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沉淀—电吸附联合处理氰化提金废水

DOI: 10.11872/j.issn.1005-2518.2015.04.075, PP. 75-79

Keywords: 氰化废水,硫酸锌,化学沉淀,电吸附

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Abstract:

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ZnSO4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CuCN组成,而电吸附处理后得到的沉淀物90%以上为CuSCN,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。

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