title: Long-term lysimeter experiment to investigate the leaching of perfluoroalkyl substances (PFASs) and the carry-over from soil to plants: results of a pilot study.
abstract: To study the behavior of perfluoroalkyl substances (PFASs) in soil and the carry-over from soil to plants, technical mixtures of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) at a concentration of 25 mg/kg soil were applied to 1.5 m(3) monolithic soil columns of a lysimeter. Growth samples and percolated water were analyzed for PFASs throughout a period of 5 years. In addition to PFOA/PFOS plant compartments and leachate were found to be contaminated with short-chain PFASs. Calculation showed significant decreasing trends (p < 0.05) for all substances tested in the growth samples. Short-chain PFASs and PFOA pass through the soil much more quickly than PFOS. Of the 360 g of PFOA and 367.5 g of PFOS applied to the soil, 96.88% PFOA and 99.98% PFOS were still present in the soil plot of the lysimeter after a period of 5 years. Plants accumulated 0.001% PFOA and 0.004% PFOS. Loss from the soil plot through leachate amounted to 3.12% for PFOA and 0.013% for PFOS.
authors: Hessian State Laboratory, Wiesbaden, Germany. thorsten.stahl@lhl.hessen.de
authors: Thorsten
authors: T
authors: Stahl
authors: Rika Alessa
authors: RA
authors: Riebe
authors: Sandy
authors: S
authors: Falk
authors: Klaus
authors: K
authors: Failing
authors: Hubertus
authors: H
authors: Brunn
mesh_terms: D017738:Alkanesulfonic Acids / Q000737:chemistry* / Q000494:pharmacology; D002210:Caprylates / Q000737:chemistry* / Q000494:pharmacology; D004785:Environmental Pollutants / Q000737:chemistry* / Q000494:pharmacology; D005466:Fluorocarbons / Q000737:chemistry* / Q000494:pharmacology; D007700:Kinetics; D010865:Pilot Projects; D010944:Plants / Q000737:chemistry* / Q000187:drug effects; D012987:Soil / Q000737:chemistry*
chemical_list: D017738:Alkanesulfonic Acids; D002210:Caprylates; D004785:Environmental Pollutants; D005466:Fluorocarbons; D012987:Soil; C023036:perfluorooctanoic acid; C076994:perfluorooctane sulfonic acid