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Binding of per- and polyfluoroalkyl substances (PFASs) by organic soil materials with different structural composition - Charge- and concentration-dependent sorption behavior

De Campos Pereira, Hugo and Makselon, Jennifer and Berggren Kleja, Dan and Prater, Isabel and Kogel-Knabner, Ingrid and Ahrens, Lutz and Gustafsson, Jon Petter (2022). Binding of per- and polyfluoroalkyl substances (PFASs) by organic soil materials with different structural composition - Charge- and concentration-dependent sorption behavior. Chemosphere. 297 , 134167
[Research article]

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Abstract

The charge-and concentration-dependent sorption behavior of a range of per-and polyfluoroalkyl substances (PFASs) was studied for three organic soil samples with different organic matter quality, one Spodosol Oe horizon (Mor Oe) and two Sphagnum peats with different degrees of decomposition (Peat Oi and Peat Oe). Sorption to the two peat materials was, on average, four times stronger compared to that onto the Mor Oe material. In particular, longer-chained PFASs were more strongly bound by the two peats as compared to the Mor Oe sample. The combined results of batch sorption experiments and 13C NMR spectroscopy suggested sorption to be positively related to the content of carbohydrates (i.e., O-alkyl carbon). Sorption of all PFAS subclasses was inversely related to the pH value in all soils, with the largest pH effects being observed for perfluoroalkyl carboxylates (PFCAs) with C-10 and C-11 perfluorocarbon chain lengths. Experimentally determined sorption isotherms onto the poorly humified Peat Oi did not deviate significantly from linearity for most substances, while for the Mor Oe horizon, sorption nonlinearity was generally more pronounced. This work should prove useful in assessing PFAS sorption and leaching in organic soil horizons within environmental risk assessment.

Authors/Creators:De Campos Pereira, Hugo and Makselon, Jennifer and Berggren Kleja, Dan and Prater, Isabel and Kogel-Knabner, Ingrid and Ahrens, Lutz and Gustafsson, Jon Petter
Title:Binding of per- and polyfluoroalkyl substances (PFASs) by organic soil materials with different structural composition - Charge- and concentration-dependent sorption behavior
Series Name/Journal:Chemosphere
Year of publishing :2022
Volume:297
Article number:134167
Number of Pages:9
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0045-6535
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:PFAS, Mor, Peat, Spodosol, Sphagnum, C-13 NMR
URN:NBN:urn:nbn:se:slu:epsilon-p-116891
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116891
Additional ID:
Type of IDID
DOI10.1016/j.chemosphere.2022.134167
Web of Science (WoS)000784286300001
ID Code:27704
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:05 May 2022 11:25
Metadata Last Modified:05 May 2022 11:31

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