摘要
污染源中的铵进入地下水后发生各种生物地球化学作用,从而影响铵的运移和转化,应用传统技术难于分辨各种作用,而同位素技术具有独到之处。现就铵进入地下水后发生的各种作用进行了简述,重点介绍了铵的吸附作用和硝化作用及其产生的同位素分馏情况。对地下水铵污染及其同位素研究的国内外现状进行了描述和分析,指出当前地下水中NH4+的运移和转化研究已成为国际上污染水文地质学的前沿课题,而国内对NH4+的研究主要集中在土壤及其下伏包气带,并且铵氮环境同位素技术在地下水中的应用并不是很多。基于以上认识,提出铵污染地下水研究中亟待解决的问题——利用同位素技术研究铵氮在地下水迁移转化过程中发生的生物地球化学作用,继续丰富吸附、硝化等反应在含水层尺度上的认识。
After entering groundwater, the ammonium is converted into other nitrogen forms through various biogeochemistry processes, which affects the migration and transformation of ammonium. It is difficult to distinguish various processes using traditional techniques, while isotope techniques provide powerful tools for identification of nitrogen sources, and transformations. This paper introduces various processes occurring after ammonium entering into groundwater, especially the sorption and nitrification processes as well as isotope fraetionations during these processes.. The present research situation of groundwater ammonium contamination and the application of ammonium nitrogen isotope in groundwater is described in the paper. It is pointed outthat the research of migration and conversion of ammonium has become one of the hydrogeological advanced topics in the world, while in China, researches of ammonium are focused on the soil and the zone of aeration, and the application of ammonium envi-ronmental isotope technique in groundwater is scarce. Finally problems to be solved in the field of the applications of ammonium isotope in groundwater are proposed, including using the isotopic technique to study biogeochemical functions during the ammo-nium migration with groundwater and improving the understanding of sorption and nitrification in the aquifer scale.
出处
《南水北调与水利科技》
CAS
CSCD
2011年第3期129-132,共4页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金资助(40872200)
关键词
铵氮同位素
地下水
铵污染
吸附作用
硝化作用
研究进展
建议
ammonium nitrogen isotopes
groundwater
ammonium pollution
sorption
nitrification
research advances
