沟渠沉积物的氮素迁移转化在干涸期和输水期的试验研究  

Research of Nitrogen Transportation and Transformation of Ditch Sediments in Drying and Wetting Period

作　　者：吴建[1] 杨培岭[1] 任树梅[1] 苏艳平[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083

出　　处：《农业环境科学学报》2009年第9期1888-1891,共4页Journal of Agro-Environment Science

基　　金：水利部公益性行业科研专项经费项目(200701025);北京重点学科"水文学与水资源"建设项目;北京市科委2009年度科技项目

摘　　要：沟渠沉积物对水中N的迁移转化有重要作用,本文针对有无植物生长的两种沟渠沉积物在干涸期和输水期对N的吸附、硝化和反硝化效应进行试验研究,探讨了植物(芦苇)在此过程中的作用。结果表明,由于沉积物O2含量、有机质含量等因素的变化,吸附、硝化/反硝化强度在干涸期及输水期均呈现有规律的变化。沟渠的干湿变化不利于沉积物对N的去除,在沟渠输水时,芦苇的生长对沉积物N的迁移转化影响不大。Ditch sediments are important to nitrogen transportation and transformation of water. In this study, nitrogen adsorption and nitrification/denitrification were investigated in the ditches with/without plant during the drying and wetting period. And the effect of plant （bulrush） was also analyzed. The resultsindicated that, nitrogen adsorption and nitrification/denitrification change regularly with the component of sediments, such as O2,organic matters etc. The drying and wetting process is disadvantage of nitrogen removal. The nitrogen transportation and transformation weren＇t obviously effected by the bulrush in the wetting time.

关 键 词：沟渠沉积物 干涸/输水 吸附 硝化 反硝化 

分 类 号：X522[环境科学与工程—环境工程]