Adsorption and fixation behaviour of CI Reactive Red 195 on cotton woven fabric in a nonionic surfactant Triton X-100 reverse micelle / Shixiong Yi in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 4 (2012) . - p. 306-314 Titre : Adsorption and fixation behaviour of CI Reactive Red 195 on cotton woven fabric in a nonionic surfactant Triton X-100 reverse micelle Type de document : texte imprimé Auteurs : Shixiong Yi, Auteur ; Yongchun Dong, Auteur ; Bing Li, Auteur ; Ding Zhizhong, Auteur ; Xiangbo Huang, Auteur ; Lexing Xue, Auteur Année de publication : 2012 Article en page(s) : p. 306-314 Note générale : Errata (voir URL) - Bibliogr. Langues : Anglais (eng) Catégories : Adsorption 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). Diffusion (physique) Eau -- Consommation -- Réduction Fixation (chimie) Micelles Surfactants Teinture -- Fibres textiles Tissés Index. décimale : 667.3 Teinture et impression des tissus Résumé : To achieve the goals of saving water and being salt-free in the coloration of cotton fabric with reactive dye, nonionic reverse micelles were prepared and optimised with a surfactant, Triton X-100, n-octanol and isooctane by injecting a small amount of CI Reactive Red 195 aqueous solution. The adsorption, diffusion and fixation of this dye on cotton fabric in Triton X-100 reverse micelle and bulk water were then investigated. The equilibrium and kinetic data of the dye adsorption process were evaluated. The colour strength and fixation rate of cotton fabrics dyed in the micelle and in bulk water were also examined and compared. The results indicated that the amount of dye adsorbed increased with the increasing temperature and the initial dye concentration. The dye adsorption process could be described using the Langmuir isotherm and pseudo-second-order kinetic equations. It was found that CI Reactive Red 195 showed a stronger adsorption property on cotton fabric in Triton X-100 reverse micelle than in bulk water without the addition of sodium chloride. Using Triton X-100 reverse micelle as the dyeing medium offered the reactive dye better diffusion performance within the cotton fibre as compared with bulk water. Moreover, higher fixation of the dyes absorbed on the cotton fibre was achieved when the optimum concentration of sodium carbonate was used as the alkali agent in Triton X-100 reverse micelle. Note de contenu : - EXPERIMENTAL : Materials and reagents - Preparation ot TX-100 reverse micelle - Adsorption and fixation of reactive dye on cotton fabric - RESULTS AND DISCUSSION : Optimisation of TX-100 reverse micelle - Adsorption of reactive dye on cotton fabric - Dye adsorption isotherm studies - Dye absorption kinetics - Dye diffusion within cotton fibre - Dye fixation on cotton fibre DOI : 10.1111/j.1478-4408.2012.00381.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00381.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15680 [article]

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Comparative study of four different flavonoid compounds-containing plant extracts functionalised waste wool for accelerating aqueous chromium(VI) reductive removal / Jiayu Gu in COLORATION TECHNOLOGY, Vol. 138, N° 1 (02/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 1 (02/2022) . - p. 97-113 Titre : Comparative study of four different flavonoid compounds-containing plant extracts functionalised waste wool for accelerating aqueous chromium(VI) reductive removal Type de document : texte imprimé Auteurs : Jiayu Gu, Auteur ; Yongchun Dong, Auteur ; Jiaxuan Zhang, Auteur Année de publication : 2022 Article en page(s) : p. 97-113 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Caractérisation Chrome hexavalent Déchets industriels -- Elimination Evaluation Extraits de plantes Flavonoïdes Laine -- Déchets Réduction (chimie) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four different plant material extracts containing flavonoid compounds were prepared with fruits of Lycium ruthenicum Murray (LRM) and Vaccinium spp. (VS), Ginkgo biloba L. (GBL) leaves and grape seeds. On the basis of several characterisation, these extracts were then used for functionalising waste wool fibres by an exhaustion dyeing process. Content of deposited flavonoid compounds and aqueous chromium(VI) reductive removal capacity of four plant material extract dyed wool fibres were investigated and compared. The results indicated that LRM and VS extracts contained more flavonoid compounds (0.12-0.15 mg ml−1) than the other two extracts (0.06-0.08 mg ml−1), which led to high content of deposited flavonoid compounds and strong chromium(VI) reductive removal performance of their dyed wool fibres. Importantly, 0.10 mmol L−1 of chromium(VI) species could be almost completely removed by fallen GBL extract dyed wool fibre from water by increasing content of deposited flavonoid compounds up to 8.0 mg g−1, which offer a novel strategy to produce cost-effective, environmental-friendly and renewable chromium(VI) removal material based on waste control by waste. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Extraction of flavonoid compounds from four plant materials - Characterisation of four plant material extracts - Dyeing procedure of wool fibre with plant material extracts - Reducing power evaluation - Chromium(VI) species removal study - Reusability experiments - RESULTS AND DISCUSSION :| Characterisation of four plant material extracts - Optimised dyeing process of wool fibre with the four plant material extracts - Reductive removal of chromium(VI) using plant material extract dyed wool fibres - Chromium(VI) removal kinetics - Recycling capacity study - Seasonal variations of total flavonoid content value and chromium(VI) reduction from Ginkgo biloba L. (GBL) leaves - Comparison with other chromium(VI) removal materials - Table 1 : Chromium(VI) reduction and chromium(III) adsorption pseudo-second-order kinetic model parameters for four plant material extract dyed wool fibres - Table 2 : Comparison of the four dyed wool fibres with several typical chromium(Vl) removal materials DOI : https://doi.org/10.1111/cote.12575 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12575 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37503 [article]

