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化工学报  2015 

化学催化法脱除模拟地下水中硝酸盐氮

DOI: 10.11949/j.issn.0438-1157.20141843, PP. 2288-2294

Keywords: 硝酸盐氮,氨氮,脱氮,载体,催化,地下水,化学反应

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Abstract:

利用化学催化对氮污染地下水进行修复,研究了化学催化载体-自制活性催化固体颗粒载体在停留时间(HRT)、pH、进水水质不同的条件下脱氮效能及脱氮机理,建立了脱氮反应动力学模型,提出了化学催化载体脱除地下水中硝酸盐氮的反应为三级反应,且水中氨氮初始浓度对硝酸盐氮的还原有抑制作用。试验结果表明:当HRT为2h,在酸性、中性和碱性条件下,硝酸盐氮去除率均可达到90%左右;与一般铁碳微电解和零价铁脱氮相比,反应更为迅速,且不需调节pH。

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