摘要
黄铁矿和黄铜矿在溶液中发生原电池反应时,黄铁矿静电位高充当阴极,得到保护;黄铜矿静电位低充当阳极,加剧氧化。采用三电极体系对黄铁矿和黄铜矿构成的原电池反应的腐蚀电流密度和混合电位进行了研究,结果表明:原电池的腐蚀电流密度随流动介质中氧化性离子(如Cu2+)浓度增加、流速增大而增大,混合电位随流动介质中氧化性离子(如Cu2+)浓度增加、流速增大而变得越来越正。实验结果对矿山环境污染治理有指导意义。结合原电池模型、混合电位理论和Butler-Volm er方程从理论上对实验结果进行了解释。
When galvanic interaction between pyrite and chalcopyrite occurs in the solution, pyrite has a higher electrostatic potential and acts as a cathode while chalcopyrite has a lower electrostatic potential and forms the anode, which intensifies the oxidation. A three - electrode system was adopted to investigate the corrosion current density and mixed electrical potential of the galvanic cell made up of pyrite and chalcopyrite. The results showed that the corrosion current density of the galvanic cell increased with the increase in the concentration of oxidizing ions （ e. g. Cu^2＋ ） and the flowing rate in the system ; and the mixed electrical potential became positive with the increase of the concentration of oxidizing ions （ e. g. Cu^2＋ ） and the flowing rate in the system. The experimental results arc of directive significance to the control of mine encironmental pollution. Theoretical explanation is made of the experiment results in combination with the galvanic cell, mixed electrical potential theory and Buher - Volmer equation.
出处
《金属矿山》
CAS
北大核心
2006年第4期73-76,80,共5页
Metal Mine
基金
中国科学院知识创新工程重要方向项目(编号:KZCX3-SW-124)。
