Research on biodegradation behavior of precursors of PFOS and PFOA in the aquatic environment

2016 Fiscal Year Final Research Report

• Project/Area Number: 26340088
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental risk control and evaluation
• Research Institution: Center for Environmental Science in Saitama
• Principal Investigator: Motegi Mamoru 埼玉県環境科学国際センター, 化学物質担当, 担当部長 (10415391)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 有機フッ素化合物 / PFOS / PFOA / 前駆物質 / 生分解 / 河川水 / 底質

Outline of Final Research Achievements

Concentrations of both perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) showed decreasing tendencies in river waters in Saitama Prefecture. Fluorotelomer alcohols (8:2FTOH and 10:2FTOH) in a commercial product mainly biotransformed to PFOA and perfluorodecanoic acid (PFDA) in an aerobic water/sediment system by a shake flask batch test. The biotransformation rate from 10:2FTOH to PFDA was slower than that from 8:2FTOH to PFOA. After 336 days of aerobic water/sediment incubation, 73% of PFOS and 3% of PFOA were produced by biotransformation of N-Ethyl perfluorooctane sulfonamidoethanol (N-EtFOSE). The results suggest that these precursors can be considerable pollution sources of PFOS and PFOA in the aquatic environment.

Free Research Field

環境化学