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27 results on '"Karpel Vel Leitner, Nathalie"'

16. MISE EN OEUVRE DE L'ANALYSE NON CIBLEE COMME OUTIL DE CARACTERISATION DES EAUX

Author

Motteau, Solène, Deborde, Marie, Gombert, Bertrand, Karpel Vel Leitner, Nathalie, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Karpel, Nathalie

Subjects
[CHIM.ANAL] Chemical Sciences/Analytical chemistry, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, eaux de rivières, eaux usées, ComputingMilieux_MISCELLANEOUS, micropolluants organiques
Abstract

International audience

Published
2020

17. Inorganic and organic byproducts of the reactions between chlorite, activated carbon, and phenolic compounds

Author

Karpel Vel Leitner, Nathalie, De Laat, Joseph, Dore, Marcel, Suty, Herve, and Pouillot, Michel

Subjects
Chlorites -- Research, Water -- Purification, Drinking water -- Research, Carbon, Activated -- Research, Phenols -- Research, Environmental issues, Science and technology
Abstract

The effect of phenol and p-nitrophenol on the removal of chlorite from aqueous soluiton by granular activated carbon (GAC) was investigated to determine the effect of phenolic compounds on the efficiency of GAC, which may be used for purifying drinking water of chlorite. Chlorite is a product of the reaction of inorganic and organic compounds with chlorine dioxide, which is used for chemical preoxidation and final disinfection of drinking water. Results showed that phenolic compounds decreased the capacity of GAC to remove chlorite.

Published
1994

18. Oxidation of Cyanuric Acid in Aqueous Solution by Catalytic Ozonation

Author

Abdelli, Ghizlane, Leitner, Nathalie Karpel Vel, Alkhuraiji, Turki, Karpel Vel Leitner, Nathalie, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), and Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC)

Subjects
Environmental Engineering, Ozone, Aqueous solution, 040301 veterinary sciences, Inorganic chemistry, 04 agricultural and veterinary sciences, 010402 general chemistry, 01 natural sciences, Mineralization (biology), 0104 chemical sciences, Catalysis, 0403 veterinary science, chemistry.chemical_compound, chemistry, Nitrate, [CHIM]Chemical Sciences, Environmental Chemistry, Ammonium, Nitrite, Cyanuric acid, ComputingMilieux_MISCELLANEOUS
Abstract

The aim of this work was studying the activity of a Ru/CeO2 powder catalyst in the ozonation of aqueous solution of cyanuric acid (CYA). Ozonation in the presence of the catalyst significantly enhances CYA degradation. Within this work, investigation of the influence of pH and initial concentration on the catalytic ozonation of CYA has been done in a semicontinuous reactor. The removing degree of CYA at pH 5.9 show better response in comparison to pH 2.5 and pH 8.2. The mineralization of CYA by catalytic ozonation formed nitrate ions (0.7 mol of NO3−/mol of CYA removed for 50% initial CYA abatement) and nitrite and ammonium ions in small amounts. Three transformation products formed during catalytic ozonation were identified from LC/MS and MS/MS analyses. The impact of oxidation on the toxicity was measured from the inhibition of Vibrio fisheri, which was found to increase continuously.

Published
2015
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