Iron(III) complexes promote hydrogen peroxide activation for efficient degradation of dyeing wastewater / Shouying Wu in COLORATION TECHNOLOGY, Vol. 140, N° 3 (06/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 3 (06/2024) . - p. 496-506 Titre : Iron(III) complexes promote hydrogen peroxide activation for efficient degradation of dyeing wastewater Type de document : texte imprimé Auteurs : Shouying Wu, Auteur ; Linping Zhang, Auteur ; Jianing Fan, Auteur ; Wei Wu, Auteur ; Bolin Ji, Auteur ; Xueling Feng, Auteur ; Bijia Wang, Auteur ; Yimeng Ma, Auteur ; Yi Zhong, Auteur ; Hong Xu, Auteur ; Zhiping Mao, Auteur Année de publication : 2024 Article en page(s) : p. 496-506 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyse Catalyseurs métalliques Colorants -- Détérioration Complexes métalliques Eaux usées -- Décontamination Eaux usées -- Epuration Fer trivalent Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Index. décimale : 667.3 Teinture et impression des tissus Résumé : Coordination complexes were widely used in advanced oxidation processes. The ligands with various substituents could lead to differences in the catalytic properties and mechanisms. In this work, the iron(III)–N,N′-dipicolinamide (FeL) complexes (the iron(III) complexes with substituents –CH3, –H, –Cl and –NO2 named as FeL1, FeL2, FeL3 and FeL4, respectively) were used to activate hydrogen peroxide (H2O2) for degrading dyes wastewater. Mechanism studies indicated that the FeL4/H2O2 system contains the FeV=O in addition to the same •OH and O2•− as the other systems, which made it exhibit more excellent performance than others. The results of the performance tests showed that the FeL4/H2O2 system could remove 97%, 89%, 100%, 83%, 100%, and 99% of RR195, RY145, RB194, RB19, MB, and RhB, respectively, which proved the good application performance of the FeL4/H2O2 system. In addition, the performance of the FeL4/H2O2 system was not influenced by anions and natural organics. This study verified the feasibility of modulating the catalytic performance of the complexes by changing the substituents and provided an efficient catalytic system for dyeing wastewater treatment. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of ligands - Preparation of FeL - Degradation experimental procedure - Analytical methods - RESULTS AND DISCUSSION : Characterisation of structures - Substituents effects of the FeL complexes - Influence of reaction parameters on the catalytic performance of FeL4/H2O2 system - Application of FeL4/H2O2 system for degradation of dyes DOI : https://doi.org/10.1111/cote.12727 En ligne : https://drive.google.com/file/d/1zCOydXOBsDdkM88Wb6Rj2dGzz1no_U8E/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40965 [article]

