수질 중 질산성질소의 질소(δ15N)와 산소(δ18O) 안정동위원소비를 이용한 상수원수의 오염원 추적
Identification of Pollutants Sources of Water Supply using Nitrogen (δ15N) and Oxygen (δ18O) Stable Isotope Ratio in Nitrate
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초록
In this study, according to determination of nitrogen (δ15N) and oxygen (δ18O) from nitrate (NO3) in water for 2 years, 2016-2017, Gunwi, Korea, the origin of pollutants in supply water could be found. The sampling sites are including 6 points, Donggok, Yonga, Janggok1 and 2, reservoir of dam and Ingak temple around Gunwi Dam, Korea. The water samples were determined NO3-N using Ion Chromatography and Nitrogen (δ15N) and Oxygen (δ18O) stable isotope ratio in nitrate and isotope ratio mass spectrometry, respectively. The standard deviation of determined standard materials is less than 0.2‰ for δ15NAIR and 0.2‰ for δ18OVSMOW in water. The origin of the supply water pollution was analyzed through the correlation between the values of δ15N and δ18O in nitrate. The values indicated that these sources were originated sewage and livestock manure in the Dam. The dominant contribution of water pollutants was calculated about 50% from Donggok location in this study. In addition, the location of Yonga where has the small inflow rate also constantly contributed to the Dam.
Abstract
In this study, according to determination of nitrogen (δ15N) and oxygen (δ18O) from nitrate (NO3) in water for 2 years, 2016-2017, Gunwi, Korea, the origin of pollutants in supply water could be found. The sampling sites are including 6 points, Donggok, Yonga, Janggok1 and 2, reservoir of dam and Ingak temple around Gunwi Dam, Korea. The water samples were determined NO3-N using Ion Chromatography and Nitrogen (δ15N) and Oxygen (δ18O) stable isotope ratio in nitrate and isotope ratio mass spectrometry, respectively. The standard deviation of determined standard materials is less than 0.2‰ for δ15NAIR and 0.2‰ for δ18OVSMOW in water. The origin of the supply water pollution was analyzed through the correlation between the values of δ15N and δ18O in nitrate. The values indicated that these sources were originated sewage and livestock manure in the Dam. The dominant contribution of water pollutants was calculated about 50% from Donggok location in this study. In addition, the location of Yonga where has the small inflow rate also constantly contributed to the Dam.
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