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In situ active chlorine generation for the treatment of dye-containing effluents.

Zaviska, François; Drogui, Patrick; Blais, Jean-François; Mercier, Guy (2009). In situ active chlorine generation for the treatment of dye-containing effluents. Journal of Applied Electrochemistry , vol. 39 , nº 12. p. 2397-2408. DOI: 10.1007/s10800-009-9927-x.

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Résumé

This study examined the possibility to remove colour causing-compounds from synthetic effluent by indirect electrochemical oxidation using iridium oxide anode electrodes. Using a high concentration of chloride ions (17.1 mM) and various current densities, it was possible to produce high concentration of active chlorine with a specific production rate of 2.8 mg min−1 A−1. The best performance for acid methyl violet 2B dye (MV2B) decomposition was obtained using Ti/IrO2 anodes operated at a current density of 15 mA cm−2 during 40 min of treatment in the presence of 3.42 mM of chloride ions. Under these conditions, more than 99% of MV2B was removed (with a reaction rate apparent constant of 0.20 min−1), whereas COD and TOC removal were 51% and 75%, respectively. The electrolytic cell was then used for the degradation of three other synthetic dye solutions: Eosin yellowish (EOY), Trypan Blue (TRB), Acridine Orange (ACO). TRB was the most difficult dye to remove from solution with a value reaction rate constant of 0.12 min−1, compared to 0.19 min−1 and 0.24 min−1 recorded for ACO and EOY dyes, respectively. More than 99% of these dyes were removed by electrochemical oxidation.

Type de document: Article
Mots-clés libres: active chlorine; indirect electrochemical oxidation; Ti/IrO2 anode; dye, colour removal
Centre: Centre Eau Terre Environnement
Date de dépôt: 11 janv. 2021 17:02
Dernière modification: 11 janv. 2021 17:02
URI: http://espace.inrs.ca/id/eprint/10740

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