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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Investigation of a homogeneous activating ozonation method in the rinsing procedure of cotton fabric dyed with reactive dye / Ya-Hong Mao in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 4 (2011) Titre : Investigation of a homogeneous activating ozonation method in the rinsing procedure of cotton fabric dyed with reactive dye Type de document : texte imprimé Auteurs : Ya-Hong Mao, Auteur ; Yu Guan, Auteur ; Deng-Hong Luo, Auteur ; Qing-Kang Zheng, Auteur ; Xi-Ning Feng, Auteur ; Xiu-Xing Wang, Auteur Année de publication : 2011 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Oxydation Colorants réactifs Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Eaux usées -- Epuration Rinçage Teinture -- Fibres textiles Tétra-acétyl-éthylène-diamine Textiles et tissus Index. décimale : 667.3 Teinture et impression des tissus Résumé : The textile dyeing process requires the consumption of large quantities of water, which includes huge amounts of coloured wastewater. Usually the rinsing of dyed fabric and the treating of the dyeing house wastewater are separated. The two independent processes not only increase the difficulty of wastewater treatment but also increase the costs of the treatment. In this paper, the ozone/tetraacetylethylenediamine active oxidation technology was employed to rinse dyed fabric and to decolorise the rinsing wastewater simultaneously. The effects of the rinsing conditions on the decolorisation ratio and the chemical oxygen demand Cr value of treated wastewater, and the K/S value, colour difference, tensile strength and fastness of dyed samples were investigated. The results indicated that the decolorisation ratio of the rinsing effluent was greater than 80% and the chemical oxygen demand Cr value decreased more than 58% by the ozone/tetraacetylethylenediamine rinsing process compared with that of traditional rinsing processes. Furthermore, the curve of decolorisation kinetics was in good agreement with a pseudo-first-order kinetic model. In addition, the decolorisation mechanism was also discussed after ultraviolet–visible and ultra performance liquid chromatograph–mass spectrometry analyses of the degraded dye molecule. Note de contenu : EXPERIMENTAL : Materials - Ozonation decolorisation experiment - Dyeing procedure - Rinsing process - Measurements of the output quantity and the utilisation of ozone - Measurements of rinsing effluent - Analysis of the decolorisation kinetics - Tests of dyed fabrics - Measurement of liquid and air surface tension - Analysis of degradation products. RESULTS AND DISCUSSION : Effect of rinsing conditions on the decolorisation ratio of rinsing effluent - Environmental effect of ozone/TAED rinsing effluent - Ozonation decolorisation reaction kinetics - Effect of ozone/TAED rinsing on the dyed fabric - Destruction of the dye molecule during the ozone/TAED rinsing process. DOI : 10.1111/j.1478-4408.2011.00309.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11906 [article]

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