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毛格, 周君蕊. 某金属矿区尾矿库水环境治理方案[J]. 2024, 16(2): 86-91+102.
为了解决金属矿区“磺水”污染的突出问题,采集了陕西省某金属矿区尾矿库废水,分析其水质现状,结合废水污染特点、废水处理方法和废水处理经济性等因素,提出合理的处理工艺。结果发现:尾矿库废水中NH3-N、COD、F-、SS、Zn、Cr6+存在不同程度超标,但“磺水”产生的主要原因是由于Fe3+生成的沉淀。提出了“中和+曝气+沉淀”处理工艺,Fe2+将Cr6+还原为Cr3+
Fe2+被氧化为Fe3+
Cr3+和Fe3+最终分别转化为Cr(OH)3沉淀、Fe(OH)3沉淀,废水中的Fe3+和Cr6+被有效去除,实现达标排放。
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