An integrated approach for the treatment of vegetable tannins wastewaters / Balaraman Madhan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 1 (01-02/2005) . - p. 9-14 Titre : An integrated approach for the treatment of vegetable tannins wastewaters Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; Kalarical Janardhanan Sreeram, Auteur ; A. Sharli, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2005 Article en page(s) : p. 9-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants Eaux usées -- Décontamination Eaux usées -- Epuration Potentiel zeta Précipitation (chimie) Sulfate de zinc Tanins végétaux Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Intensive leather making techniques in an eco-sensitive world have increased the attraction of a tanning system based on natural products such as plant polyphenolics. However, there is also a distinct disadvantage in the usage of such materials because of the high organic loading of the effluent which is also difficult to degrade due to the high oxygen demand. We have examined the treatment of vegetable tannery effluents aiming at the reduction of the pollution load. Two methods have been evaluated, one based on precipitation of tannins as zinc-tannate and another with oxidative degradation after precipitation. In the precipitation method, 0.5% wattle solution at pH10 is precipitated as zinc-tannate giving a 73% reduction in COD. A further reduction of the chemical oxygen demand by 97% has been obtained with the two-stage approach of precipitation followed by oxidative degradation in the presence of an immobilized iron catalyst. This integrated approach provides a viable solution to the problem of vegetable tannins in wastewaters. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Zeta potential measurements - Precipitation treatment - Two-step treatment - Treatment of industrial samples - RESULTS AND DISCUSSION : Treatment by precipitation method - Two-step treatment - Treatment of commercial vegetable tannin wastewater - Commercial scale treatment - Table 1 : Effect of pH on COD reduction of vegetable tannin solution - Table 2 : % Reduction of COD on precipitation of vegetable tannins with different amounts of zinc sulphate - Table 3 : COD of 0.5% wattle solution before and after treatment - Table 4 : COD of the commercial vegetable tannery wastewater before and after treatment En ligne : https://drive.google.com/file/d/1acFfI8-TAPuL5jjhh6K6TocBI1xyk5b6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39608 [article]

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Biodegradation by filamentous fungi of vegetable tannins used in the tanning industry / Franciela Spier in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 2 (03-04/2018) . - p. 59-63 Titre : Biodegradation by filamentous fungi of vegetable tannins used in the tanning industry Type de document : texte imprimé Auteurs : Franciela Spier, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2018 Article en page(s) : p. 59-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants Aspergillus Biodégradation Champignons microscopiques Pénicilliums Tanins végétaux Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery waste is complex and may, in some cases, be toxic to plants, animals and micro-organisms. This study aimed to evaluate the biodegradability of vegetable tannins used in the tanning industry by filamentous fungi. We evaluated the influence of the concentration of tannin, the forms of culture and the type of tannin used in the cultivation of Aspergillus niger. No differences were observed between the concentrations and the forms of cultivation. However, the type of tannin used influenced the consumption reaching 15% for a condensed tannin and only 7% for the hydrolysable. The results of the tests carried out proved the fungistatic action of the phenolic compounds present in the tannins on Aspergillus niger. With the new fungal strains, the fungi named Pe G8 showed to be more efficient in the biodegradation of tannins reaching 97.3% of the consumption of acacia tannin. The expressive results obtained from the consumption of acacia condensed tannin by the fungi of the genus Penicillium have demonstrated that the biodegradation of condensed tannins by filamentous fungi may be the promising alternative treatment with the potential to minimise tannery waste. Note de contenu : - Micro-organism - Submerged culture fermentation - Solid state fermentation - Analytical methods En ligne : https://drive.google.com/file/d/1QyZZtsfJf-3bYaJfRcGi1z2TqH2YxIjK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30557 [article]

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A collagen alternative from acacia trees / Bernd Walzel in GLOBAL PERSONAL CARE, Vol. 23, N° 4 (04/2022)  

[article]  inGLOBAL PERSONAL CARE > Vol. 23, N° 4 (04/2022) . - p. 83-85 Titre : A collagen alternative from acacia trees Type de document : texte imprimé Auteurs : Bernd Walzel, Auteur ; Anja Herrmann, Auteur ; Beatrix Senti, Auteur ; Tamina Shah, Auteur ; Stefan Bänziger, Auteur Année de publication : 2022 Article en page(s) : p. 83-85 Langues : Anglais (eng) Catégories : Acacia et constituants Antiâge Cosmétiques Peau -- Soins et hygiène Index. décimale : 668.5 Parfums et cosmétiques Résumé : PhytoCollagen is a unique plant-derived collagen alternative sourced from the acacia tree, which combines the cosmetic benefits of collagen with a green, sustainable source and matches consumer preferences. In vivo studies confirm that it entirely mimics the cosmetic benefits of animal collagen. This makes it an ideal replacement - a truly plant-derived, sustainable, green, vegan alternative to animal collagen. Note de contenu : - Acacia tree alternative - Consumer survey - In vivo activity En ligne : https://drive.google.com/file/d/1yIeLALUWeSWs6G9Yi-ScskAeotvVedQ0/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37416 [article]

