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Adsorption des perturbateurs endocriniens lors de la potabilisation : Développement d'une méthodologie d'obtention des paramètres d'équilibre et cinétiques

Abstract : Endocrine disrupting compounds are micropollutants that have shown estrogenic activity at environmentally relevant concentration levels, from µg. L-1 to ng. L-1. Activated carbon adsorption is specifically designed to remove organic pollution. The assessment of the process efficiency in real conditions (low concentration level, simultaneous adsorption of organic matter) requires stringent and costly experimentations, in particular due to the analysis. An analytical method involving SPE-UPLC-MS/MS was optimized and validated. Experimental data has been analysed and processed using an advanced statistical treatment in order to assess the influence of the heteroskedasticity of the signal’s variance on the precision of the results. A methodology was developed for the determination of the adsorption capabilities based on high concentration adsorption experiments and downward extrapolation of the adsorption performance at low concentration level using modelling. Bisphenol A and ethynylestradiol, and two powdered activated carbons were used for experiments at high concentration level and, for validation purpose, at low concentration level. Several models have been tested in order to determine their extrapolation capabilities. Results have shown that the IAST model, for competitive adsorption, and the HSDM theory, for kinetics, fitted at high concentration level are capable of downward extrapolation of adsorption equilibriums and kinetics of both target compounds at low concentration level.
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https://hal-univ-rennes1.archives-ouvertes.fr/tel-02915048
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Submitted on : Thursday, August 13, 2020 - 2:24:49 PM
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Azziz Assoumani. Adsorption des perturbateurs endocriniens lors de la potabilisation : Développement d'une méthodologie d'obtention des paramètres d'équilibre et cinétiques. Chimie analytique. Université de Rennes 1, 2009. Français. ⟨tel-02915048⟩

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