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

Campos-Pereira Hugo; Makselon Jennifer; Kleja Dan B.Prater IsabelKogel-Knabner IngridAhrens LutzGustafsson Jon Petter

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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

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

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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.

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《Chemosphere》 |2022年第6期|134167.1-134167.9|共9页
作者
Campos-Pereira Hugo; Makselon Jennifer; Kleja Dan B.Prater IsabelKogel-Knabner IngridAhrens LutzGustafsson Jon Petter;
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作者单位

Swedish Univ Agr Sci SLU, Dept Soil & Environm, Box 7014, SE-75007 Uppsala, Sweden;

Swedish Univ Agr Sci SLU, Dept Soil & Environm, Box 7014, SE-75007 Uppsala, Sweden|Swedish Geotech Inst SGI, SE-58193 Linkoping, Sweden;

Tech Univ Munich, Res Dept Ecol & Ecosyst Management, Soil Sci, D-85354 Freising Weihenstephan, GermanySwedish Univ Agr Sci SLU, Dept Aquat Sci & Assessment, Box 7050, SE-75007 Uppsala, Sweden;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
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关键词
PFAS; Mor; Peat; Spodosol; Sphagnum; C-13 NMR;

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

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