|
KMID : 1156220160420020112
|
|
Journal of Environmental Health Sciences
2016 Volume.42 No. 2 p.112 ~ p.117
|
|
|
Biodegradation test of the alternatives of perfluorooctanesulfonate (PFOS) and PFOS salts
|
|
Choi Bong-In
Na Suk-Hyun
Son Jun-Hyo
Shin Dong-Soo
Ryu Byung-Taek
Chung Seon-Yong
|
|
|
Abstract
|
|
|
Objectives: In this study, we investigated the biodegradation rates of 8 perfluorooctanesulfonate (PFOS) alternatives synthesized at the at Changwon National University in comparison to those of PFOS potassium salt and PFOS sodium salt.
Methods: A biodegradability test was performed for 28 days with microorganisms cultured in the good laboratory practice laboratory at the Korea Environment Corporation following the OECD Guidelines for the testing of chemicals, Test No. 301 C
Results: While C5H8F3SO3K, C8F17SO3K and C8F17SO3Na were not degraded after 28 days, the 3 alternatives were biodegraded at the rates of 31.4% for C8H8F9SO3K, 25.6% for C10H8F13SO3K, 23.6% for C25F17H32S3O13Na3, 20.9% for C15F9H21S2O8Na2, 15.5% for C23F18H28S2O8Na2, 8.5% for C17F9H25S2O8Na2 and 4.8% for C6H8F5SO3K. When the concentration was the same(500 mg/L), C23F18H28S2O8Na2 had the lowest tension with 20.94 mN/m, which was followed by C15F9H21S2O8Na2 (23.36 mN/m), C17F9H25S2O8Na2 (27.31 mN/m), C25F17H32S3O13Na3 (28.17 mN/m), C10H8F13SO3K (29.77 mN/m) and C8H8F9SO3K (33.89 mN/m). Having higher surface tension of 57.64 mN/m and 67.57 mN/m, respectively, than those of the two types of PFOS salts, C6H8F5SO3K and C5H8F3SO3K were found valueless as substitute for PFOS.
Conclusion: The biodegradation test suggest that 6 compounds could be used as substitutes for PFOS. 23F18H28S2O8Na2 and C15F9H21S2O8Na2 were found to be the best substitutes based on biodegradation rate and surface tension, followed by C25F17H32S3O13Na3, C8H8F9SO3K and C10H8F13SO3K. C17F9H25S2O8Na2 was found to have relatively low value as an alternative but it still had a potential to substitute the conventional PFOS.
|
|
|
KEYWORD
|
|
|
Alternatives, Persistent organic pollutants, PFOS
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|