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Denim dyeing effluent treatment by electrocoagulation for maximum reduction in indigo and sulphur black dye discharge / Maryam Mudasir in COLORATION TECHNOLOGY, Vol. 138, N° 6 (12/2022)
[article]
Titre : Denim dyeing effluent treatment by electrocoagulation for maximum reduction in indigo and sulphur black dye discharge Type de document : texte imprimé Auteurs : Maryam Mudasir, Auteur ; Sami Ur Rehman, Auteur ; Muhammad Fahad, Auteur ; Ifra Raza, Auteur ; Feroz Alam, Auteur Année de publication : 2022 Article en page(s) : p. 621-631 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants au soufre Les colorants au soufre sont des colorants utilisés pour teindre de façon assez économique des fibres cellulosiques, principalement dans des nuances sombres (noir, brun, bleu foncé). Insolubles à l'état oxydé, ils sont rendus solubles par réduction à la soude caustique pour la teinture, dans un procédé analogue aux colorants de cuve, plus chers.
Les colorants s'obtiennent par action du soufre sur des composés organiques, notamment sur le 2-4-dinitrophénol (Sulphur Black 1) ou le toluène-2-4-diamine et la 4-nitroaniline (Sulphur Brown 12).
Eaux usées -- Epuration
Eaux usées -- Teneur en colorants
Electrocoagulation
Indigo
Jeans
Noir (couleur)Index. décimale : 667.3 Teinture et impression des tissus Résumé : The waste effluents of two different dyes including one vat dye Indigo and one sulphur dye (Stay Black) were treated using continuous electrocoagulation (EC) technique at a denim dyeing plant. A coagulator reactor of 3 L capacity was designed to treat 7.9 L/h to 65.4 L/h of the dye wastewater. Process parameters like pH, flow rate, number of electrodes and material of electrodes were optimised to obtain maximum decrease in chemical oxygen demand (COD) and colour of the effluents before discharge. It was found that by controlling process parameters, COD can be reduced up to 79% and 90% for low concentrated Indigo and sulphur Stay Black dyes, respectively, with a reduction of colour value 98% and 70%, respectively, while for higher effluent concentrations EC efficiency was reported for 81% and 72.3% colour and COD removal, respectively, for indigo dye and 89.3% and 77.6% colour and COD removal, respectively, for sulphur dye. Hence results of the proposed study could provide important information to design a scale up large reactor unit to commercially apply on denim dyeing discharge and control pollution limits of sulphur and sulphates during denim dyeing. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Methods
- RESULTS AND DISCUSSION : Effects of flow rates - Effects of pH of the wastewater - Effects of current density
- Table 1 : Characteristics of different dyeing wastes at the denim dying plant
- Table 2 : Effects of flow rate on chemical oxygen demand (COD), pH, total dissolved solid (TDS) and colour values of diluted indigo dye effluents from fourth washing stream after treatment through electrocoagulation (EC). Initial conditions of untreated sample is pH 11.88, TDS = 5340 mg/L, COD = 2740 mg/L, colour value = 0.5 g/L
- Table 3 : Effects of flow rate on chemical oxygen demand (COD), pH, total dissolved solid (TDS) and colour values of concentrated indigo dye effluents from first washing stream after treatment through electrocoagulation (EC). Initial conditions of untreated sample is pH 10.63, TDS = 5300 mg/L, COD = 5413 mg/L, colour value = 1.100 g/L
- Table 4 : Effect of changing pH on percentage colour and chemical oxygen demand (COD) removal, and zeta potential using nine stainless steel electrodes for indigo dye and six aluminium and three stainless steel electrodes for sulphur black dye
- Table 5 : Effects of electrocoagulation (EC) treatment on pH, total dissolved solid (TDS), chemical oxygen demand (COD) and colour values of indigo dye effluent and sulphur dark black effluent at low concentrations using all nine steel electrodes and three steel with six aluminium electrodes, respectively
- Table 6 : Effects of electrocoagulation (EC) treatment on pH, total dissolved solid (TDS), chemical oxygen demand (COD) and colour values of indigo dye effluent and sulphur dark black effluent at high concentrations using all nine steel electrodes and three steel with six aluminium electrodes, respectivelyDOI : https://doi.org/10.1111/cote.12625 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12625 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38376
