摘要
以黄铜矿为研究对象,利用开路电位(OCP)、循环伏安(CV)法,Tafel极化曲线和交流阻抗(EIS)等电化学方法,对硬脂酸和油酸对黄铜矿表面氧化的钝化过程和钝化机理进行了研究.研究结果表明,硬脂酸和油酸的加入有效抑制了黄铜矿的氧化,其抑制效率分别为58.1%和78.2%.电化学测量结果显示钝化剂的加入并没有改变黄铜矿的表面氧化还原的机理,而是通过在黄铜矿表面形成钝化膜,降低了体系的开路电位从而抑制了黄铜矿表面氧化.
The potential of stearic acid and oleic acid to inhibit the surface oxidation of chalcopyrite was investigated by applying open-circuit potential（OCP） measurement,cyclic voltammetry（CV）,Tafel polarization curve and AC impedance（EIS） methods. The results revealed that the addition of stearic acid and oleic acid inhibited the oxidation of chalcopyrite by 58.1% and 78.2% respectively.Electrochemical measurements showed that the addition of the passivation agents did not change the mechanism of surface oxidation and reduction of chalcopyrite. Rather,a passivation film was formed on the surface of chalcopyrite,which reduced the open-circuit potential of the system and inhibited the surface oxidation of chalcopyrite.
作者
周树林
舒小华
丰顺
刘杰
朱园芳
ZHOU Shulin;SHU Xiaohua;FENG Shun;LIU Jie;ZHU Yuanfang(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, t, 541004, China;College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China)
出处
《环境化学》
CAS
CSCD
北大核心
2018年第5期1079-1088,共10页
Environmental Chemistry
基金
国家自然科学基金(41471270
51569008)
广西科学研究与技术开发计划项目(桂科重14124001-4)资助~~
关键词
黄铜矿
钝化
硬脂酸
油酸
电化学
chalcopyrite
passivation
stearic acid
oleic acid
electrochemical.
