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| 铜离子对银电解的影响 |
| The Effect of Copper Ion on Silver Electrolysis |
| Received:September 10, 2013 |
| DOI： |
| 中文关键词: 有色金属冶金 铜离子 银电解 电导率 线性扫描伏安法 阴极极化 |
| 英文关键词: nonferrous metallurgy copper ion silver electrolysis conductivity liner sweep voltammetry cathodic polarization |
| 基金项目:2010年重大科技成果转化项目(财建[2010]251号)。 |
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| 中文摘要: |
| 采用电导率仪测定不同Cu2+浓度下AgNO3溶液的电导率，应用扫描伏安法研究Cu2+对阴极极化的影响，通过恒电流电解精炼研究Cu2+浓度对电解银粉含铜量的影响。结果表明:AgNO3溶液的电导率随着Cu2+浓度的增加而逐渐升高；Cu2+对银的析出具有抑制作用，随着其浓度的增加银的析出电位负移；电解液Cu2+浓度超过21.3 g/L时，银粉铜含量便会超标；银电解液中的Cu2+浓度在10~20 g/L范围时，对银粉中其他杂质元素Bi、Fe、Pb、Te的析出具有抑制作用。 |
| 英文摘要: |
| Theconductivity of AgNO3 solution with different Cu2+ concentration was measured by conductivity meter. The effect of Cu2+ on cathodic polarization of Ag was investigated by the liner sweep voltammetry. Constant current deposition experiments were used to study the effect of Cu2+ concentration on copper contamination of silver power. The results showed that theconductivity of AgNO3 solution increased with increasing Cu2+ concentration. The Cu2+ has an inhibition effect on reduction of Ag. The cathodic reduction potential of Ag shifted to negative-direction with the increment of Cu2+ concentration. The silver contains an excessive level of copper when Cu2+ concentration is above 21.32 g/L. The content of impurity elements such as Bi, Fe, Pb and Te are lower when Cu2+ concentration is between 10~20 g/L. |
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