化学催化法脱除模拟地下水中硝酸盐氮  

Chemical catalytic performance on nitrate removal of simulated groundwater

作　　者：李德生[1] 胡倩怡 崔玉玮 邓时海[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《化工学报》2015年第6期2288-2294,共7页CIESC Journal

基　　金：国家自然科学基金项目(51278034)~~

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)、p H、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p H。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 p H 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 p H.

关 键 词：硝酸盐氮 氨氮 脱氮 载体 催化 地下水 化学反应 

分 类 号：X703[环境科学与工程—环境工程]