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Electrochemical abatement of analgesic antipyretic 4‐aminophenazone using conductive boron‐doped diamond and sub‐stoichiometric titanium oxide anodes: kinetics, mineralization and toxicity assessment

Ganiyu, Soliu O. and Oturan, Nihal and Trellu, Clément and Raffy, Stéphane and Cretin, Marc and Causserand, Christel and Oturan, Mehmet A. Electrochemical abatement of analgesic antipyretic 4‐aminophenazone using conductive boron‐doped diamond and sub‐stoichiometric titanium oxide anodes: kinetics, mineralization and toxicity assessment. (2018) ChemElectroChem, 6 (6). 1808-1817. ISSN 2196-0216

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Official URL: https://doi.org/10.1002/CELC.201801741

Abstract

The oxidation ability of two prominent eco‐friendly electrochemical advanced oxidation processes (EAOPs), namely anodic oxidation with H2O2 generation (AO‐H2O2) and electro‐Fenton (EF) for complete abatement of acidic solution of 4‐aminophenazone (4‐APZ) has been investigated using conductive boron‐doped diamond (BDD) and sub‐stoichiometric titanium oxide (Ti4O7) anodes and carbon‐felt cathode. The higher performance of EF compared to AO‐H2O2 with either anode was demonstrated. In all trials, 4‐APZ was completely destroyed, following pseudo first‐order kinetics with the rate constant values increasing with applied current and higher values attained with BDD compared to Ti4O7 anode at similar conditions. The absolute rate constant for the reaction between 4‐APZ and hydroxyl radicals was found to be 3.9±0.2×109 L mol−1 s−1. Complete mineralization could be attained with BDD anode, whereas Ti4O7 anode only showed excellent mineralization up to 94 % TOC removal. Therefore, Ti4O7 anode can constitutes a promising anode material thanks to its lower manufacturing cost. Inorganic ions like NO3− and HCO3− at concentration up to 25 mM has no effect on mineralization efficiency during AO‐H2O2, but the presence of Cl− even at lower concentration of 10 mM significantly reduced the TOC removal efficiency. The toxicity of the solution sharply increased at initial stage of treatment, corresponding to the formation of cyclic by‐products but their conversion to carboxylic acids due to longer treatment time involved a sharp toxicity decrease, thus ensuring overall detoxification.

Item Type:Article
HAL Id:hal-02134710
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Saint-Gobain (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université Paris-Est Marne-La-Vallée - UPEM (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Laboratory name:
Funders:
French National Research Agency - ANR (FRANCE)
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Deposited By: Christel CAUSSERAND
Deposited On:02 May 2019 11:56

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