in COLORATION TECHNOLOGY > Vol. 138, N° 6 (12/2022) . - p. 621-631[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23716 - Périodique Bibliothèque principale Documentaires Disponible Determination of the reactive dye navy blue her in the wastewaters of the dyeing processes of chrome-tanned leather / L. S. P. Santos in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 10 (10/2014)
[article]
Titre : Determination of the reactive dye navy blue her in the wastewaters of the dyeing processes of chrome-tanned leather Type de document : texte imprimé Auteurs : L. S. P. Santos, Auteur ; L. F. Crispim, Auteur ; N. M. C. Silva, Auteur ; N. S. Oliveira, Auteur Année de publication : 2014 Article en page(s) : p. 330-341 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants réactifs
Eaux usées -- Analyse
Eaux usées -- Teneur en colorants
Echantillonnage
Etalonnage
Spectrophotométrie UV-VisibleIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : One of the main environmental problems in the leather industry is the contaminant load and amount of effluent produced during the industrial process. From these effluents we can highlight those resulting from the dyeing processes that contribute to the increase of the COD and BOD of the discharged wastewaters. The aim of the present work is to develop and validate simple, rapid, specific, selective, precise, robust and economical UV-Vis Spectrophotometric method for the estimation of reactive dye (Navy Blue Her) in aqueous solutions and effluents of the dyeing processes of chrome-tanned leather. UV-Vis Spectrophotometric measurement was carried out at a wavelength of maximum absorbance of 610 nm using ultrapure water as the solvent. The developed method was validated with respect to specificity, selectivity, sensitivity, limits of detection and quantification, linearity, precision (repeatability, intermediate precision) and robustness. The calibration curve (Abs = 0.01054C + 0.00067) is linear (r2 = 0.99998) in the concentration range from 3.0 mg/L up to 48.0 mg/L. The limit of detection (LOD) and the limit of quantification (LOQ) are 0.206 mg/L and 0.624 mg/L, respectively. The analysis results and its statistical treatment have proved that this analytical method is specific, selective, precise and robust, and has good repeatability and intermediate precision. Thus the proposed method was approved for all the analyzed parameters, being therefore, properly validated, and can be successfully applied for the estimation of reactive dye (Navy Blue Her) in aqueous solutions and effluents of the dyeing processes of chrome-tanned leather. Note de contenu : - EXPERIMENTAL : 1. Apparatus - 2. Materials and reagents - 3. Stock production preparation - 4. Standard solutions preparation - 5. Preparation of standard solutions to establish the calibration curve - 6. Preparation of real effluent samples - 7. Description of the experimental tests : a. UV-Vis spectrophotometric measurements - b. Calibration curve - 8. Validation of the method in study : a. Specificity and selectivity - b. Linearity and linear range - c. Precision - d. Stability of reactive dye solution - e. Robustness
- RESULTS AND DISCUSSION : 1. Absorption spectra of the dye solutions and samples of real effluents - 2. Calibration cyrve - 3. Validation of the method in study : a. Specificity and selectivity - b. Sensitivity - c. Linearity and linear range - d. Limit of Detection (LOD) and limit of quantification (LOQ) - e. Measurement range - f. Precision - g. Stability of reactive dye solutions - h. Robustness - 4. Determination of the reactive dye concentration in samples of real effluentsEn ligne : https://drive.google.com/file/d/1VI8Z4XV89rWj5g0Q8u3NLqxnKYywFxGm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22079
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 10 (10/2014) . - p. 330-341[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16559 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of immobilized Panus conchatus bio-balls for fur dye wastewater / Ding Shaolan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 5 (09-10/2016)
[article]
Titre : Preparation and characterization of immobilized Panus conchatus bio-balls for fur dye wastewater Type de document : texte imprimé Auteurs : Ding Shaolan, Auteur ; Xie Linhua, Auteur ; Dong Lingxiao, Auteur ; Jing Wang, Auteur Année de publication : 2016 Article en page(s) : p. 241-245 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alginate de calcium L'alginate de calcium ou polymannuronate calcique, de formule (C6H7Ca1/2O6)n, est un additif alimentaire (E404) utilisé dans les boissons, constitué d'alginate et de calcium. Il s'agit d'une longue molécule synthétisée à partir de l'acide alginique, extrait d'algues brunes, constitué d'unités glucidiques formant une chaîne.
