出版社：Korean Society of Environmental Health and Toxicology
摘要：Perfluorinated Compounds (PFCs) ane anthropogenic compounds found in trace amounts in many environ- mental compartments far from areas of production. Along with the highly persistent nature of PFCs,there are increasing concems over the potential advese ffects of them on the ecosystems. Most of highly fluorinated compounds degrade into PFOS and PFOA that are very stable compounds hard to break down. So,in this sudy, we tried to determine the toxicity of PFOS and PFOA in the trrstrial invertebrate. Acute toxicity test using earthworm,Eisenia fetida,was performed according to the OECD test guideline 207 (Earthworm,Acute Toxi- city Tests). In the 14 day aculte toxicity tests,the highest concentration causing no morality and the lowest con- centration causing 100% mortality of PFOS were 160 and 655 mg/kg (dry weigh),respectively. And the highest concentration causing no mortality and the lowest concentration causing 100% mortality were 500 and 1,690 mg/kg (dry weight),respectively in the PFOA-exposure group. 14 day LCso values were estimated at the level of 365 and 1 000 mg/kg (dry weight) in the PFOS and PFOA-exposed group. These results indicate that under laboratory conditions PFOS is about 3 times more toxic to earthworms than PFOA. Based on known environ- mental concentrations of PFOS in the soil of Korea,which occur in the 0.42 ~ 0.73 ng/L range. there is no appar- ent risk to temestrial invertebrate. earthworms. However,further work is required to investigate long term ffects on these and other terrestrial organisms.
