水资源与水工程学报

尹玉龙, 王周锋，王文科, 陈立, 邢萌, 刘卫国.利用氮氧同位素定量识别地下水中硝酸盐来源水资源与水工程学报[J].,2015,26(5):104-108

利用氮氧同位素定量识别地下水中硝酸盐来源

Quantitative identification of nitrate source in groundwater by using nitrogen and oxygen isotope

DOI：10.11705/j.issn.1672-643X.2015.05.020

英文关键词:nitrogen and oxygen isotope sources of nitrate groundwater IsoSource model

基金项目:国家自然科学基金青年基金项目（41202164）

作者	单位
尹玉龙¹, 王周锋¹，王文科¹, 陈立¹, 邢萌², 刘卫国^2,3	(1.长安大学 a.环境科学与工程学院；b.旱区地下水文与生态效应教育部重点实验室；c.陕西省地下水与生态环境工程研究中心，西安 710054； 2.中国科学院地球环境研究所黄土与第四纪地质国家重点实验室，西安 710075；3.西安交通大学人居环境与建筑工程学院，西安 710049)

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中文摘要:

为研究西安市浅层地下水中硝酸盐来源，采集秦岭山前、市郊、市区地下水样，分析其常规化学指标和氮氧同位素，利用硝酸盐氮氧双同位素和IsoSource同位素模型，确定地下水中硝酸盐的主要来源及各个来源的贡献率。研究结果表明：西安市区的硝酸盐主要来源于生活污水粪肥，约占55%~75%；郊区的硝酸盐主要来源是土壤有机氮和生活污水粪肥，分别占37%~55%，36%~58%；而山前地区的硝酸盐主要来源于土壤有机氮转化，约占77%~96%。

英文摘要:

In order to study the nitrate source in shallow groundwater of Xi'an,the paper collected several samples of acquisition underground water from piedmont area of Qingling, suburban, urban of Xi'an,analyzed the conventional chemical index and nitrogen oxygen isotopes. It used the nitrogen and oxygen isotope model of nitrate,Isosource model to identify the main sources of nitrate in groundwater and the ratio every source.The results show that in urban area of Xi'an,the nitrate in groundwater is mainly from animal waste water and sewage, which accounts for from 55% to 75%. In the suburban area, the nitrate in groundwater is mainly from organic nitrogen of soil, animal waste and sewage which is from 37% to 55% and from 36% to 58% respectively. In the piedmont area of Qingling, the nitrate in groungwater is mainly from soil organic nitrogen and the rate is from 77% to 96%.

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