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Chemosphere v.172, 2017년, pp.1 - 9   SCI SCIE SCOPUS
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Correlation between degradation pathway and toxicity of acetaminophen and its by-products by using the electro-Fenton process in aqueous media

Le, Thi Xuan Huong (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université ); Nguyen, Thi Van (de Montpellier, Place E. Bataillon, F-34095, Montpellier, France ); Amadou Yacouba, Zoulkifli (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université ); Zoungrana, Laetitia (de Montpellier, Place E. Bataillon, F-34095, Montpellier, France ); Avril, Florent (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université ); Nguyen, Duy Linh (de Montpellier, Place E. Bataillon, F-34095, Montpellier, France ); Petit, Eddy (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université ); Mendret, Julie (de Montpellier, Place E. Bataillon, F-34095, Montpellier, France ); Bonniol, Valerie (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université ); Bechelany, Mikhael (de Montpellier, Place E. Bataillon, F-34095, Montpellier, France ); Lacour, Stella (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université ); Lesage, Geoffroy (de Montpellier, Place E. Bataillon, F-34095, Montpellier, France ); Cretin, Marc (IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Université );
  • 초록  

    Abstract The evolution of the degradation by-products of an acetaminophen (ACE) solution was monitored by HPLC-UV/MS and IC in parallel with its ecotoxicity ( Vibrio fischeri 81.9%, Microtox ? screening tests) during electro-Fenton (EF) oxidation performed on carbon felt. The aromatic compounds 2-hydroxy-4-(N-acetyl) aminophenol, 1,4-benzoquinone, benzaldehyde and benzoic acid were identified as toxic sub-products during the first stage of the electrochemical treatment, whereas aliphatic short-chain carboxylic acids (oxalic, maleic, oxamic, formic, acetic and fumaric acids) and inorganic ions (ammonium and nitrate) were well identified as non-toxic terminal sub-products. Electrogenerated hydroxyl radicals then converted the eco-toxic and bio-refractory property of initial ACE molecule (500 mL, 1 mM) and subsequent aromatic sub-products into non-toxic compounds after 2 h of EF treatment. The toxicity of every intermediate produced during the mineralization of ACE was quantified, and a relationship was established between the degradation pathway of ACE and the global toxicity evolution of the solution. After 8 h of treatment, a total organic carbon removal of 86.9% could be reached for 0.1 mM ACE at applied current of 500 mA with 0.2 mM of Fe 2+ used as catalyst. Highlights Coupling ecotoxicity monitoring and chemical analysis during the electro-Fenton process. Quantifying the toxicity of every intermediate during the mineralization of ACE. Establishing relationship between degradation pathway and global toxicity of the solution.


  • 주제어

    Carbon felt .   Advanced oxidation process .   TOC .   Mineralization .   By-products .   Toxicity.  

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