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氯离子对氨氮电化学氧化的影响

Keywords: PbO2粉末多孔电极,电化学氧化,氨氮,氯离子

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Abstract:

以自制的二氧化铅粉末多孔电极为阳极,不锈钢为阴极,探讨了投加Cl-对氨氮电化学氧化反应速率、途径及产物等的影响。结果表明,投加Cl-能显著提高氨氮的电化学氧化速率;有氯离子存在的条件下,氨氮的去除主要靠电催化过程中产生的强氧化性物质·OH,HClO的作用,其去除率随着电流密度的增大呈增高的趋势,随初始pH的增大而增大;投加氯离子后,NO3--N的生成量增加,但氧化产物主要是以N2为主的含氮气体。

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