Comparison of different ultrasound support methods during colour and chemical oxygen demand removal of disperse and reactive dyebath solutions by ozonation / Hüseyin Aksel Eren in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 446-453 Titre : Comparison of different ultrasound support methods during colour and chemical oxygen demand removal of disperse and reactive dyebath solutions by ozonation Type de document : texte imprimé Auteurs : Hüseyin Aksel Eren, Auteur ; Ozan Avinc, Auteur ; Burcu Erismis, Auteur Année de publication : 2012 Article en page(s) : p. 446-453 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage Décoloration Eaux usées -- Recyclage Ozonation Ultrasons Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the effects of ozonation, ozonation with ultrasonic bath and ozonation with ultrasonic homogeniser processes on colour and chemical oxygen demand removal properties of disperse (CI Disperse Red 60, CI Disperse Blue 337) and reactive (CI Reactive Blue 171 and CI Reactive Blue 19) dyebath solutions with and without dyeing auxiliaries were investigated. Chemical oxygen demand (in mg/l) and colour (in Hazen) measurements of the studied dyebath solutions were determined. The ozonation process caused simultaneous chemical oxygen demand removal during decolorisation. However, the improvement in chemical oxygen demand reduction was less than of that on decolorisation. The application of the combination of ozonation with ultrasonic homogeniser is the most efficient process and creates a great time advantage over the other process types studied (ozonation alone and ozonation with ultrasonic bath) to reach the same colour and levels of chemical oxygen demand removal. Note de contenu : - EXPERIMENTAL : Materials - Preparation of dye solutions - Combined use of ozonation andultrasound technologies for decolorisation and chemical oxygen demand removal of effluents from the textile dyeing process - Colour measurement of dyebath solution - Chemical oxygen demand evaluation - RESULTS AND DISCUSSION : Decolorisation of reactive and disperse dyebath solutions - Chemical oxygen demand removal after ozonation and the combination processes DOI : 10.1111/j.1478-4408.2012.00398.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00398.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16449 [article]

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Concentration and re-use of tannery dyeing-fatliquoring effluent by ultrafiltration / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 3 (05-06/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 3 (05-06/2014) . - p. 108-112 Titre : Concentration and re-use of tannery dyeing-fatliquoring effluent by ultrafiltration Type de document : texte imprimé Auteurs : Hongru Wang, Auteur ; Wang Yong, Auteur ; Li Yongjian, Auteur ; Liu Xiaoxia, Auteur Année de publication : 2014 Article en page(s) : p. 108-112 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage Cuirs et peaux -- Teinture Eaux usées -- Recyclage Filtration Membranes (technologie) Polysulfones Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Spent dyeing-fatliquoring baths contain a large quantity of pollutants including polymers, dyestuffs, emulsified oils and additives. In order to reduce the pollution, the spent dyeing-fatliquoring bath was concentrated and re-used in the dyeing-fatliquoring process. The solutes in the bath were evaluated in terms of COD, total nitrogen, total solid, ash and dyestuff. The effects of the volume reduction factor on permeate flux and solute retentions were investigated during the concentration. The characteristics of concentrate and permeate, as well as membrane regeneration were measured during the re-use. The results show that a steady permeate flux of 41.9L/rn2h with retentions of above 91% of COD and above 95% of dyestuffs can be obtained at 25°C under a trans-membrane pressure of 0.09MPa when the volume reduction factor reached 2.0. At this volume reduction factor, ail the concentrate can be recycled in the dyeing-fatliquoring process, and ail of the permeate can be re-used in neutralizing process. No accumulation of solutes was found during the re-use of the concentrate stream. The concentration and re-use process has the good potential for industrial application. Note de contenu : - EXPERIMENTAL PROCEDURES : Preparation of polysulfone UF membrane - Concentration of spent dyeing-fatliquoring baths - Membrana regeneration - Re-use of the permeate - Re-use of the concentrate - Measurement of spent dyeing-fatliquoring bath - Inspection fo the crust leather - RESULTS AND DISCUSSION : Efficiency of concentration - Cleaning performance of membrane - Characteristics of concentrate and permeate in re-use - effect of the re-use on dyeing-fatliquoring En ligne : https://drive.google.com/file/d/1oy0fvesqtKeotgTSBMBPGze0rG-cndzw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21530 [article]