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A study of the diffusion behaviour of reactive dyes in cellulose fibres using confocal Raman microscopy / Binfan Yang in COLORATION TECHNOLOGY, Vol. 136, N° 6 (12/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 6 (12/2020) . - p. 503-511 Titre : A study of the diffusion behaviour of reactive dyes in cellulose fibres using confocal Raman microscopy Type de document : texte imprimé Auteurs : Binfan Yang, Auteur ; Yamin Dai, Auteur ; Yi Zhong, Auteur ; Linping Zhang, Auteur ; Hong Xu, Auteur ; Bijia Wang, Auteur ; Xiaofeng Sui, Auteur ; Xueling Feng, Auteur ; Zhize Chen, Auteur ; Zhiping Mao, Auteur Année de publication : 2020 Article en page(s) : p. 503-511 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants réactifs Diffusion (physique) Fibres cellulosiques Microscopie confocale Raman Morphologie (matériaux) Produits chimiques -- Purification Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Confocal Raman microscopy was used as a non-destructive tool for in situ investigation of the diffusion of CI Reactive Blue 194 in viscose fibres. Dyed fibres were analysed by Raman depth imaging along the radius at different dyeing times (30, 60, 90, 120, 150, 180, 240, 300, 600, 900, 1200, 1500, 1800, 2100 and 2400 seconds) and temperatures (30, 40, 50, 60, 70 and 80°C). The dye concentration in the fibre was expressed by normalising the characteristic peak of dyes at 1577 cm−1 to eliminate the interference of the fibre. The Raman depth mapping images showed that dye molecules gradually diffused to the interior of the fibre with an increase in dyeing time, remaining ring-shaped in the state of diffusion. In addition, the diffusion rate increased with increases in the dyeing temperature. This was understandable because dye molecules with a higher kinetic energy move faster. It was also found that the external structure of fibres played a significant role in the diffusion behaviour of CI Reactive Blue 194 during the initial stage of dyeing. The concentration gradient distribution of CI Reactive Blue 194 in the fibre was reflected by Raman depth mapping. The study demonstrates the potential of confocal Raman microscopy for monitoring the dynamic diffusion of dye molecules in fibres. Note de contenu : - EXPERIMENTAL : Dye purification - Preparation of dyed fibres - Confocal Raman microscopy - Scanning electron microscopy - RESULTS AND DISCUSSION : Morphology structure characterisation of viscose fibres - Raman depth mapping of reactive dyes in the viscose fibres - Raman intensity distribution DOI : https://doi.org/10.1111/cote.12503 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12503 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34704 [article]

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Study on the effect of different dyeing systems on the interaction of multi-component reactive dyes by Raman spectroscopy / Yamin Dai in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 520-529 Titre : Study on the effect of different dyeing systems on the interaction of multi-component reactive dyes by Raman spectroscopy Type de document : texte imprimé Auteurs : Yamin Dai, Auteur ; Hong Xu, Auteur ; Yi Zhong, Auteur ; Linping Zhang, Auteur ; Xiaofeng Sui, Auteur ; Xueling Feng, Auteur ; Bijia Wang, Auteur ; Zhiping Mao, Auteur Année de publication : 2021 Article en page(s) : p. 520-529 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu (couleur) Colorants -- 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). Essais (technologie) Jaune Rouge (couleur) Spectroscopie Raman Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The interaction of dye molecules in different adsorption systems is diverse, which affects the adsorption process. In this work, the real-time adsorption process of CI Reactive Red 195 (RR195), CI Reactive Yellow 145 (RY145), and CI Reactive Blue 194 (RB194) in the actual dyeing process have been studied on cotton fabric by Raman spectroscopy. Three single, three binary, and one ternary system have been investigated at different temperatures (40, 50, 60, and 80°C). The equilibrium dye-uptake of RR195 and RY145 on cotton fabric decreased with the addition of other components, while that of RB194 remained unchanged. The temperature has little effect on the dyeing of cotton fabric with the RR195/RY145 system. The RR195/RB194 system is more suitable for high-temperature dyeing. RY145 is less affected by temperature below 60°C while dyeing at 80°C is greatly affected by temperature in the four systems. RB194 with a higher substantivity to the cotton fibre is less affected by temperature in the four systems. The batch adsorption rate data for the seven systems have been analysed based on pseudo-second-order kinetics. The results showed that the increase in temperature can accelerate the dyeing rate and time for dye adsorption to reach equilibrium. Activation parameters revealed the potential barrier that dyes need to overcome when dyeing cotton fabrics in different systems. In the actual combination dyeing process, the analysis of each component process can optimise the dye formulation and improve the dye utilisation. Note de contenu : - MATERIALS AND METHODS : Materials and chemicals - Raman spectroscopy - Adsorption process test - RESULTS AND DISCUSSION : Adsorption process - Effect of different systems - Effect of temperature - Adsorption kinetics - Activation parameters - Table 1 : Initial system conditions for the adsorption process - Table 2 : The Arrhenius plot for RR195, RY145, and RB194 on cotton fabric at different temperatures in four adsorption systems DOI : https://doi.org/10.1111/cote.12549 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12549 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36509 [article]

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