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Geoscience ›› 2022, Vol. 36 ›› Issue (02): 563-573.DOI: 10.19657/j.geoscience.1000-8527.2021.176

• Water Resources and Environmental Research • Previous Articles     Next Articles

Review of Nitrate Source Apportionment and Nitrogen Isotope Fractionation in Groundwater

YU Lu1,2(), ZHENG Tianyuan1,3, ZHENG Xilai1,3()   

  1. 1. College of Environmental Science and Engineering, Ocean University of China, Qingdao, Shandong 266100, China
    2. Ecological Environment Research and Development Center, Weihai Innovation Institute, Qingdao University, Weihai, Shandong 264200, China
    3. Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, Shandong 266100, China
  • Received:2021-09-30 Revised:2022-03-03 Online:2022-04-10 Published:2022-06-01
  • Contact: ZHENG Xilai

Abstract:

Groundwater nitrate (N O 3 -) pollution has become one of the world’s most serious geoenvironmental problems. Comprehensive and accurate identification of N O 3 - sources has important guiding significance for effective groundwater management and pollution prevention. In this study, we reviewed the N O 3 - sources in groundwater, isotope measurement methods, isotope features of pollution sources, quantitative analytical model, N O 3 - transformation process and isotope fractionation. By comparing the development and application of various N O 3 - source apportionment methods, we invoked that comprehensive and multidisciplinary understanding of N O 3 - sources is needed. Isotope enrichment factor is an important parameter to quantify the contribution of N O 3 - sources. The study of isotopic fractionation effect can better interpret the N O 3 - sources and transformation process in the groundwater, and provide reference for accurate tracing and effective prevention of groundwater N O 3 - pollution.

Key words: nitrate, source apportionment, nitrogen cycle, isotope, fractionation

CLC Number: