Abstract:

In this paper, the nitrogen removal efficiency and mechanism by the chemical catalytic particle carrier, i.e., the self-made active catalytic solid particle carrier and its influence factors such as HRT, initial pH and the quality of influent were studied and analyzed. The reaction kinetic model was established. The result showed that the nitrogen removal by self-made carrier is 3 order reaction and the initial concentration of ammonia in water had inhibitory effect on the reaction. Nitrogen removal rate reached 88.7% when HRT was 2 h, and was up to 90% no matter in acidic, neutral or alkaline conditions. Compared to normal zero-value iron or ferric carbon micro electrolysis, the chemical catalysis particle carrier was more efficient and had no particular requirement on influent pH.

Key words: nitrate, ammonia, nitrogen removal, carrier, catalytic, groundwater, chemical reaction

摘要：

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2 h, 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。

关键词: 硝酸盐氮, 氨氮, 脱氮, 载体, 催化, 地下水, 化学反应