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Decolorisation by Bacillus flexus of exhausted dyebaths containing CI Acid Red 249 and their reuse for wool dyeing / Neha D. Parmar in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 3 (06/2017) . - p. 218-222 Titre : Decolorisation by Bacillus flexus of exhausted dyebaths containing CI Acid Red 249 and their reuse for wool dyeing Type de document : texte imprimé Auteurs : Neha D. Parmar, Auteur ; Sanjeev R. Shukla, Auteur Année de publication : 2017 Article en page(s) : p. 218-222 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bactéries Bains de teinture -- Epuration Bains de teinture -- Recyclage Colorants acides Décoloration Laine Photostabilité Résistance au lavage Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : A dyebath containing left-over CI Acid Red 249 after dyeing of wool was completely decolorised using an isolated bacteria Bacillus flexus. Optimisation was carried out by varying the pH, temperature, dye concentration, and microbial loading. Complete decolorisation of a 50 mg l?1 dye solution was achieved in 8 h at pH 7 and 37 °C with 10% v/v loading of the bacteria. The decolorised bath was utilised for dyeing of wool fabric with the same dye at 5% shade. This cycle of dyeing–decolorising–dyeing was repeated 5 times. The evaluation of dyed fabric was done using K/S, colour values, and fastness to light and washing. Comparison of a sample dyed with the conventional exhaust process showed that the dyeing quality is not affected for all five successive reuse cycles. The results are important from the viewpoint of reducing water consumption and chemicals. Note de contenu : - EXPERIMENTAL : Dyes and chemicals - Mircoorganism and culture conditions - Decolorisation experiment - Determination of TOC and COD - Wool dyeing - Reuse of the decolorised bath - Dye uptake - Measurement of K/S - Evaluation of washing fastness - Evaluation of yellowness index - Evaluation of light fastness - RESULTS AND DISCUSSION : Optimisationof physicochemicam parameters for AR 249 dye decolorisation - Effect of pH on dyebath decolorisation - Effect of temperature on dyebath decolorisation - Effect of dye concentration on dyebath decolorisation - COD and TOC removal during degradation of AR 249 dye - Colour values for dyeing by repeated used of the decolorised dyebath DOI : 10.1111/cote.12270 En ligne : https://drive.google.com/file/d/1144X26waHSfIs9IgsV9wezIZKoJyHshy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28646 [article]

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Electrochemical treatment of Methyl Orange dye wastewater by rotating disc electrode : optimisation using response surface methodology / Palani Ramasamy in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 434-439 Titre : Electrochemical treatment of Methyl Orange dye wastewater by rotating disc electrode : optimisation using response surface methodology Type de document : texte imprimé Auteurs : Palani Ramasamy, Auteur ; Natesan Balasubramanian, Auteur Année de publication : 2012 Article en page(s) : p. 434-439 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage Colorants -- Détérioration Colorants -- Oxydation Eaux usées -- Recyclage Electrochimie Réacteurs électrochimiques Surfaces de réponse (statistique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In the present investigation, a novel rotating disc electrochemical reactor has been developed to treat Methyl Orange dye effluent. Stainless steel and ruthenium oxide-coated titanium electrodes were used as cathode and anode, respectively. A statistical tool of the Box–Behnken method has been used to design the experimental run and optimisation. The combined effect of the operating parameter on the efficiency of the process has been critically examined. A quadratic model for reduction of chemical oxygen demand has been developed. A maximum of 96% chemical oxygen demand removal was observed under optimum conditions. The degradation mechanism was studied by ultraviolet–visible spectrophotometer, Fourier Transform–infrared and high-performance liquid chromatography. From the present investigation, it has been observed that dyehouse effluent can be effectively treated using the novel electrochemical reactor. Note de contenu : - EXPERIMENTAL : Response surface methodology - RESULTS AND DISCUSSION : The combined effect of operating parameters on dye effluent degradation - Electrolysis performance under optimum condition - Instrumental analysis of raw and treated effluent DOI : 10.1111/j.1478-4408.2012.00387.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00387.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16444 [article]

