Transfer kinetics of PFOS to a marine sandworm species via the gut

2015 Fiscal Year Final Research Report

• Project/Area Number: 25340088
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Modeling and technologies for environmental conservation and remediation
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: Sakurai Takeo 国立研究開発法人国立環境研究所, 環境リスク研究センター, 主任研究員 (90311323)
• Co-Investigator(Kenkyū-buntansha): KOBAYASHI Jun 熊本県立大学, 環境共生学部, 准教授 (00414368) ; YABE Tohru 国立研究開発法人国立環境研究所, 生物・生態系環境研究センター, 主任研究員 (50300851)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 汚染質動態とモデリング / 残留性 / 生物蓄積 / 底生動物 / 動力学 / 吸収

Outline of Final Research Achievements

We conducted a study to elucidate the transfer kinetics of perfluorooctanesulfonate (PFOS) to a marine sandworm species via the gut. We established an individual-expousre system, chemical analytical method of PFOS in sandworm and food pellet samples, and the method to spike PFOS to food pellets. We then conducted a trnsfer experiment and kinetically anlyzed the results. We estimated the gut absoprtion efficiency at about 100% and the depuration halflife at 91 days. The depuration was statistically insignificant. The depuration halflife was longer than the results of earlier studies using other aquatic organisms and of a previous experiment of the respiratory uptake of this species. Thus, further investigations, also regarding other perfluoro/polyfluoro-alkyl acid compounds, on the underlying mechanisms of this difference is needed.

Free Research Field

環境科学、環境化学