水源水库沉积物中氮的形态分布特征研究  

Distributive characteristics of nitrogen forms in sediment of water source reservoir

作　　者：王禄仕 柴蓓蓓[2] 刘虹[2] 

机构地区：[1]西安水务(集团)有限责任公司,陕西西安710061 [2]西安建筑科技大学环境与市政工程学院,西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2010年第5期734-740,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家重大科技专项资金资助项目(2009ZX07424-006);西安市科技计划资金资助项目(SF08022);国家863高技术研究发展计划资金资助(2007AA06Z302)

摘　　要：采用分级连续浸取分离法研究了西安某水源水库在表层天然沉积物中氮的形态分布特征.研究结果表明:可转化态氮平均含量占总氮平均含量的41%.强氧化剂提取态氮(SOEF-N)是可转化态氮的主要存在形态,平均含量占可转化态氮平均含量的69%;弱酸提取态氮(WAEF-N)次之,占13%;离子交换态氮(IEF-N)与强碱提取态氮(SAEF-N)所占比例最少,均为9%.四种形态氮对氮的界面循环贡献的顺序从大到小依次为:SOEF-N>WAEF-N>IEF-N和SAEF-N.Nitrogen forms in reservoir sediments play an important role in its biogeochemical cycling.The distributive characteristics of different forms of nitrogen in natural grain size sediments of source water reservoir,taking one reservoir in Xi′an City as an example,were investigated employing the sequential extraction technique used in marine sediments.The results show that the transferable nitrogen’s mean content covers 41% of total nitrogen content,and for each sample point the percentage ranges from 28.8% to 49.34%.SOEF-N,which covers 69% of transferable nitrogen,is the dominant form of transferable nitrogen and is followed by WAEF-N,covering 13%.IEF-N and SAEF-N,both covering 9%,are the least.Contribution degree of nitrogen form to recycling varies with time scale.The absolute contribution is decided by its content in sediments,which has the sequence of SOEF-NWAEF-NIEF-N and SAEF-N.

关 键 词：水源水库 沉积物 氮的形态 可转化态氮 

分 类 号：X524[环境科学与工程—环境工程]