黄铁矿在酸性镍(Ⅱ)溶液中的电化学氧化行为

Electrochemical oxidation behavior of pyrite in acidic Ni(Ⅱ)ion solutions

针对黄铁矿氧化机理的研究较多,但尚未有学者对黄铁矿在酸性Ni^(2+)溶液中的氧化行为进行研究。利用开路电位测量、线性伏安扫描及电化学阻抗谱等各种电化学测试技术,探讨了黄铁矿在酸性Ni^(2+)溶液中的电化学氧化行为。试验结果表明:黄铁矿电极的开路电位随Ni^(2+)浓度的增大而减小,腐蚀电流密度随Ni^(2+)浓度的升高而增大,黄铁矿电极表面氧化速率随Ni^(2+)浓度的增大而加快。

The study of the oxidation mechanism of pyrite is much,but no investigation has been made on the oxidation behavior of pyrite in the presence of Ni^(2+)in acidic solutions.Various electrochemical test techniques such as open-circuit potential measurements,linear voltammetric scanning,and electrochemical impedance spectroscopy were used to investigate the electrochemical oxidation behavior of pyrite in an acidic Ni^(2+)solution.The experimental results show that the open-circuit potential of pyrite electrode decreases with increasing Ni^(2+)concentration,that the corrosion current density increases with increasing Ni^(2+)concentration,and that the oxidation rate of pyrite eletrode surface accelerates with increasing Ni^(2+).