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多核复合聚铝絮凝剂对水体残留铝的影响

Keywords: 复合絮凝剂,残留铝,处理成本

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Abstract:

采用分别添加金属离子Fe3+和Zn2+的方法制备多核复合型絮凝剂聚合氯化铝铁(PAFC)和聚合氯化铝锌(PAZC),并与市售聚合氯化铝(PAC)比较处理高岭土模拟水样后出水残留铝浓度,得出复合絮凝剂具有更低的出水余铝量及更宽的pH适用范围以及更低的投加量。达到85%COD去除率,PAZC、PAFC和PAC用量分别为5、10和20mg/L;处理后出水残余铝量分别为0.04、0.09和0.14mg/L;处理成本分别为0.020、0.028和0.048元/t。

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