Isotope analysis of nitrate pollution sources in groundwater of Dong'e geohydrological unit

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英文篇名：Isotope analysis of nitrate pollution sources in groundwater of Dong'e geohydrological unit 作者：LI ; Yang ; KANG ; Feng-Xin ; ZOU ; An-de 英文作者：LI Yang;KANG Feng-Xin;ZOU An-de;Shandong Geophysical and Geochemical Exploration Institute;Shandong Soil Geochemical Engineering Laboratory;Shandong Provincial Bureau of Geology and Mineral Resources;Shandong Provincial Research Center of Geological Survey Technology; 英文关键词：Nitrogen isotope;;Groundwater;;Nitrogen pollution source;;Agricultural area 中文刊名：DXSG 英文刊名：地下水科学与工程(英文版) 机构：Shandong Geophysical and Geochemical Exploration Institute;Shandong Soil Geochemical Engineering Laboratory;Shandong Provincial Bureau of Geology and Mineral Resources;Shandong Provincial Research Center of Geological Survey Technology; 出版日期：2019-06-15 出版单位：Journal of Groundwater Science and Engineering 年：2019 期：v.7;No.25 基金：supported by the Shandong Provincial Natural Science Foundation, China (No. ZR2017QD017);; Special Support for Post-doc Creative Funding in Shandong Province (No. 201502020) 语种：英文; 页：DXSG201902005 页数：10 CN：02 分类号：55-64

摘要

As nitrate pollution in groundwater has become increasingly serious in recent years, nitrogen isotope was adopted in this paper to define its sources in a typical agricultural area of Dong'e hydrogeological unit. The results show that: Higher content of NO_3~- detected in shallow groundwater is 27.77 mg/L on average and δ15 N content ranges from 7.8‰ to 12 ‰, indicating that shallow groundwater is mainly contaminated by sewage or feces. In contrast, less NO_3~- in deep groundwater(karst water) has an average value of 12.81 mg/L and δ15 N content is between 7.2‰ and 14.3‰, which is closely related to human disturbance as mentioned above. In addition, considering relatively low groundwater quality at some monitoring sites, reasonable fertilization is a better choice in the study area to reduce nitrate source in groundwater.
        As nitrate pollution in groundwater has become increasingly serious in recent years, nitrogen isotope was adopted in this paper to define its sources in a typical agricultural area of Dong'e hydrogeological unit. The results show that: Higher content of NO_3~- detected in shallow groundwater is 27.77 mg/L on average and δ15 N content ranges from 7.8‰ to 12 ‰, indicating that shallow groundwater is mainly contaminated by sewage or feces. In contrast, less NO_3~- in deep groundwater(karst water) has an average value of 12.81 mg/L and δ15 N content is between 7.2‰ and 14.3‰, which is closely related to human disturbance as mentioned above. In addition, considering relatively low groundwater quality at some monitoring sites, reasonable fertilization is a better choice in the study area to reduce nitrate source in groundwater.

引文

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