Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1021/es062608z
Title (Primary) Nonlinear sorption of three alcohol ethoxylates to marine sediment: a combined langmuir and linear sorption process?
Author Droge, S.T.J.; Hermens, J.L.M.
Source Titel Environmental Science & Technology
Year 2007
Department AUC
Volume 41
Issue 9
Page From 3192
Page To 3198
Language englisch
Abstract Alcohol ethoxylates (AE) are nonionic surfactants mainly used in laundry cleaning products. The relation between particle bound and freely dissolved concentrations is an important entity in risk assessment. The mechanistic understanding of AE sorption is still poor, hampering extrapolations from laboratory studies to the field. We studied the sorption of three AE with 8 EO units but with increasing alkyl chains (C-10, C-12, and C-14) to a marine sediment. Solid-phase microextraction, using polyacrylate as the extraction phase, was applied to measure freely dissolved concentrations in pore water. A model that combines a Langmuir and a linear sorption term fitted the nonlinear sorption data to sediment well. At low aqueous concentrations, adsorption dominates over absorption leading to higher distribution coefficients for AE at low field concentrations. This dual-mode model offers the possibility to extrapolate to other AE homologues and other marine sediments and also from high to low field concentrations
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=1736
Droge, S.T.J., Hermens, J.L.M. (2007):
Nonlinear sorption of three alcohol ethoxylates to marine sediment: a combined langmuir and linear sorption process?
Environ. Sci. Technol. 41 (9), 3192 - 3198 10.1021/es062608z