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Theses

Spéciation de composés organohalogénés constitutifs des AOX issus de la monochloramination des eaux brutes de rivières

Abstract : Over the last years, various studies have been carried out to identify and quantify the organohalogen by-products (OXBPs) resulting from the treatment of river waters with monochloramine. A particular effort was made to monitor the regulated and/or known organohalogen by-products with the analytical parameter AOX (Adsorbable Organic Halides). This parameter estimate the quantity of organohalogen by-products generated.A recent inventory shows that despite the large number of these compounds on "real" water samples, the percentage of these identified by-products attributable to monochloramine treatment remains very low.The thesis project is a continuation of previous studies carried out by EDF R&D on the speciation of OXBPs constituents of AOX, according to an interconnected analytical approach. This latter allowed the reduction of uncertainties related to how the material balance was established : (1) setting up efficient extraction and enrichment protocols for OXBPs on solid phase, (2) the development of sensitive analytical methods for monitoring simultaneously several known OXBPs, (3) improving the reliability of the AOX measurement method by improving its sample preparation step and developing a method of analyzing Analysis in order to establish the rate of incorporation of the various halides (Cl, Br, I) in AOX, and (4) non-targeted screening tests by GC-MS and LC-MS, as well as analysis in high resolution by FT-ICR/MS for the identification of OXBPs with high molecular weight.This approach was applied to real water samples and increased sensitivity to current methods, as well as the identification of new OXBPs not listed in previous EDF R&D studies.
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Aziz Kinani. Spéciation de composés organohalogénés constitutifs des AOX issus de la monochloramination des eaux brutes de rivières. Chimie analytique. Université Paris Saclay (COmUE), 2017. Français. ⟨NNT : 2017SACLX077⟩. ⟨tel-03550292⟩

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