| 표적 및 추정 분석을 활용한 낙동강 유역 과불화화합물 모니터링 및 주요 유입 지류 기여도 조사 |
|---|
|
학술지명 환경독성보건학회
저자 이선홍,박혜지,최영훈
발표일 2025-11-14
|
|
This study aims to analyze per- and polyfluoroalkyl substances (PFAS) using target and suspect screening analytical methods, and investigate major tributaries contributing to PFAS pollution in the Nakdong River Basin. The quantitative analytical method was modified based on the US EPA 1633 method, and validated for monitoring 40 PFASs in surface water. The recoveries ranged from 50% to 150% (except for NFDHA, 5 long chain PFASs ), with a relative standard deviation (RSD) of less than 15%. For target screening, seventeen PFASs were detected at least once in surface waters. Among them, PFOA and PFHxA were predominant contaminant in main streams, whereas PFHxA and 5:3FTCA in Jincheon stream. Among them, PFOA and PFHxA were the predominant contaminants in the main streams, whereas PFHxA and 5:3 FTCA were dominant in the Jincheon stream. Compared to the upstream, the sum of PFAS concentrations in the downstream increased by approximately two-fold, and particularly by about ten-fold in the midstream after the inflows of the Geumho River, Baek Stream, and Jincheon Stream. Among the tributaries discharging into the Nakdong River, the Jincheon stream contributed the highest PFAS load, followed by the Geumho River and Baekcheon stream. Additionally, ten emerging PFASs (NMeFBSAA, NMeFBSA, FBSA, NMeFPeSAA, FPeSA, 4:2FTUCA, 4:3FTCA, 4:3FTUCA, 5:3FTUCA, 6:2FTCA) were tentatively identified with confidence levels of 2b or 3 through suspect screening. These compounds were expected to be transformation products of FOSEs and FTOHs, which may ultimately be transformed into PFSAs and PFCAs, respectively. |