黄铁矿在组氨酸、赖氨酸、精氨酸中的电化学氧化机理研究

Electrochemical oxidation mechanism of pyrite in histidine,lysine,and arginine

黄铁矿开采冶炼过程中会产生尾矿废渣,暴露的金属硫化物被氧化后产生的酸性矿山废水污染等环境问题突出。研究黄铁矿的氧化机理,对抑制或阻止酸性矿山废水产生具有重要意义。采用碱性氨基酸作为电解质研究黄铁矿的电化学氧化机理,利用OCP、CV、Tafel极化曲线、LSV、EIS等电化学方法对黄铁矿表面的电化学行为进行测量,验证了黄铁矿在碱性氨基酸体系中氧化的可行性,黄铁矿在3种碱性氨基酸中氧化机理一致,最终发现,黄铁矿在电解质溶液中的氧化速率为赖氨酸>精氨酸>组氨酸。

During pyrite mining,tailings and waste residues are generated,and the oxidation of exposed metal sulfides leads to significant environmental issues such as acid mine drainage pollution.Studying the oxidation mechanism of pyrite is crucial for inhibiting or preventing the formation of acid mine drainage.Alkaline amino acids were used as electrolytes to explore the electrochemical oxidation mechanism of pyrite.Through electrochemical methods such as OCP,CV,Tafel polarization curve,LSV,and EIS,the electrochemical behavior of pyrite surfaces was measured,confirming the feasibility of pyrite oxidation in an alkaline amino acid system.The oxidation mechanisms of pyrite were consistent across the 3 alkaline amino acids,with the oxidation rate of pyrite following the order:lysine>arginine>histidine.