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2016-01-16

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/108082

Sorption of perfluoroalkyl substances in sewage sludge

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https://doi.org/10.1007/s11356-015-6019-9

Resum

The sorption behaviour of three perfluoroalkyl substances (PFASs) (perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and perfluorobutanesulfonic acid (PFBS)) was studied in sewage sludge samples. Sorption isotherms were obtained by varying initial concentrations of PFOS, PFOA and PFBS. The maximum values of the sorption solid-liquid distribution coefficients (Kd,max) varied by almost two orders of magnitude among the target PFASs: 140-281 mL g−1 for PFOS, 30-54 mL g−1 for PFOA and 9-18 mL g−1 for PFBS. Freundlich and linear fittings were appropriate for describing the sorption behaviour of PFASs in the sludge samples, and the derived KF and Kd,linear parameters correlated well. The hydrophobicity of the PFASs was the key parameter that influenced their sorption in sewage sludge. Sorption parameters and log(KOW) were correlated, and for PFOS (the most hydrophobic compound), pH and Ca + Mg status of the sludge controlled the variation in the sorption parameter values. Sorption reversibility was also tested from desorption isotherms, which were also linear. Desorption parameters were systematically higher than the corresponding sorption parameters (up to sixfold higher), thus indicating a significant degree of irreversible sorption, which decreased in the sequence PFOS > PFOA > PFBS

Matèries

Llots de depuradora, Absorció, Contaminants persistents

Matèries (anglès)

Sewage sludge, Absorption, Persistent pollutants

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Articles publicats en revistes (Enginyeria Química i Química Analítica)

Citació

MILINOVIC, Jelena, LACORTE I BRUGUERA, Sílvia, RIGOL PARERA, Anna, VIDAL ESPINAR, Miquel. Sorption of perfluoroalkyl substances in sewage sludge. _Environmental Science and Pollution Research_. 2016. Vol. 23, núm. 9, pàgs. 8339-8348. [consulta: 21 de gener de 2026]. ISSN: 0944-1344. [Disponible a: https://hdl.handle.net/2445/108082]

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