질소 및 산소 안정동위원소 활용 수계 질산성 질소 오염원 판별을 위한기술 절차 제안

Abstract

This study aims to prepare a technical protocol for identifying the source of nitrate in water using nitrogen (δ15N)and oxygen (δ18O) stable isotope ratios. The technical processes for nitrate sources identification are composed of siteinvestigation, sample collection and analysis, isotope analysis, source identification using isotope characteristics, andsource apportionment for multiple potential sources with the Bayesian isotope mixing model. Characteristics of variousnitrate potential sources are reviewed, and their typical ranges of δ15N and δ18O are comparatively analyzed andsummarized. This study also summarizes the current knowledge on the dual-isotope approach and how to correlate thefield-relevant information such as land use and hydrochemical data to the nitrate source identification.