Establishment of water quality index(Na^+,Ca^(2+)) for purified water reused to zinc electrolysis process  

作　　者：柴立元 肖海娟 王云燕 裴斐 舒余德 张金龙 

机构地区：[1]School of Metallurgical Science and Engineering,Central South University

出　　处：《中国有色金属学会会刊：英文版》2009年第2期484-488,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(2007BAC25B01) supported by the National Key Project of Scientific and Technical Supporting Programs Funded by Ministry of Science and Technology of China during the 11th Five-Year Plan;Project(308019) supported by the Key Scientific and Technical Project, Ministry of Education of China;Project(08JJ3020) supported by Hunan Provincial Natural Science Foundation of China;Project (50830301) supported by the Key Project of the National Natural Science Foundation of China

摘　　要：The effects of Na+ and Ca2+ in the purified water on the conductivity of zinc electrolyte and the current efficiency of zinc electrolysis were studied by the alternating current bridge method and the simulated electrolysis experiments,and the water quality index of reused water was established. The results show that the conductivity of the solution and the current efficiency decrease as these two kinds of positive ions are added in the electrolyte. The effect of Ca2+ is much more remarkable than that of Na+. ρ(Na+)≤ 8 g/L and ρ(Ca2+)≤20 mg/L are the quality indexes in the zinc electrolysis process and the concentrations of Na+ and Ca2+ in the purified water reused to the process should be less than the limited values,i.e. the water quality index of the purified water should be controlled by its reused amount.The effects of Na^＋ and Ca^2＋ in the purified water on the conductivity of zinc electrolyte and the current efficiency of zinc electrolysis were studied by the alternating current bridge method and the simulated electrolysis experiments, and the water quality index of reused water was established. The results show that the conductivity of the solution and the current efficiency decrease as these two kinds of positive ions are added in the electrolyte. The effect of Ca^2＋ is much more remarkable than that of Na^＋. ρ（Na^＋）≤ 8 g/L and ρ（Ca^2＋）≤20 mg/L are the quality indexes in the zinc electrolysis process and the concentrations of Na＂ and Ca^2＋ in the purified water reused to the process should be less than the limited values, i.e. the water quality index of the purified water should be controlled by its reused amount.

关 键 词：锌电解过程 水质指数 重复使用 净化水 钠 电流效率 水质指标 交流电桥法 

分 类 号：X831[环境科学与工程—环境工程]