Bains de teinture
Bains de teinture -- Epuration
Champignons et constituants
Eaux usées -- Epuration
Eaux usées -- Teneur en colorants
Fourrures -- Teinture
Glutaraldéhyde
LaccasesLes laccases (EC 1.10.3.2) appartiennent à une famille d'enzymes ayant pour cofacteur du cuivre. C'est une oxydase (oxydoréductase, EC 1) que l'on retrouve dans de nombreuses plantes, champignons et micro-organismes.
Le cuivre est lié sur plusieurs sites de la protéine. On distingue trois types. Les types 2 et 3 sont appelés grappe tri-nucléaire. Le cuivre du type 1 est soluble dans l'eau. Le mercure déplace le cobalt complexé dans les laccases. Les complexants du cuivre peuvent le déplacer et le remplacer par du cobalt. Les cyanures complexent également le cuivre, mais dans ce cas il n'est pas possible de réinsérer du cobalt.
Les laccases oxydent les dérivés phénoliques mais d'une façon ménagée qui transforme la lignine en monolignol.
Polyacétate de vinyleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Using four carriers, Panus conchatus with the highly effective decoloration producing laccase was immobilized by the embedding method. By comparing their balling performance and the mechanical strength, the optimal immobilized carrier was determined. The feasibility of the immobilized Panus conchatus for decoloration of fur dye industrial wastewater was studied. The results show that the immobilized bio-balls have the higher dye decoloring speed and rate than those of the free Panus conchatus. The immobilized prepared by PVA complex embedding method have the better comprehensive performances so as to shorten the decoloring time and increase the decoloring rate. The decoloring rates of the immobilized bio-balls to the acid dyes and the disperse dyes are 98.09% and 91.47% respectively. Note de contenu : - EXPERIMENTAL PROCEDURES : Apparatus and materials - Preparation of culture medium, and the activity and the culture of the thalli - Preparation of the immobilized Panus conchatus bio-balls
- RESULTS AND DISCUSSION : Comparison of the performances of the bio-balls prepared by the different immobilized carriers - Experimental results and discussion of the decoloring performance of CA-glutaraldehyde bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of PVA-CA bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of PVC complex bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of SA-CA-PAC bio-balls on the fur dyes - Experimental results and discussion of the decoloring performance of free Panus conchatus on the fur dyesEn ligne : https://drive.google.com/file/d/1iBVHUqrzYjS5NIm3CDLr7HWnylmrwQUl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27088
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 5 (09-10/2016) . - p. 241-245[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18411 - Périodique Bibliothèque principale Documentaires Disponible Removal of anionic dye from tannery wastewater using peanut shell waste as a biosorbent / Samantha Feron de Moraes in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 1 (01/2023)
[article]
Titre : Removal of anionic dye from tannery wastewater using peanut shell waste as a biosorbent Type de document : texte imprimé Auteurs : Samantha Feron de Moraes, Auteur ; Patrice Monteiro de Aquim, Auteur ; Bethania Brochier, Auteur ; Amanda Gonçalves Kieling, Auteur ; Everton Hansen, Auteur Année de publication : 2023 Article en page(s) : p. 42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbants et adsorbants
Caractérisation
Colorants -- Elimination
Colorants acides
Coque d'arachide
Cuir synthétique
Eaux usées -- Analyse
Eaux usées -- Epuration
Eaux usées -- Teneur en colorants
Essais (technologie)
StatistiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Contamination of water bodies by organic substances, such as dyes, cause impacts on the environment and human health. Furthermore, the search for environmentally appropriate destinations for solid waste, such as those from agro-industries, has been intensifying, to minimize the impact of the growing generation of waste as a result of population growth. Thus, this work aimed to evaluate the use of raw peanut shells as an alternative adsorbent for the removal of Brown acid dye from synthetic leather dyeing wastewater. The peanut shells were milled and sieved. The material was characterized by Fourier Transform Infrared