수환경 내 용존성 유기물질의 총 유기탄소 및 총 질소 안정동위원소 신규 분석법 소개

서지정보

ㆍ발행기관 : 한국하천호수학회 ㆍ수록지정보 : 생태와 환경 / 56권 / 4호
ㆍ저자명 : 박시영, 최희주, 홍서연, 임보라, 최서영, 김은미, 허유정, 이수형, 김민섭

목차

서 론
분석 원리 및 정도관리
1. TOC/TN-IR/MS (Total Organic Carbon/Nitrogen -Isotope Ratio Mass Spectrometry, 총 유기탄소/질소 안정동위원소 질량분석기) 소개
2. 표준물질을 이용한 TOC/TN-IR/MS 분석기기의정밀/정확도 연구
결과 및 고찰: 환경시료에의 적용
1. 시료 농도 변화에 따른 안정동위원소비의 정밀 · 정확도연구
2. 기원조사 연구 및 형광 기법과의 비교 검토
적 요
REFERENCES

영어 초록

Dissolved organic matter (DOM) is a key component in the biogeochemical cycling in freshwater ecosystem. However, it has been rarely explored, particularly complex river watershed dominated by natural and anthropogenic sources, such as various effluent facility and livestock. The current research developed a new analytical method for TOC/TN (Total Organic Carbon/Total Nitrogen) stable isotope ratio, and distinguish DOM source using stable isotope value (δ13C-DOC) and spectroscopic indices (fluorescence index [FI] and biological index [BIX]). The TOC/TN-IR/MS analytical system was optimized and precision and accuracy were secured using two international standards (IAEA-600 Caffein, IAEA-CH-6 Sucrose). As a result of controlling the instrumental conditions to enable TOC stable isotope analysis even in low-concentration environmental samples (<1 mgC L-1), the minimum detection limit was improved. The 12 potential DOM source were collected from watershed, which includes top-soils, groundwater, plant group (fallen leaves, riparian plants, suspended algae) and effluent group (pig and cow livestock, agricultural land, urban, industry facility, swine facility and wastewater treatment facilities). As a result of comparing characteristics between 12 sources using spectroscopic indices and δ13C-DOC values, it were divided into four groups according to their characteristics as a respective DOM sources. The current study established the TOC/TN stable isotope analyses system for the first time in Korea, and found that spectroscopic indices and δ13C-DOC are very useful tool to trace the origin of organic matter in the aquatic environments through library database.

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