Catalytic effect of silver on arsenic-containing copper sulfide dissolution in acidic solution

Hajime Miki, Akinobu Iguchi, Tsuyoshi Hirajima, Keiko Sasaki

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)


Catalytic effects of silver on the dissolution of arsenic-containing copper sulfides such as enargite in acidic media were investigated. Leaching experiments showed that silver increased the enargite dissolution rate, and that the dissolution behavior was potential-dependent. The addition of silver ions and silver sulfide greatly enhanced enargite dissolution. Such behavior can be explained based on the following reaction model: enargite dissolution is enhanced by silver as the silver ions remove the hydrogen sulfide produced during enargite reduction, giving the more amenable copper sulfide. Thermodynamic calculations suggested that the addition of silver ions and controlling the potential would maintain a high enargite dissolution rate. Leaching experiments were therefore performed with the addition of silver sulfide and potential control using an automatic titration apparatus. Experimental results showed that a combination of these two factors gave high enargite dissolution; i.e., 75% copper was dissolved in 24 h at 0.750-0.850 V vs. the standard hydrogen electrode at 303 K.

出版ステータス出版済み - 6月 1 2016

!!!All Science Journal Classification (ASJC) codes

  • 産業および生産工学
  • 金属および合金
  • 材料化学


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