Spectroscopy. The parameters evaluated in the adsorption tests were pH, contact time, and mass of adsorbent material. The maximum adsorption capacity verified for the peanut shell was 7.753 mg/g and up to 93% of the dye was removed. The best adsorption conditions were at pH 2.5, 10 minutes, and adsorbent mass of 0.3 g in 50 mL of effluent. The results showed relevant removal of the Brown acid dye by the peanut shells’ adsorbent material. Note de contenu : - EXPERIMENTAL : Preparation of peanut shells - Analysis of peanut shells by Fourier Transform Infrared spectroscopy - Preparation of synthetic wastewater containing dye - Adsorption experiments - Statistical analysis
- RESULTS AND DISCUSSION : Analysis of peanut shells by Fourier Transform Infrared spectroscopy - Adsorption experiments
- Table 1 : Removal efficiency and sorption capacity of dyes by peanut shellDOI : https://doi.org/10.34314/jalca.v118i1.6414 En ligne : https://drive.google.com/file/d/1_W8sxqmpNw3ySEwGZPgzZjYt_hY9Ph-K/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39163
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 1 (01/2023) . - p. 42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24007 - Périodique Bibliothèque principale Documentaires Disponible A rescue of colors from dye-wastewater / Saloana Santina Gomes Santos in L'ACTUALITE CHIMIQUE, N° 444-445 (10-11/2019)
[article]
Titre : A rescue of colors from dye-wastewater : a rescue of colors from dye-wastewater Type de document : texte imprimé Auteurs : Saloana Santina Gomes Santos, Auteur ; Francisco Rodrigues, Auteur ; Maria Gardênnia Fonseca, Auteur Année de publication : 2019 Article en page(s) : p. 22-28 Note générale : Bibliogr. Langues : Français (fre) Catégories : Argile
Colorants -- Adsorption
Eaux usées -- Décontamination
Eaux usées -- Epuration
Eaux usées -- Recyclage
Eaux usées -- Teneur en colorants
Montmorillonite
Photostabilité
PigmentsIndex. décimale : 667.2 Colorants et pigments Résumé : Contaminants such as dyes unproperly discharged in the environment are a big problem to overcome. Some technologies have been developed and applied for dye-wastewater treatment before its disposal in the waterbodies. Among them, adsorption is highlighted and a plenty of adsorbents are proposed in the literature.
This paper presents some clay minerals-based adsorbents applied for the rescue of colors from dye-wastewater, and the development of new pigments for artworks as an alternative to reuse the dyed adsorbents.Note de contenu : - Dyestuffs and the color paradox
- How to remove color from dye-wastewater ?
- The adsorption approaches
- How to characterize the adsorbents ?
- Custom-made clay-based solids for dye removal
- What about the adsorbents after dye removal ? How to discharge them ?
- Dyed adsorbent as new pigments
- Towards new stable and environmentally friendly pigments
- Fig. 1 : Treatment methods for the removal of dyes from wastewater effluent
- Fig. 2 :Adsorption process with adsorbent regeneration step for dyed-water decoloring
- Fig. 3 : Main analytical techniques for characterization of adsorbents
- Fig. 4 : Effect of the time in the dye removal for KSF-montmorillonite C12NH3+ hybrid
- Fig. 5 : KSF-montmorillonite/chitosan beads as adsorbent for Remazol blue dye
- Fig. 6 : Color variation of the hybrids as a function of the exchanged cation
- Fig. 7 : Solid pigments based on alizerin and carminic acid adsorbed onto Al-pillared clay and Ti-pillared clay and oil paint formulations based on these pigments before and after light irradiation
- Fig. 8 : Color of the pigments before and after 400 h under light exposure. Representation ageing of pigments followed by color change observations
- Table 1 : Some classification dyes based on chemical structure
- Table 2 : Examples of clay and clay-based solids as adsorbents for Remazol blue dyePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33040
in L'ACTUALITE CHIMIQUE > N° 444-445 (10-11/2019) . - p. 22-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21257 - Périodique Bibliothèque principale Documentaires Disponible The effects of heat treatment temperatures on photocatalytic activity of cobalt ferrite nanoparticles synthesised by microwave-assisted combustion method / Ibrahim Hakki Karakas in COLORATION TECHNOLOGY, Vol. 139, N° 3 (06/2023)
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