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Combination tanning system for manufacture of shoe upper leathers : cleaner tanning process / A. E. Musa in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 6 (11-12/2012)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 6 (11-12/2012) . - p. 239-245 Titre : Combination tanning system for manufacture of shoe upper leathers : cleaner tanning process Type de document : texte imprimé Auteurs : A. E. Musa, Auteur ; G. A. Gasmelseed, Auteur Année de publication : 2012 Article en page(s) : p. 239-245 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants Chaussures Déchets -- Réduction Sulfate de tétrakis hydroxyméthyl phosphonium Le sulfate de tétrakis hydroxyméthyl phosphonium est un myxobactéricide qui offre une prévention efficace contre les biofilms microbiens dans les eaux de traitement, et ce, pour une vaste gamme de micro-organismes formant des biofilms. Le sulfate de tétrakis (hydroxyméthyl) phosphonium agit principalement en augmentant la perméabilité de la membrane externe de l'enveloppe de la cellule microbienne, ce qui entraîne la libération rapide de protéines et d'autres substances cellulaires par les cellules. En outre, le sulfate de tétrakis (hydroxyméthyl) phosphonium inhibe le processus de sulfatoréduction dans les bactéries réductrices de sulfate. Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Tannage végétal Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nowadays people are seeking natural products, and advocating the preparation of leather products from green chemicals. Therefore, it becomes an important task of chemists in leather manufacture to research and develop clean and green tanning agents to replace chromium-containing tanning agents. In this study, a combination tanning process based on garad powder (Acacia nilotica sub. sp. nilotica) and tetrakis hydroxymethyl phosphonium sulphate (THPS) for the production of upper leathers is presented as a cleaner alternative. Two tanning methods, garad followed by THPS (garad-THPS) and THPS followed by garad (THPS-garad), have been tried. The combination tannage, employing 20% garad powder and 1.5% THPS results in leathers with shrinkage temperatures of 100°C. The change in the order of addition of gard and THPS showed a marginal difference in thermal stability, but significant variations were observed in the physical characteristics of leathers. The combination tanning system provides a significant reduction in the discharge of total dissolved solids in the wastewater. The characteristics of the leathers indicate that the garad-THPS combination tanning system provided leathers with good organoleptic properties and comparable strength properties. The leathers were further characterized by chemical analysis. The work presented in this paper establishes the use of garad and THPS as an effective alternative cleaner tanning method. Note de contenu : - Materials - Garad-THPS combination tannage - Measurement of hydrothermal stability of leathers - Handle and appearance of the crust leather - Physical testing - Analysis of spent liquors from tanning trials - APPENDIX : data concerning author's comment on toxicity of chromium - Toxicity of Cr(III) reference - Analysis of exhaustion of tanning spent liquors - Safe disposal method for chrome leathers - Possible risks of THPS exposure - Chemical analysis En ligne : https://drive.google.com/file/d/1ANwnCAjinHnBByzF5RxC4vYLp57WVhEW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16803 [article]

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Comparative tanning ability of extracts from four north american species of acacia / David. S. Seigler in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIV (Année 1989) . - p. 315-322 Titre : Comparative tanning ability of extracts from four north american species of acacia Type de document : texte imprimé Auteurs : David. S. Seigler, Auteur ; Juan F. Hernandez, Auteur Année de publication : 1989 Article en page(s) : p. 315-322 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acacia et constituants Etudes comparatives Tannage végétal Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The percentages of tannins in four common Acacia species, A. berlandieri, A. farnesiana, A. greggii, and A. rigula and the efficacy of these tannins for the production of leather have been determined. Tannins were extracted with 70% acetone-water. Hide samples were treated in the conventional manner and suspended in tannin solutions. Tannins from A. farnesiana, A. berlandieri and A. rigidula penetrated the hide in 9 days and grave acceptable color. The yields of leather were best for A. rigidula and A. greggii. Water-soluble portions of the aqueous-acetone extracts of wattle. Tannins from A. greggii occur in too small amounts to be useful and have some undesirable properties. Because of the widespread distribution and abundance of these plants, they may have potential as sources for commercial tannins. Note de contenu : - EXPERIMENTAL : Plant materials - Extraction of bulk collections - Solubilization of the insoluble fractions - Determination of tannin content and other parameters - Tanning of hide samples En ligne : https://drive.google.com/file/d/1ehdoJhpP4rYFy_mhBVqFTeke5b_ch0Db/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17369 [article]

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Development of natural colours in Cr-Fe tanned garment leathers / J. R. Rao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)  

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Development of natural garment leathers : a metal-free approach / Kalarical Janardhanan Sreeram in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 12 (12/2010)  

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Evaluation of potential application for sunt pod extracts (Acacia nilotica) in leather tanning / A. I. Nasr in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)  

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High exhaust tanning systems using a novel cross-linking agent (CA) / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 3 (05-06/2006)  

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Interaction 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)  

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Molecular weights and tanning properties of tannin fractions from acacia mangium bark / Teng Bo in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 5 (09-10/2013)  

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Natural approach to improving light fastness of a leather dyed with a microbial colorant / Pandey Sudha in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 9 (09/2016)  

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Physical and fastness properties of leather dyed with a natural dye extracted from beetroot peels using a biomordant / Louret A. Andalo in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 6 (11-12/2023)  

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Phytochemical screening and determination of tannin content of compounds from acacia xanthophloea as viable tanning agents for the leather industry / Michael Cheloti in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 5 (09-10/2022)  

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Polyphenols of acacia arabica pods / A. J. Goodwin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)  

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Remediation of spent vegetable tannins from waste tanning liquor through coagulation and ultrasound pre-treatment : a sustainable approach / Resmi Mohan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 9 (09/2022)  

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Removal of Erioglaucine (Acid Blue 9) with a new coagulant agent from Acacia mearnsii tannin extract / Jesùs Sànchez Martin in COLORATION TECHNOLOGY, Vol. 128, N° 1 (2012)  

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Resistance of the Nile Tilapia (Oreochromis niloticus) tanned with vegetable tanning / D. H. Fockink in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)  

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Structural differences between commercial acacia mangium tannin and its effluent / Teng Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 3 (03/2016)  

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Studies on the use of enzymes in tanning process : Part II. Kinetics of vegetable tanning process / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 1 (01/2010)  

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