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J Korean Soc Environ Eng > Volume 38(6); 2016 > Article
J Korean Soc Environ Eng 2016;38(6): 317-322. doi: https://doi.org/10.4491/KSEE.2016.38.6.317
PFOS 대체물질의 환경유해성에 관한 연구
최봉인1,†, 정선용2, 나숙현2, 신동수3, 유병택1
1한국환경공단 환경안전센터
2전남대학교 환경에너지공학과
3창원대학교 화학과
Study on Environmental Hazards of Alternatives for PFOS
Bong-In Choi1,†, Seon-Yong Chung2, Suk-Hyun Na2, Dong-Soo Shin3, Byung-Taek Ryu1
1Environmental Safety Center, Korea Environmental Corporation, Incheon, Korea
2Department of Environment and Energy Engineering, Chonnam National University College of Engineering
3Department of Chemistry, Changwon National University
Corresponding author  Bong-In Choi ,Tel: 032-590-4770, Fax: 032-590-4990, Email: bongin@keco.or.kr
Received: April 12, 2016;  Revised: April 20, 2016;  Accepted: April 25, 2016.  Published online: June 30, 2016.
ABSTRACT
While PFOS sodium salt (C8F17SO3Na) was not degraded by microorganisms for 28 days, the 4 alternatives were biodegraded at the rates of 21.6% for C25F17H32S3O13Na3, 20.5% for C15F9H21S2O8Na2, 15.8% for C23F18H28S2O8Na2 and 6.4% for C17F9H25S2O8Na2, respectively. The acute toxicity test using Daphnia magna was conducted for 48 hours, the half effective concentration (EC50) of PFOS sodium salt (C8F17SO3Na) was evaluated in 54.5 mg/L. While the 4 alternatives did not show any effect at 500.0 mg/L. The surface tension of the PFOS salt (C8F17SO3Na) is 46.2 mN/m at a concentration of 500.0 mg/L. While the surface tension of the 4 alternatives was found to be superior to PFOS sodium salt (C8F17SO3Na). The surface tension of C23F18H28S2O8Na2 (20.9 mN/m) has the lowest, followed by C15F9H21S2O8Na2 (23.4 mN/m), C17F9H25S2O8Na2 (27.3 mN/m), C25F17H32S3O13Na3 (28.2 mN/m). The four kinds of alternatives (C15F9H21S2O8Na2, C17F9H25S2O8Na2, C23F18H28S2O8Na2, C25F17H32S3O13Na3) were found to be superior to PFOS sodium salt (C8F17SO3Na) in terms of biodegradation, Daphnia sp. acute toxicity and surface tension, and thus they were considered applicable as PFOS alternatives. Especially biodegradation rate of C15F9H21S2O8Na2, C23F18H28S2O8Na2 and C25F17H32S3O13Na3 was relatively high as 15.8~21.6%, and Daphnia sp. acute toxicity and surface tension were considerably superior (surface tension 39~55%) to PFOS sodium salt. Therefore, these alternatives are considered to be available as an alternative of PFOS.
Key Words: Alternatives, Persistent Organic Pollutants, PerFluorOoctaneSulfonic Acid (PFOS)
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