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Effect of different unhairing methods on the ionic liquid based fiber opening process / Z. Mohammad Jamal Azhar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 6 (06/2016)
[article]
Titre : Effect of different unhairing methods on the ionic liquid based fiber opening process Type de document : texte imprimé Auteurs : Z. Mohammad Jamal Azhar, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Nishad Fathima Nishter, Auteur Année de publication : 2016 Article en page(s) : p. 206-212 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés organoleptiques
Eaux usées -- Analyse
Environnement -- Etudes d'impact
Epilage
Liquides ioniques
Morphologie (matériaux)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather processing is known to impact the environment, especially the pre-tanning processes. Lime sludge is one of the major concerns for the industry. Application of ionic liquid (1- butyl 3- methylimidazolium chloride) instead of conventional reliming practice can reduce this problem to a large extent. In this study, the effect of different unhairing process on the fiber opening using ionic liquids has been studied. The extent of fiber opening was assessed for both control and experimental pelts through SEM analysis. The experimental pelts were found to have better fiber opening than the control. The ionic liquid fiber opened pelts were tanned and the spent liquors were assessed for the chrome content, COD, TDS. The results indicate that all the environmental parameters are better or on par with the conventional process. The final leathers made were also found to have physical characteristics similar to that of conventionally limed leathers. Note de contenu : - EXPERIMENTAL : Materials - Ionic liquid based fiber opening process - Morphological analysis - Physical characteristics - Spent liquor analysis - Organoleptic properties
- RESULTS AND DISCUSSION : Effect of IL fiber opening on shrinkage temperature of leathers - Effect of IL opening on physical strength characteristics of leathers - Effect of IL fiber opening on fiber structure of leathers - Environmental impact analysis - Organoleptic properties - Significance of the studyEn ligne : https://drive.google.com/file/d/1SXoeTcMOxVlJGWn8TLuxIi2V5DQXDW7f/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26438
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Code-barres Cote Support Localisation Section Disponibilité 18139 - Périodique Bibliothèque principale Documentaires Disponible Efficient and ecological leather processing : replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride / Hui Liu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
[article]
Titre : Efficient and ecological leather processing : replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride Type de document : texte imprimé Auteurs : Hui Liu, Auteur ; Keyong Tang, Auteur ; Xiumin Li, Auteur ; Jie Liu, Auteur ; Xuejing Zheng, Auteur ; Ying Pei, Auteur Année de publication : 2022 Article en page(s) : 13 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaux Sulfurée
Chlorure de 1-allyl-3-méthylimidazolium
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de bovins
Dispaseest une protéase qui clive la fibronectine , le collagène IV et dans une moindre mesure le collagène I. Elle se trouve dans certaines bactéries et peut être isolée à partir de filtrats de culture de Bacillus polymyxa . Il peut être extrait, purifié et utilisé dans la recherche. Il peut être particulièrement utile de séparer les épithéliums embryonnaires et le mésenchyme . La Dispase II est spécifique du clivage des liaisons leucine - phénylalanine .
