土壤中反硝化作用的试验研究  

Experimental Study on Denitrification in Soil

作　　者：阎胜利[1] 温淑瑶[1] 王瑚[1] 

机构地区：[1]河海大学水文水资源及环境学院,南京210098

出　　处：《河海大学学报（自然科学版）》1998年第2期90-94,共5页Journal of Hohai University(Natural Sciences)

基　　金：水利水电科学基金资助项目(6398)

摘　　要：通过室内土柱试验,研究了土壤中的反硝化作用机理及其影响因素.假设反硝化作用符合一级反应的离散方程,描述土壤中NO_3^-离子的输运迁移规律.此方程反映了NO_3^-浓度、土柱淋溶时间、柱深、反应速率常数和溶液平均流速的函数关系.结果表明,环境条件(如温度,pH值、基质NO_3^-浓度等)是影响反硝化作用反应速率的重要因素.The law of and environmental influencing factors on denitrification in soil have beenstudied through soil-column experiments. Dispersion equations with first-order reaction rates fordenitrification are applied to describe the convective transport of NO3- in soil. In the equations theconcentration of NO3- is considered as a function of position, time, rate constants, and the averagepore water velocity. The results show that environmental conditions, such as temperature, pH, theaverage pore water velocity and the concentration of NO3~ are main factors influencing the rate ofdenitrification.

关 键 词：反硝化作用 土壤 地下水污染 氮转化 

分 类 号：X523[环境科学与工程—环境工程] X144