摘要
自然界的氮循环已被严重扰乱,失衡的氮循环过程中产生的一些氮氧化物和氮氢化物(如N2O、NO3-、NO2-、NH3、NH4+等)是全球温室效应、水体富营养化和酸雨危害的主要贡献者。稳定氮同位素作为一种有效的示踪手段,在研究氮循环特别是污染氮源的识别方面有重要意义。本文在简要总结氮的同位素分馏效应的基础上,重点论述和分析了稳定氮同位素在植被-土壤-地下水系统和大气系统中的氮源识别,并结合研究现状探讨了研究前景。
The nitrogen cycling in the natural environments has been seriously disturbed due to the industrial and agricultural development and the population increase.Moreover,some nitrogen oxides and hydrides produced in the imbalanced process of nitrogen cycling,such as N2O、NO-3、NO-2、NH3、NH＋4,are the main contributors for three major environmental problems of global warming,water eutrophication and acid rain.As an effective tracing method,stable nitrogen isotope is significant for studying the nitrogen cycling,especially for identifying source of nitrogen pollution.This paper has briefly summarized the nitrogen isotope fractionation effect,reviewed and discussed its applications for tracing and identifying nitrogen sources in the soil-plant-groundwater system and the atmosphere system,and proposed the prospective of the research on the nitrogen isotope for tracing environmental pollution sources.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2007年第3期295-299,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家重点基础研究发展规划项目(2006CB403200)
中国科学院知识创新领域前沿项目(IG-04-01)
国家自然科学基金资助项目(40672112)
关键词
氮稳定同位素示踪
氮污染
氮循环
stable nitrogen isotope
trace
nitrogen pollution
nitrogen cycle