La Dispase est souvent utilisée pour digérer les cellules primaires adhérentes en culture, car ce traitement s'est avéré plus doux que la digestion à la trypsine. (Wikipedia)
Eaux usées -- Analyse
Epilage
Produits chimiques -- Suppression ou remplacement
Ressources renouvelables
Stabilité hydrothermaleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is a collagen-based biomass prepared from raw skins or hides by a series of unit operations, in which the unhairing and fiber opening are extremely important operations. However, the conventional Na2S/Ca(OH)2 system used in unhairing and fiber opening has given rise to the pollution to the environment. It is necessary to develop substitute technology for the Na2S/Ca(OH)2. In the present study, 1-allyl-3-methylimidazolium chloride ([AMIm]Cl) was used to cooperate with dispase for cycle unhairing and one-pot beamhouse to recycle waste bovine hides and compared with conventional processing. During those processes, the mechanism of [AMIm]Cl-dispase synergistic unhairing and collagen fibers opening were studied. Besides, plant hazard, organic matter and [AMIm]Cl of wastewater from [AMIm]Cl-dispase process were respectively investigated and separated to evaluate the environmental and economic benefits of the [AMIm]Cl-dispase process. As a result, enzyme activity after unhairing by [AMIm]Cl-diapase system for using 5 times is higher than that by KCl-dispase system, and needs lower unhairing time, which is because of rapid penetration of [AMIm]Cl-dispase solution in bovine hides. For this reason, the tensile strength and elastic modulus of tanned leather from [AMIm]Cl-dispase process are higher than those from the KCl-diapase and conventional processes, and its hydrothermal shrinkage temperature is comparable to that of the conventional one. Because of the 58.13% lower wastewater discharge (WD), 66.60% lower total solids (TS), 97.23% lower ammonia nitrogen (NH3-N), non-toxic wastewater and organic matter recovery in wastewater are reached from [AMIm]Cl-dispase process, which is expected to be an alternative to the conventional process to reduce environmental pollution and realize the sustainable development of technology for leather manufacturing. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Experimental and conventional processes - Investigation of the dispase penetration by FITC - Organic matter and saline solution separation in wastewater - The harm of wastewater to plant growth
- RESULTS AND DISCUSSION : Effect of [AMIm]Cl-dispase synergistic cycle unhairing - Effect of [AMIm]Cl-dispase ecological beamhouse - Hydrolysis of interfibrillar substance in hides - Distribution of dispase - Mechanism of one-pot beamhouse and recovery of organic matter in wastewater - Grain morphology and collagen fibers aggregation structure of tanned leathers - Physical and hydrothermal properties of tanned leather - Environmental and economic benefits
Table 1 : Physical properties and hydrothermal stability of tanned leathers from conventional (C), KCl-dispase (KCl/D) and [AMIm]Cl-dispase ([AMIm]Cl/D) processes
- Table 2 : Pollutant loads and wastewater discharge (WD) from different methods (unit: kg/t of raw hide)DOI : https://doi.org/10.1186/s42825-022-00086-3 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-022-00086-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37580
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 4 (Année 2022) . - 13 p.[article]Efficient removal of total nitrogen from tannery wastewater by promoting denitrification with sodium acetate / Ma Xiaojian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 6 (11-12/2019)
[article]
Titre : Efficient removal of total nitrogen from tannery wastewater by promoting denitrification with sodium acetate Type de document : texte imprimé Auteurs : Ma Xiaojian, Auteur ; Zhou Jianfei, Auteur ; Zeng Yunhang, Auteur ; Bi Shi, Auteur Année de publication : 2019 Article en page(s) : p. 323-327 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acétate de sodium
Chlorures
Dénitrification
Eaux usées -- Analyse
Eaux usées -- Epuration
Eaux usées -- Teneur en azote totalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Total nitrogen (TN) in tannery wastewater is difficult to remove completely, because the low C/N ratio of the wastewater leads to inadequate denitrification. Sodium acetate was used as an extra carbon source to improve the denitrification efficiency and the TN removal. The appropriate COD/TN ratio for denitrification using sodium acetate was 5.1, at which the TN concentration of tannery wastewater decreased by 95%. A much faster removal of TN was obtained by adding sodium acetate in denitrification than by adding common glucose. These results showed that sodium acetate was a high-quality carbon source for a complete and rapid denitrification of tannery wastewater. The denitrification efficiency decreased with decreasing temperature and increasing chloride concentration. However, when the carbon source was made sufficient by adding sodium acetate, complete denitrification was stil) obtained even at 15°C or 10000mg/L of chloride concentration. Note de contenu : - MATERIALS AND METHODS : Materials - Effect of temperature on anaerobic denitrification of wastewater - Effect of chloride concentration on anaerobic denitrification of wastewater - Analytical methods of pollution loads in wastewater