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Ozone applications for after-clearing of disperse-dyed poly(lactic acid) fibres / Ozan Avinc in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 479-487 Titre : Ozone applications for after-clearing of disperse-dyed poly(lactic acid) fibres Type de document : texte imprimé Auteurs : Ozan Avinc, Auteur ; Hüseyin Aksel Eren, Auteur ; Pinar Uysal, Auteur Année de publication : 2012 Article en page(s) : p. 479-487 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Recyclage Décoloration Ozonation Polylactique, Acide L'acide polylactique (anglais : polylactic acid, abrégé en PLA) est un polymère entièrement biodégradable utilisé dans l'alimentation pour l'emballage des Å“ufs et plus récemment pour remplacer les sacs et cabas en plastiques jusqu'ici distribués dans les commerces. Il est utilisé également en chirurgie où les sutures sont réalisées avec des polymères biodégradables qui sont décomposés par réaction avec l’eau ou sous l’action d’enzymes. Il est également utilisé pour les nouveaux essais de stent biodégradable. Le PLA peut-être obtenu à partir d'amidon de maïs, ce qui en fait la première alternative naturelle au polyéthylène (le terme de bioplastique est utilisé). En effet, l'acide polylactique est un produit résultant de la fermentation des sucres ou de l'amidon sous l'effet de bactéries synthétisant l'acide lactique. Dans un second temps, l'acide lactique est polymérisé par un nouveau procédé de fermentation, pour devenir de l'acide polylactique. Ce procédé conduit à des polymères avec des masses molaires relativement basses. Afin de produire un acide polylactique avec des masses molaires plus élevées, l'acide polylactique produit par condensation de l'acide lactique est dépolymérisé, produisant du lactide, qui est à son tour polymérisé par ouverture de cycle. Le PLA est donc l’un de ces polymères, dans lequel les longues molécules filiformes sont construites par la réaction d’un groupement acide et d’une molécule d’acide lactique sur le groupement hydroxyle d’une autre pour donner une jonction ester. Dans le corps, la réaction se fait en sens inverse et l’acide lactique ainsi libéré est incorporé dans le processus métabolique normal. On obtient un polymère plus résistant en utilisant l'acide glycolique, soit seul, soit combiné à l’acide lactique. Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the effectiveness of the ozonation process, in neutral distilled water at room temperature, as a clearing process for disperse-dyed poly(lactic acid) fibre fabrics is investigated. The efficiency of simultaneous decolorisation of dyebath effluent and clearing of dyed poly(lactic acid) in the cooled dyebath after completion of the poly(lactic acid) dyeing cycle is also explored. Conventional alkaline reduction clearing with sodium dithionite was chosen as a control clearing process for comparison. Wash fastness, colour difference, colour removal (in Hazen) and chemical oxygen demand values were determined and compared. Long ozone treatment times at high ozone dose resulted in unacceptable colour differences. The colour difference problem was solved by use of lower ozone dose; however, a warm soaping step had to be added to the after-clearing sequence in order to achieve the desired fastness properties. A 33% reduction on the chemical oxygen demand load of the total process (dyeing + after-clearing) could be achieved by ozone after-clearing instead of using a conventional reduction clearing treatment. The addition of the warm soaping step to improve the fastness properties of the ozonated samples increased the total chemical oxygen demand of the process (dyeing + ozonation in water + warm soaping), but a 12–18% reduction on the chemical oxygen demand load of the total process was observed when compared with the conventional treatment sequence (dyeing + reduction clearing). Note de contenu : - EXPERIMENTAL : Materials - Preparation and dyeing of PLA fibres - Clearing of dyed PLA fabrics - Ozone application - Colour difference measurements - Assessment of wash fastness - Chemical oxygen demand evaluation - Dyebath effluent colour measurements - RESULTS AND DISCUSSION : The effect of ozonation at high ozone dose on wash fastness of dyed PLA fabrics - The effect of a additional warm soaping process after ozonation at high ozone dose on the wash fastness of dyed PLA fabrics - The effect of ozonation at alow ozone dose with a warm soaping process on the wash fastness of dyed PLA fabrics - Colour and chemical oxygen demand removal of dyebath effluent after ozonation (after-clearing) treatments DOI : 10.1111/j.1478-4408.2012.00403.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00403.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16454 [article]

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Reuse of the water and salt of reactive dyeing effluent after electrochemical decolorisation / Víctor López-Grimau in COLORATION TECHNOLOGY, Vol. 128, N° 1 (2012)  

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Valorisation des effluents / P. Moulin in L'INDUSTRIE TEXTILE, N° 1354/55 (09-10/2003)  

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