title: Transport of perfluoroalkyl acids in a water-saturated sediment column investigated under near-natural conditions.
abstract: The aim of this study was to gain an understanding of the transport of C4-10 perfluoroalkyl carboxylic acids (PFCAs) and C4,6,8 perfluoroalkyl sulfonic acids (PFSAs) in a water-saturated sediment column representing a riverbank filtration scenario under near-natural conditions. Short-chain PFCAs and PFSAs with up to six C-atoms showed complete tracer-like breakthrough. Longer chain ones were retarded due to sorption to the sediment or due to other processes in the aqueous phase. The study reports the first column derived sediment-water partition coefficients ranging from 0.01 cm(3) g(-1) to 0.41 cm(3) g(-1) for C4,6 PFSAs and from 0.0 cm(3) g(-1) to 6.5 cm(3) g(-1) for C4,5,6,8,9 PFCAs. The results clearly indicate that short-chain PFCAs and PFSAs may pose a problem if contaminated surface waters are used for drinking water production via riverbank filtration.
authors: Federal Environment Agency, Wörlitzer Platz 1, 06844 Dessau-Roßlau, Germany; Leuphana University of Lüneburg, Scharnhorststr. 1, 21335 Lüneburg, Germany. Electronic address: Lena.Vierke@uba.de.
authors: Lena
authors: L
authors: Vierke
authors: Helmholtz-Zentrum Geesthacht, Max-Planck Str. 1, 21502 Geesthacht, Germany. Electronic address: a.moeller@gba-laborgruppe.de.
authors: Axel
authors: A
authors: Möller
authors: Federal Environment Agency, Schichauweg 58, 12307 Berlin, Germany. Electronic address: Sondra.Klitzke@uba.de.
authors: Sondra
authors: S
authors: Klitzke
mesh_terms: D002264:Carboxylic Acids / Q000032:analysis; D005466:Fluorocarbons / Q000032:analysis*; D019015:Geologic Sediments / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002264:Carboxylic Acids; D005466:Fluorocarbons; D014874:Water Pollutants, Chemical
keywords: Column study; PFCAs; PFOA; PFSAs; Riverbank filtration; Sediment–water partition coefficient