摘要
采用沉淀—电吸附联合工艺处理高铜高铁提金氰化废水,对处理过程的反应原理和工艺流程进行了系统的分析说明,同时对关键处理结果进行了讨论。研究表明,采用沉淀—电吸附联合工艺处理高浓度氰化提金废水是可行的。经Zn SO4沉淀处理后,废水中Fe2+、Cu2+及游离CN-的沉淀率分别达到100%、85.89%和99.43%。电吸附处理后,废水中的Cu2+、SCN-与游离CN-的去除率分别为98.68%、43.60%和99.57%。经X射线衍射(XRD)分析表明,硫酸锌沉淀后的沉淀物主要由Zn2[Fe(CN)6]、Zn(CN)2和Cu CN组成,而电吸附处理后得到的沉淀物90%以上为Cu SCN,沉淀物及饱和阳极板可经综合处理回收氰化物与金属,同时废水可返回浸出系统循环利用。
Trea tment of gold mine wastewater with the characteristics of cyanide,high copper,iron by the chemical precipitation-electric adsorption combined technology,the analyzed and discussed were focused on the reaction principle,the technological process and the result of the reaction.Research shows that the method is viable to treatment wastewater containing high concentration of cyanide.After precipitation by ZnSO4,the precipitation rate of free cyanide,Fe and Cu in wastewater were 100%,85.89% and 99.43%,respectively.After advanced treatment by electric adsorption,the removal rates of Cu,thiocyanate,and free cyanide were 98.68%, 43.60% and 99.57%,respectively.The XRD analysis showed that the sediment from zinc sulfate precipitate mainly includes Zn2 [Fe（CN）6],Zn（CN）2 and CuCN,and the sediment from the electric adsorption is mainly CuSCN. Sediment and the anode plate after saturated adsorption can be comprehensive treatment and recovery of cyanide and metal,and the wastewater can be returned to the leaching system for recycling at the same time.
出处
《黄金科学技术》
CSCD
2015年第4期75-79,共5页
Gold Science and Technology
基金
国家自然科学基金青年基金项目"离子交换法治理提金尾液中铁的干扰机制及高效解吸机理研究"(编号:51204130)
陕西省教育厅重点实验室专项"煤基电极材料的制备及其在提金尾液综合治理中的应用"(编号:13JS059)联合资助
关键词
氰化废水
硫酸锌
化学沉淀
电吸附
cyanide wastewater
ZnSO4
chemical precipitation
electric adsorption
