Despite the consumption of disinfectants have been increased by COVID-19 pandemic, the fate of the chemicals in aquatic food webs are still unclear. In order to understand the trophic transfer of the chemicals, the concentration of disinfectants including six benzalkonium chloride (BACs) and five didecyldimethylammonium chlorides (DDACs) were measured at the Geum (2020), Han (2021), and Yeongsan River (2021), before and after rainfall. The highest concentration of ΣBACs (mainly C12 and C14) and ΣDDACs (mainly C10 and C14) were observed in the Han River, followed by Yeongsan River, Geum River Estuary, and Gapcheon. After rainfalls, both concentration and detection frequency were decreased in all sites. Although the BAC and DDAC seems to be accumulated in organisms, they were bio-diluted rather than magnified in the aquatic food web with the biomagnification factor (BMF) of less than 1, trophic magnification slope (TMS) from - 0.236 to 0.001, and trophic magnification factor (TMF) from 0.85 to 1.01.

Abstract
서 론
재료 및 방 법
    1. 조사지역 및 어류채집
    2. 소독제 성분 분석
    3. 총 질소안정동위원소비 분석을 이용한BMF와 TMS 계산
    4. 통계 분석
결과 및 고 찰
    1. 어류의 BAC와 DDAC 농도
    2. 먹이망 내 생물 축적 경향성: BMF와 TMS
적 요
REFERENCES

• 조하은(한양대학교 해양융합과학과) | Ha-Eun Cho (Department of Marine Sciences and Convergent Technology, Hanyang University)
• 김도균(한양대학교 해양융합과학과) | Dokyun Kim (Department of Marine Sciences and Convergent Technology, Hanyang University)
• 원은지(한양대학교 해양융합과학과, 한양대학교 해양대기과학연구소) | Eun-Ji Won (Department of Marine Sciences and Convergent Technology, Hanyang University, Institute of Ocean & Atmospheric Science, Hanyang University)
• 조형욱(한경대학교 산학협력단 한 살림농식품분석센터) | Hyeong-Wook Jo (Hansalim Agri-food Analysis Center, Hankyong National University Industry Academic Cooperation Foundation)
• 안광국(충남대학교 생명과학과) | Kwang-Guk An (College of Bioscience and Biotechnology, Chungnam National University)
• 신경훈(한양대학교 해양융합과학과, 한양대학교 해양대기과학연구소) | Kyung-Hoon Shin (Department of Marine Sciences and Convergent Technology, Hanyang University, Institute of Ocean & Atmospheric Science, Hanyang University) Corresponding author