期刊
CHEMOSPHERE
卷 91, 期 6, 页码 725-732出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.02.024
关键词
Groundwater contamination; Persistent organic pollutants; Bioaccumulation; Food chain
资金
- European Fund for Regional Development (EFRE) in the INTERREG IVA-program Germany - The Netherlands
- Ministerium fur Wirtschaft
- Mittelstand und Energie des Landes NRW
- Niedersachsisches Ministerium fur Wirtschaft
- Arbeit und Verkehr
- Niederlandisches Ministerium fur Landwirtschaft, Natur und Lebensmittelsicherheit
- Marktverband fur Vieh, Fleisch und Eier (PVE),
- Lebensmittel- und Warenbehorde (VWA)
- Province Drenthe
- Province Overijssel
- Province Groningen
- Province Fryslan
- Province Gelderland
- Province Nord-Brabant
- Province Limburg
The sorption of perfluorinated compounds (PFCs) to soils and sediments determines their fate and distribution in the environment, but there is little consensus regarding distribution coefficients that should be used for assessing the environmental fate of these compounds. Here we reviewed sorption coefficients for PFCs derived from laboratory experiments and compared these values with the gross distribution between the concentrations of PFCs in surface waters and sediments or between wastewater and sewage sludge. Sorption experiments with perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) suggest that their sorption can be described reasonably well as a partitioning-like process with an average logK(oc) of approximately 2.8 for PFOA and 3.0 for PFOS. However, median concentrations in sediments (PFOA, 0.27 ng g(-1); PFOS, 0.54 ng g(-1)) or sewage sludge (PFOA, 37 ng g(-1); PFOS, 69 ng g(-1)) in relation to median concentrations in surface water (PFOA, 3 ng l(-1); PFOS, 3 ng l(-1)) or wastewater treatment effluent (PFOA, 24 ng l(-1); PFOS, 11 ng l(-1)), suggest that effective logK(oc) distribution coefficients for the field situation may be close to 3.7 for PFOA and 4.2 for PFOS. Applying lab-based logK(oc) distribution coefficients can therefore result in a serious overestimation of PFC concentrations in water and in turn to an underestimation of the residence time of PFOA and PFOS in contaminated soils. Irrespective of the dissipation kinetics, the majority of PFOA and PFOS from contaminated soils will be transported to groundwater and surface water bodies. (C) 2013 Elsevier Ltd. All rights reserved.
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