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

作者：LI Yang,KANG Feng-Xin,ZOU An-de

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 Dong5e hydrogeological unit. The results show that: Higher content of NO3^- detected in shallow groundwater is 27.77 mg/L on average and δ^15N content ranges from 7.8‰ to 12 ‰, indicating that shallow groundwater is mainly contaminated by sewage or feces. In contrast, less NO3^- in deep groundwater (karst water) has an average value of 12.81 mg/L and δ^15N 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.

发文机构：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

关键词：NITROGENISOTOPEGROUNDWATERNITROGENPOLLUTIONsourceAGRICULTURALarea

分类号： TV[水利工程]