• A Review on Nitrate Source Identification using Isotope Analysis
  • Jeen, Sung-Wook;Lee, Hwan;Kim, Rak-Hyeon;Jeong, Hoon Young;
  • Department of Earth and Environmental Sciences & The Earth and Environmental Science System Research Center, Chonbuk National University;Daeil Engineering and Construction Co., Ltd;Department of Soil and Groundwater, Korea Environment Corporation;Department of Geological Sciences, Pusan National University;
  • 동위원소분석을 이용한 질산염의 오염원 추적에 대한 고찰
  • 진성욱;이환;김락현;정훈영;
  • 전북대학교 지구환경과학과 & 지구환경시스템 연구소;주식회사 대일이앤씨;한국환경공단 토양지하수처;부산대학교 지질환경과학과;
Abstract
Nitrate ($NO_3^-$), a common surface water and groundwater pollutant, poses a serious environmental problem in regions with intensive agricultural activities and dense population. It is thus important to identify the source of nitrate contamination to better manage water quality. Due to the distinct isotope compositions of nitrate among different origins, the dual isotope analysis (${\delta}^{15}N$ and ${\delta}^{18}O$) of nitrate has been widely applied to track contamination sources. This paper provided the underlying backgrounds in the isotope analysis of nitrate, which included typical ranges of ${\delta}^{15}N$ and ${\delta}^{18}O$ from various nitrate sources, isotope fractionation, the analytical methods used to concentrate nitrate from samples, and the potential limitations of the dual isotope analysis along with the resolutions. To enhance the applicability of the dual isotope analysis as well as increase the ability to interpret field data, this paper also introduced several case studies. Furthermore, other environmental tracers including ${\delta}^{11}B$ and $Cl^-/Br^-$ ratios were discussed to accompany the dual isotope analysis for better assignment of contamination sources even when microbial transformation of nitrate and/or mixing between contaminant plumes occur.

Keywords: Nitrate;Isotope analysis;Isotope fractionation;Denitrification;Nitrification;

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