from electrochemical control to diffusion control after adding EDTA. The order of influence was thiosulfate > EDTA > copper ion. The pure gold leaching experiment showed that the dissolution rate of gold in the EDTA-ammonium-copper thiosulfate system was higher than that in the EDTA-copper-thiosulfuric acid system, thus achieving synergistic gold leaching.

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来源期刊

Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

6.70

自引率

9.30%

发文量

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.