- RESULTS AND DISCUSSION : Effect of addition of sodium acetate on anaerobic denitrification of tannery wastewater - Effect of temperature on anaerobic denitrification of tannery wastewater - Effect of chloride concentration on anaerobic denitrification of tannery wastewaterEn ligne : https://drive.google.com/file/d/1FUylPZ3JvBdPyCNZe4mIZkDmr_wPe0I3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33211
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 6 (11-12/2019) . - p. 323-327[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21314 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical method for quantitative determination of trace amounts of disperse dye in wastewater / Daniela P. Santos in COLORATION TECHNOLOGY, Vol. 130, N° 1 (02/2014)
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Titre : Electrochemical method for quantitative determination of trace amounts of disperse dye in wastewater Type de document : texte imprimé Auteurs : Daniela P. Santos, Auteur ; Magno A. G. Trindade, Auteur ; Ricardo A. G. Oliveira, Auteur ; Marly E. Osugi, Auteur ; Alex R. Bianchi, Auteur ; Maria V. B. Zanoni, Auteur Année de publication : 2014 Article en page(s) : p. 43-47 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse électrochimique
Analyse quantitative (chimie)
Colorants
Diméthylformamide
Eaux usées -- Analyse
VoltampérométrieIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The electrochemical behaviour of Disperse Red 13 dye at a glassy carbon electrode was investigated in both organic and aqueous organic mixtures. Best results were obtained in N,N-dimethylformamide/Britton–Robinson buffer (1:1, v/v), which displays a well-defined peak at -0.40 V (vs Ag/AgCl) owing to reduction of the protonated nitro group. This method can be successfully applied to the electroanalytical determination of Disperse Red 13 in a very simple and inexpensive way. All the differential pulse voltammetry parameters were optimised by using a glassy carbon electrode modified with poly(glutamic acid) films. The targeted analytical method presented a linear response from Disperse Red 13 concentrations between 2.5 × 10?7 and 3 × 10?6 mol l?1 (r = 0.997), with a detection limit of 1.5 × 10?8 mol l?1 and recoveries of 89.7–95.10% in water samples. Disperse Red 13 was successfully determined in textile industry wastewater by means of the proposed method after pre-extraction in a solid-phase extraction cartridge. Note de contenu : - EXPERIMENTAL : Apparatus - Preparation of the modified glassy carbon electrode - Analysis of disperse red 13 in wastewater
- RESULTS AND DISCUSSION : Electrochemical reduction of disperse red 13 - Disperse red 13 electrochemical detection at a poly(glutamic acid) modified glassy carbon electrode - Analytical applicationDOI : 10.1111/cote.12059 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12059 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20358
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Code-barres Cote Support Localisation Section Disponibilité 15937 - Périodique Bibliothèque principale Documentaires Disponible Evaluation de la charge polluante des eaux résiduaires / Hélène Sanejouand / 1980
Titre : Evaluation de la charge polluante des eaux résiduaires Type de document : texte imprimé Auteurs : Hélène Sanejouand, Auteur Année de publication : 1980 Importance : 72 p. Présentation : ill. Format : 30 cm Note générale : Bibliogr. Langues : Français (fre) Catégories : Eau -- Aspect de l'environnement
Eaux usées -- AnalyseIndex. décimale : 628.16 Analyse, traitement, pollution Note de contenu : - METHODES PHYSICO-CHIMIQUE : Détermination du pH - Résidu sec - Matières en suspension - Matières en solution - Matières décantables - Indice de Molhman - Température - Turbidité - Mesure de la couleur - Salinité
- METHODES CHIMIQUES : Oxygène dissous - Demande chimique en oxygène (D.C.O.) - Carbone - Azote - Substances extractibles au chloroforme - Calcium - Sulfure - Chrome - Chlorures - PhénolsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2052 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 2302 628.16 SAN Monographie Bibliothèque principale Documentaires Disponible Evaluation of chemical products in leather post-tanning process and their influence in presence of neutral salts in raw tannery effluent / M. V. Moreira in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 4 (04/2019)
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PermalinkA fast method to determine formaldehyde in leather wastewater / Yuan Dong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 3 (05-06/2010)
PermalinkFlow injection spectrophotometric determination of proteins in tannery effluents / Yu Lan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
PermalinkGuar gum as an environment-friendly thickening agent in reactive printing / S. Sostar in LES CAHIERS DE RHEOLOGIE, Vol. XVI, N° 1 (10/1998)
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PermalinkInteraction of aldehyde developed from amino acids of tannerry waste in a lower-vegetable tannage an eco-friendly approach - Part 2 / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 6 (11-12/2005)
PermalinkMetal-free combination tanning with replenishable polyphenols and marine oil / Victor John Sundar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 9 (09/2021)
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