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环境化学  2015 

镍/铁和铜/铁双金属降解四氯乙烯的研究

Keywords: 镍/铁,铜/铁,四氯乙烯,脱氯

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Abstract:

选用镍/铁和铜/铁双金属对四氯乙烯(PCE)进行脱氯试验.结果表明,双金属系统对四氯乙烯有明显的脱氯作用,且脱氯反应符合准一级反应动力学方程,双金属在降解PCE的过程中,无三氯乙烯(TCE)、二氯乙烯(DCE)和氯乙烯(VC)等中间产物形成,与零价铁系统相比,双金属系统对PCE的降解速率有明显提高,尤其是Ni/Fe双金属,反应速率常数kSA从01289ml·m-2·h-1提高到0.3697ml·m-2·h-1,Cu/Fe双金属的反应速率常数kSA为0.2279ml·m-2·h-1.无论是哪种反应介质,在制备过程中干燥与否对脱氯速率都有很大的影响.

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