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Determination, aerobic biodegradation and environmental occurrence of aliphatic alcohol polyethoxylate sulfates (AES)

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A new analytical method was developed for the routine specific determination of the anionic surfactant Alcohol polyEthoxylate Sulfate (AES) in environmental aqueous samples. An enrichment/fractionation of the target analytes in water samples was performed by solid-phase extraction (SPE) on graphitized carbon black (GCB) (recoveries: 90-103%), followed by hydrolysis/derivatization with fluorescent reagents and separation/detection by reversed-phase high performance liquid chromatography coupled with fluorescence (HPLC-FLD). The developed procedure was applied to the study of the aerobic biodegradation of AES under laboratory conditions and to a ten-month monitoring of AES, as well as of linear alkylbenzene sulfonates (LAS), nonylphenol polyethoxylates (NPE) and alcohol polyethoxylates (AE) surfactants, in the Po river (Northern Italy). The residual concentrations found in the river waters were compared and used for a preliminary estimation of the annual average loads of monitored surfactants in the Adriatic Sea.
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Keywords: AES, Surfactants; Alcohol polyethoxylate sulfates; Environmental behavior; HPLC-FLD

Document Type: Research Article

Affiliations: 1: Department of Environmental Sciences - University of Venice Calle Larga S. Marta 2137 Venice Italy 2: Sasol Italy S.p.A. - Research & Technology Center V. Reali 4-20037 Paderno Dugnano (MI) Italy

Publication date: August 1, 2004

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