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重金属杂质对磷酸铵镁结晶法处理制药废水的影响

Keywords: 磷酸铵镁,杂质,制药废水,晶种

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Abstract:

磷酸铵镁沉淀法处理废水时常受众多因素影响,其中重金属类杂质对该过程影响较大。实验研究了Mn2+、Cu2+杂质存在条件下,用该法去除制药废水中PO43-、NH4+污染物,同时,用XRD、XRF、SEM等手段研究了所得鸟粪石晶体特征。结果表明,pH为9.5时,Mn2+、Cu2+杂质存在条件下,PO43-去除率分别为88%和85%,投加晶种有利于回收特定晶形鸟粪石,Cu2+对磷酸铵镁结晶过程的影响较Mn2+存在时显著。

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