再生水中NO_3^--N、NO_2^--N、NH_4^+-N在粉土介质中迁移转化的研究  

Migration and transformation of NO_3^--N,NO_2^--N,and NH_4^+-N of reuse water in silt

作　　者：王永刚[1] 郑凡东[2] 安同艳[1] 史芫芫[1] 孙长虹[1] 

机构地区：[1]北京市环境保护科学研究院,北京100037 [2]北京市水利科学研究所,北京100044

出　　处：《环境污染与防治》2010年第1期43-46,共4页Environmental Pollution & Control

摘　　要：通过土柱实验模拟再生水在粉土层下渗过程中NO3--N、NO2--N、NH4+-N的迁移转化规律。结果表明,实验温度为23.2～25.9℃时,土柱内发生反硝化反应,NO3--N的去除率为9.74%～39.16%,反应符合一级反应动力学方程,衰减系数为0.0968～0.5531m-1;实验温度低于19℃时,土柱内反硝化反应消失,说明低温是制约再生水在土柱内发生反硝化作用的主要因素。The process of reuse water infiltration in silt was simulated with soil-column method, and the migration and transformation of NO3--N、NO2--N and NH4^＋-N in silt were studied. The experiment result showed that denitrification occurred when temperature was 23.2-25.9 ℃, with the NO3^--N removal rate of 9.74%-39.16%. The process of degradation followed the first-order reaction kinetics model, with the attenuation coefficients ranged from 0. 096 8 to 0. 553 1 m^-1. Denitrification process disappeared when the water temperature was lower than 19 ℃, which indicated that lower temperature inhibited the removal of NOa-N.

关 键 词：膜生物反应器 再生水 硝酸盐 反硝化 粉土 地下水 

分 类 号：X703[环境科学与工程—环境工程]