环境工程学报2013，Vol.7Issue(8)：2931-2936,6.
多介质渗透反应格栅中氨氮的转化与存在形态
Transformation and existing form of ammonia-N in a multi-media permeable reactive barrier
摘要
Abstract
In the process of using permeable reactive barrier to remediate ammonia-N pollution in the groundwater,in order to control different media' s effect and nitrogen transformation process in multi-media permeable reactive barrier,it was important to understand the transformation and existing form of ammonia-N in different media environments.Natural river sand,oxygen releasing compounds,clinoptilolite and sponge iron were selected as reaction media to simulate the transformation and fate of ammonia-N in various media environments,which influent concentrations were about 10 mg/L in the simulative groundwater.The experimental results showed that,in natural river sand layer,ammonia-N was prior adsorbed and fixed by river sand,however,the removal quantity was limited (△ C ＜ 1.5 mg/L).Ammonia-N mainly dissolved in the simulative groundwater with ionic form.In aerobic clinoptilolite layer,ammonia-N was nearly completely removed by the clinoptilolite adsorption and bio-nitrification,the effluent ammonia-N concentration was less than 0.01 mg/L,and the main form of nitrogen was nitrate-N(C =10 ～26.6 mg/L).In iron anaerobic layer,part of nitrate-N was converted to ammonia-N (△ C =2 ～ 9.5 mg/L) and N2 (△ C ＜ 8 mg/L),respectively by chemical reduction with sponge iron and bio-denitrification,and the rest of nitrate-N still dissolved in the simulative groundwater with ionic form.关键词
地下水/氨氮/多介质渗透反应格栅/存在形态Key words
groundwater/ ammonia-N / multi-media permeable reactive barrier/ existing form分类
资源环境引用本文复制引用
杨应钊,刘菲,孔祥科,李圣品,马剑飞..多介质渗透反应格栅中氨氮的转化与存在形态[J].环境工程学报,2013,7(8):2931-2936,6.基金项目
国家水体污染控制与治理科技重大专项(2009ZX07424-002) （2009ZX07424-002）
