研究者情報

ヒトミ　トシアキ   HITOMI TOSHIAKI   人見敏明    所属   医学部医学科 予防医学    職種   准教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Perfluorinated carboxylic acids discharged from the Yodo River Basin, Japan
掲載誌名	正式名：Chemosphere 略　 称：Chemosphere ISSNコード：00456535
掲載区分	国外
巻・号・頁	138,81-88頁
著者・共著者	Niisoe T, Senevirathna ST, Harada KH, Fujii Y, Hitomi T, Kobayashi H, Yan J, Zhao C, Oshima M, Koizumi A
発行年月	2015/11
概要	We investigated perfluorinated carboxylic acids (PFCAs) with 7-14 carbon atoms (C7-C14) in the Yodo River system in 2013. C7-C11 were detected at most sampling sites. The range and median of total PFCAs (ΣPFCAs) concentrations were 1.0-89.7 and 11.2 ng L(-1), respectively. The dominant component was C8 (average for all samples=53.3±8.8%), followed by C7 (19.2±6.7%) and C9 (17.6±7.1%). The levels of C8 were confirmed to decrease greatly over the last 10 years. We assessed the fluxes in C7-C11 discharged from the basin based on the concentrations in river water and river flow rate. The flux of discharged ΣPFCAs was 237.0 g d(-1) at the most downriver point of the assessment areas. Considering the variability in flow rate due to precipitation, the annual ΣPFCAs flux was estimated to be 86.5-173.4 kg y(-1). Identification and quantification of PFCAs sources is difficult because the strength of the sources changes with time, and available information is quite limited. Further monitoring and investigation are necessary to understand sources of PFCAs, as well as their potential for human exposure.
DOI	10.1016/j.chemosphere.2015.05.060.