Comparison of four oxidants activated through tetraacetylethylenediamine for developing sustainable and rapid degradation of organic dye / Yongchun Dong in COLORATION TECHNOLOGY, Vol. 136, N° 4 (08/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 4 (08/2020) . - p. 389-403 Titre : Comparison of four oxidants activated through tetraacetylethylenediamine for developing sustainable and rapid degradation of organic dye Type de document : texte imprimé Auteurs : Yongchun Dong, Auteur ; Liran Bien, Auteur ; Congcan Zhang, Auteur ; Bing Li, Auteur Année de publication : 2020 Article en page(s) : p. 389-403 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Détérioration Colorants azoïques Oxydants Phytotoxicité Tests de toxicité Tétra-acétyl-éthylène-diamine Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four common oxidants, including hydrogen peroxide (H2O2), sodium percarbonate (SPC), sodium perborate (SPB) and sodium persulphate (SPS), were activated with tetraacetylethylenediamine (TAED) to degrade an azo dye, CI Reactive Red 195, in water, for building a novel and rapid oxidative system comprising the merits of cost‐effectiveness and high sustainability. Elevated temperature and high pH level enhanced the activation effect of TAED for accelerating dye degradation. Peracetic acids were confirmed to be the main oxidative species for dye degradation in four TAED/oxidant systems. Hydroxyl radicals and sulphate radicals were also involved in dye degradation in the TAED/SPS system, which showed a stronger oxidative capacity than the other three systems over a wide pH range. More importantly, the addition of inorganic salts or surfactants also favoured the dye degradation in TAED/oxidant systems. Although a slow mineralisation process of the dye was found when the TAED/SPC or SPS system was used, low‐toxic intermediates were detected after the degradation. Note de contenu : - EXPERIMENTAL : Reagents and materials - Experimental procedures - Analytical methods - Phytotoxicity tests - RESULTS AND DISCUSSION : Optimisation of CI reactive red 195 degradation in TAED/oxidant systems - Contribution of active species to dye degradation - Possible degradation pathway of CI reactive red 195 in TAED/oxidant systems - Effect of inorganic salts and surfactants - Phytotoxicity assessment of dye decomposition products DOI : https://doi.org/10.1111/cote.12474 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12474 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34355 [article]

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