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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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Effect of inorganic salts on ferric oxalate-induced decomposition of CI Acid Black 234 under different weather conditions / Yongchun Dong in COLORATION TECHNOLOGY, Vol. 124, N° 1 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 1 (2008) . - p. 19-26 Titre : Effect of inorganic salts on ferric oxalate-induced decomposition of CI Acid Black 234 under different weather conditions Type de document : texte imprimé Auteurs : Yongchun Dong, Auteur ; Kuixiao Li, Auteur ; Rong Qi, Auteur ; Min Yang, Auteur ; Qiufang Wang, Auteur ; Luchun He, Auteur Année de publication : 2009 Article en page(s) : p. 19-26 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, sodium chloride and sodium sulphate were used for investigating their effects on photocatalytic decomposition of a triazo acid dye, CI Acid Black 234, used widely for the coloration of leather and wool products by the Feiii-oxalate complexes/hydrogen peroxide system under different weather conditions, respectively. Moreover, the photocatalytic degradation and mineralisation of CI Acid Black 234 was also examined by ultraviolet–visible spectrum and total organic carbon measurements. The results indicated that photocatalytic decoloration of CI Acid Black 234 was significantly limited in the presence of inorganic salt. Increasing the concentration of inorganic salt led to a lower decoloration percentage and kinetic reaction constant. The effect of inorganic salt on dye decomposition varied with solar light intensity. Sodium chloride exhibits a much stronger reduction effect on photocatalytic decoloration, degradation and mineralisation than sodium sulphate at similar reaction conditions, especially on a cloudy day. DOI : 10.1111/j.1478-4408.2007.00116.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2007.00116.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3135 [article]

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Novel heterogeneous photocatalysts prepared with waste wool and Fe3+ or Cu2+ ions for degradation of CI Reactive Red 195: a comparative study / Guixin Cui in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 3 (06/2017) . - p. 200-208 Titre : Novel heterogeneous photocatalysts prepared with waste wool and Fe3+ or Cu2+ ions for degradation of CI Reactive Red 195: a comparative study Type de document : texte imprimé Auteurs : Guixin Cui, Auteur ; Yongchun Dong, Auteur ; Yingchao Li, Auteur ; Weifeng Shen, Auteur ; Zhenlei Chen, Auteur Année de publication : 2017 Article en page(s) : p. 200-208 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyseurs métalliques Colorants -- Détérioration Ions métalliques Laine Photocatalyse Recyclage (déchets, etc.) Textiles et tissus -- Recyclage Index. décimale : 667.3 Teinture et impression des tissus Résumé : In order to reuse waste wool, two transition metal ions, Fe3+ and Cu2+, were coordinated to with it to prepare a series of metal–wool complexes as new heterogeneous Fenton photocatalysts for the degradation of a typical azo dye, CI Reactive Red 195, in aqueous solution. The effect of the initial metal ion concentration and temperature on the reaction was investigated. Furthermore, the catalytic performance of the resulting metal–wool complexes was evaluated with respect to the dye decoloration efficiency at different pH levels under visible irradiation. The results demonstrated that increasing the initial metal ion concentration and temperature enhanced ion coordination to produce complexes of increased metal content. The obtained Fe–wool showed a higher metal content than the Cu–wool. The light adsorption performance in the UV and visible regions of Cu–Fe–wool is stronger than that of Fe–wool or Cu–wool. Furthermore, Cu–Fe–Wool was found to have a higher catalytic activity than the other two complexes under visible irradiation, especially in the alkaline pH range. Note de contenu : - METHODS : Materials and reagents - Coordination of wool fibre with metal ions - Morphology and structural characterisation - Catalytic evaluation - RESULTS AND DISCUSSION : Preparation of wool-metal complexes - Characterisation of metal-wool complexes - Catalytic study - Effect of the solution pH DOI : 10.1111/cote.12268 En ligne : https://drive.google.com/file/d/1qZcSDQCgILgJtgWDb-9fHxcMIzg8z-5O/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28644 [article]

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Photoassisted degradation of CI reactive red 195 using and Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst over a wide pH range / Bing Li in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)  

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