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Predicting sediment sorption coefficients for linear alkylbenzenesulfonate congeners from polyacrylate-water partition coefficients at different salinities.
Environ Sci Technol. 2010 Feb 01; 44(3):941-7.ES

Abstract

The effect of the molecular structure and the salinity on the sorption of the anionic surfactant linear alkylbenzenesulfonate (LAS) to marine sediment has been studied. The analysis of several individual LAS congeners in seawater and of one specific LAS congener at different dilutions of seawater was carried out after extraction by polyacrylate solid-phase microextraction (SPME) fibers. Sorption isotherms for the tested LAS congeners on marine sediment and at different ionic composition were all nonlinear with a constant Freundlich exponent (n(F)) of 0.78 +/- 0.05. Differences in LAS sorption of a number of congeners were similar to the differences among the linear partition coefficients (K(fw)) observed for the polyacrylate SPME fibers in seawater. The sorption of LAS to both the sediment and the SPME fiber significantly decreased in media with lower salinity. Dissolved calcium could fully account for the changed affinity of LAS for the SPME fiber, although the high sorption in seawater was also equaled by a corresponding dissolved concentration of NaCl only. Sediment sorption coefficients of a single LAS congener at varying ionic composition was not as strongly related to the K(fw) values as the relation observed for different LAS compounds in seawater, likely because sorption mechanisms are different in both phases. In the absence of experimental data for octanol-water coefficients (K(ow)) of (i) individual LAS congeners at (ii) different ionic compositions, the use of K(fw) as a tool to predict sorption and other hydrophobicity-related processes is suggested.

Authors+Show Affiliations

Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands. rico.angeles@inia.esNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20058863

Citation

Rico-Rico, Angeles, et al. "Predicting Sediment Sorption Coefficients for Linear Alkylbenzenesulfonate Congeners From Polyacrylate-water Partition Coefficients at Different Salinities." Environmental Science & Technology, vol. 44, no. 3, 2010, pp. 941-7.
Rico-Rico A, Droge ST, Hermens JL. Predicting sediment sorption coefficients for linear alkylbenzenesulfonate congeners from polyacrylate-water partition coefficients at different salinities. Environ Sci Technol. 2010;44(3):941-7.
Rico-Rico, A., Droge, S. T., & Hermens, J. L. (2010). Predicting sediment sorption coefficients for linear alkylbenzenesulfonate congeners from polyacrylate-water partition coefficients at different salinities. Environmental Science & Technology, 44(3), 941-7. https://doi.org/10.1021/es902453s
Rico-Rico A, Droge ST, Hermens JL. Predicting Sediment Sorption Coefficients for Linear Alkylbenzenesulfonate Congeners From Polyacrylate-water Partition Coefficients at Different Salinities. Environ Sci Technol. 2010 Feb 1;44(3):941-7. PubMed PMID: 20058863.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Predicting sediment sorption coefficients for linear alkylbenzenesulfonate congeners from polyacrylate-water partition coefficients at different salinities. AU - Rico-Rico,Angeles, AU - Droge,Steven T J, AU - Hermens,Joop L M, PY - 2010/1/12/entrez PY - 2010/1/12/pubmed PY - 2010/4/27/medline SP - 941 EP - 7 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 44 IS - 3 N2 - The effect of the molecular structure and the salinity on the sorption of the anionic surfactant linear alkylbenzenesulfonate (LAS) to marine sediment has been studied. The analysis of several individual LAS congeners in seawater and of one specific LAS congener at different dilutions of seawater was carried out after extraction by polyacrylate solid-phase microextraction (SPME) fibers. Sorption isotherms for the tested LAS congeners on marine sediment and at different ionic composition were all nonlinear with a constant Freundlich exponent (n(F)) of 0.78 +/- 0.05. Differences in LAS sorption of a number of congeners were similar to the differences among the linear partition coefficients (K(fw)) observed for the polyacrylate SPME fibers in seawater. The sorption of LAS to both the sediment and the SPME fiber significantly decreased in media with lower salinity. Dissolved calcium could fully account for the changed affinity of LAS for the SPME fiber, although the high sorption in seawater was also equaled by a corresponding dissolved concentration of NaCl only. Sediment sorption coefficients of a single LAS congener at varying ionic composition was not as strongly related to the K(fw) values as the relation observed for different LAS compounds in seawater, likely because sorption mechanisms are different in both phases. In the absence of experimental data for octanol-water coefficients (K(ow)) of (i) individual LAS congeners at (ii) different ionic compositions, the use of K(fw) as a tool to predict sorption and other hydrophobicity-related processes is suggested. SN - 0013-936X UR - https://www.unboundmedicine.com/medline/citation/20058863/Predicting_sediment_sorption_coefficients_for_linear_alkylbenzenesulfonate_congeners_from_polyacrylate_water_partition_coefficients_at_different_salinities_ L2 - https://dx.doi.org/10.1021/es902453s DB - PRIME DP - Unbound Medicine ER -