Sorption behaviour of perfluoroalkyl substances in soils

Milinović, Jelena; Lacorte, Sı́lvia; Vidal, Miquel; Rigol, Anna

doi:10.1016/j.scitotenv.2014.12.017

Cited by 246 publications

(162 citation statements)

References 35 publications

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“…They found that organic carbon rather than inorganic oxide content in sediment was the dominant effect parameter on sorption, indicating the importance of hydrophobic interactions. The similar results were also obtained in other previous studies (Ahrens et al 2009;Ahrens et al 2010;Zhao et al 2012;Zhao et al 2014;Milinovic et al 2015), where they reported that hydrophobic interaction predominated the sorption behavior of longer-chain PFASs that were found to adsorb more strongly onto sediment, soil or activated sludge while short-chain PFASs were exclusively in water. In addition, previous work had also demonstrated that sorption of PFASs on sediment, soil or sludge increased with increasing solution Ca 2+ concentration and decreasing pH value, in particular, the sorption behaviors of PFOS was expected to be strongly affected by solution conditions (Higgins 2006;Zhao et al 2014;Milinovic et al 2015).…”

Section: Introductionsupporting

confidence: 90%

Partition behavior of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in riverine sediments

Liu¹,

Tian²,

Gong³

et al. 2017

dwt

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a b s t r ac tThe sorption of perfluoroalkyl substances on the sediments is an important process which determines to their fate, distribution and transport in water system. In this study, the sorption kinetics, thermodynamics and effect parameters on partition behavior of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) at low initial concentration (50 ng/L) were investigated. The results showed that the equilibrium was achieved within 48 h. The sorption isotherms of PFOS and PFOA could be described by Freundlich equation. The surface area and composition of sediment particles as well as solution pH values and ion strength strongly influenced the sorption of PFOA and PFOS. Both PFOA and PFOS exhibited higher sorption capacity on the sediments with high organic matter content. These results indicated that multiple driving forces such as hydrophobic exclusion, specific chemical interaction and electrostatic attraction contributed to the nonlinear sorption of PFOA and PFOS on sediments.

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Section: Introductionsupporting

confidence: 90%

Partition behavior of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in riverine sediments

Liu¹,

Tian²,

Gong³

et al. 2017

dwt

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show abstract

“…There are linearly positive relationships among the concentrations of PFBS, PFHxS and PFOS (p < 0.05), which implies that they might share similar source and transport routes. Considering the sorption potential of PFASs increases with hydrophobicity (Milinovic et al, 2015), the proportion of PFASs with lower hydrophobicity such as PFBS and PFHxS in the possible sources were probably even higher.…”

Section: Pfas Composition Profile and Source Identificationmentioning

confidence: 99%

Spatial distribution and fate of perfluoroalkyl substances in sediments from the Pearl River Estuary, South China

Gao

Meng

et al. 2015

Marine Pollution Bulletin

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a b s t r a c tIn this study, 54 sediment samples were collected from the Pearl River Estuary (PRE) in Southern China to study the spatial distribution and patterns of PFASs in this region. PFAS concentrations in the sediment samples ranged from nd (below detection limit) to 2.41 ng g À1 dw (dry weight) with an average value of 0.79 ng g À1 dw. PFAS concentrations were higher at the nearshore sampling sites than in the others.Perfluorobutanesulfonate (PFBS) and perfluorohexanesulfonate (PFHxS) were the two dominant compounds among the target PFASs, which may be due to their production and use as PFOS substitutes in the Pearl River Delta (PRD) areas. Significant linear relationships were found between total PFAS concentrations and total organic carbon (TOC) (R = 0.30, p < 0.05). The preliminary environmental risk assessment indicated that PFOS and PFOA in the regional sediments posed no significant ecological risk to the benthic organisms at present levels.

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“…3,10,11,12 PFOA has also shown to bind strongly with soil. 13,14,15 Halogenated phenols like PFP have been detected in environmental systems because of their use as wood preservatives, pesticides, and herbicides. 16 Perfluoronated contaminants are studied here due to their increasing environmental importance and distribution.…”

Section: Introductionmentioning

confidence: 99%

From Spill to Sequestration: The Molecular Journey of Contamination via Comprehensive Multiphase NMR

Masoom

Courtier‐Murias

Soong

et al. 2015

Environ. Sci. Technol.

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Comprehensive multiphase NMR is a novel NMR technique that permits all components (solutions, gels, and solids) to be studied in unaltered natural samples. In this study a wide range of CMP-NMR interaction and editing-based experiments are combined to follow contaminants (pentafluorophenol (PFP) and perfluorooctanoic acid (PFOA)) from the solution state (after a spill) through the gel-state and finally into the true solid-state (sequestered) in an intact water-swollen soil. Kinetics experiments monitoring each phase illustrate PFOA rapidly transfers from solution to the solid phase while for PFP the process is slower with longer residence times in the solution and gel phase. Interaction-based experiments reveal that PFOA enters the soil via its hydrophobic tails and selectively binds to soil microbial protein. PFP sorption shows less specificity exhibiting interactions with a range of gel and solid soil components with a preference toward aromatics (mainly lignin). The results indicate that in addition to more traditional measurements such as Koc, other factors including the influence of the contaminant on the soil-water interface, specific biological interactions, soil composition (content of lignin, protein, etc.) and physical accessibility/swellability of soil organic components will likely be central to better explaining and predicting the true behavior of contaminants in soil.

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Sorption behaviour of perfluoroalkyl substances in soils

Cited by 246 publications

References 35 publications

Partition behavior of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in riverine sediments

Partition behavior of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in riverine sediments

Spatial distribution and fate of perfluoroalkyl substances in sediments from the Pearl River Estuary, South China

From Spill to Sequestration: The Molecular Journey of Contamination via Comprehensive Multiphase NMR

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