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微波-Fenton法处理EDTA-Cu-Ni废水的工况与效能

Keywords: 微波,Fenton,EDTA,重金属

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Abstract:

为了探索微波-Fenton反应体系中的反应机理,进行了正交实验、单因素影响实验和微波-Fenton与水热-Fenton的对比实验。通过正交实验,确定了微波-Fenton法处理络合态重金属废水的主要影响因子为Fe2+投加量、初始pH、H2O2投加量及反应温度,COD与Ni去除效率的影响因子的权重次序一致,而Cu去除的权重次序则与前两者不同;单因素优化实验结果表明,微波-Fenton法处理EDTA-Cu-Ni废水在反应时间为9min时的最优条件为:Fe2+投加量为0.5mmol/L,H2O2投加量为185mmol/L,初始pH为2.5,反应温度为80℃;此时COD:Fe2+:H2O2为1:0.06:15(mg/L),各影响因子对有机物与金属离子的去除影响效应不同;微波水浴对比实验结果表明,在微波-Fenton体系中,微波主要起加热和提高反应速率的作用。

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