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675.2 : Préparation du cuir naturel. Tannage |
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Are carcinogens a chronic health hazard in the tannery workplace ? / Robert M. Lollar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXV (Année 1980)
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Titre : Are carcinogens a chronic health hazard in the tannery workplace ? Type de document : texte imprimé Auteurs : Robert M. Lollar, Auteur Année de publication : 1980 Article en page(s) : p. 510-525 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Three clinical studies have associated employment in the leather and leather products industries with cancer, but they have not identified tanning and finishing operations specifically. The dust that is characteristically created in the manufacture of leather goods is most often suggested as a significant factor. However, many of the chemicals used in the leather tanning industry are classified as carcinogenic. An analysis of the potential risks of exposure to these chemicals is presented in this paper, along with suggestions for proper practices of handling them. The classes of materials are nitrosamines, benzidine-based direct dyestuffs, chromate pigments, aromatic organic solvents, and tannins. Note de contenu : - NATIONAL OCCUPATIONAL HEALTH SURVEY
- CASE HISTORY STUDIES
- CHEMICAL CARCINOGENS : Nitrosamines - Benzidine-based dyestuffs - Chromate pigments - Aromatic organic solvents - TanninEn ligne : https://drive.google.com/file/d/1rW-iHqgra-wOKqAxOeYeaaVtaA_wTjeA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17802
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXV (Année 1980) . - p. 510-525[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008513 - Périodique Archives Documentaires Exclu du prêt Assessment of vegetable tannin extracts by colorimetry / Timothy D. Stilwell in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 6 (06/2001)
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Titre : Assessment of vegetable tannin extracts by colorimetry Type de document : texte imprimé Auteurs : Timothy D. Stilwell, Auteur ; Bruce W. Buehrig, Auteur ; Robert J. Harvey, Auteur ; L. Shepley Hermann, Auteur ; Jean J. Tancous, Auteur Année de publication : 2001 Article en page(s) : p. 192-204 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Spray-dried, untreated wattle and treated quebracho extracts were tested for color by four laboratories equipped with Lovibond Tintometers. A comparison of color readings was conducted at the U.S.H.S.L.A. Laboratory where more reasonably priced meters, a Jenway Colorimeter and a Milton-Roy Spectrophotometer, were used. Time for testing was shortened considerably because preliminary tannin analyses were not done and the meters were simpler to operate. Samples of extracts were weighed, dissolved in distilled water, heated to 82oC, cooled and read immediately. A ratio, constructed by dividing yellow readings by red readings, was found to be a valuable method for understanding factors that influence color such as pH and addition of reagents. En ligne : https://drive.google.com/file/d/149LW5NP9yrPYRBQMilRHVQ4FIsZpsm8H/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4371
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 6 (06/2001) . - p. 192-204[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001564 - Périodique Bibliothèque principale Documentaires Disponible Assessment of water management in tanneries / Patrice Monteiro de Aquim in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)
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Titre : Assessment of water management in tanneries Type de document : texte imprimé Auteurs : Patrice Monteiro de Aquim, Auteur ; Mariliz Gutterres, Auteur ; Jorge Trierweiler, Auteur Année de publication : 2010 Article en page(s) : p. 253-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Analyse
Gestion des ressources en eau
Tannage
Tannage -- Aspect de l'environnementIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Assessment of water management in tanneries --- This study evaluates the use of water in processing hides into leather. It investigates the environmental impact on water resources of tanneries in Rio Grande do Sul State, evaluating the water demand and concentrations of certain chemicals in the wastewater discharged from the beamhouse, tanning and retanning processes of this industry.
A questionnaire was formulated which was intended to identify water management problems in tanneries, and the possible alternatives available to tanneries aiming at their improvement. A simple and objective application called IRGO (insufficient, regular, good and optimal was developed. The IRGO was applied to 10 tanneries. After completing the questionnaire, the tanneries could check how removed they are from an ideal tannery and ascertain which actions must be taken to improve their performance.
The results showed that there is a large demand for water in the process and little water is re-used. The most conventional liming process employs sulphide, lime and amine and recycling is already applied to this operation in the state. The steps of washing, deliming and the float itself use large quantities of water, although the majority of the tanneries do not use ammonia in deliming. The tanning procedure most used employs chrome III without recycling. In relation to retanning, studies need to be carried out aiming to increase the efficiency of the absorption of chemicals. The wastewater treatment plants are satisfactory due to the requirements of the environmental organizations.En ligne : https://drive.google.com/file/d/1FfVgVeI6OIap-Jj61pjuYIU02rdssLx3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10811
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 6 (11-12/2010) . - p. 253-258[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012670 - Périodique Bibliothèque principale Documentaires Disponible Aswan clay as sorbent for removal of Cr(III) and Cr(VI) from synthetic solution and tannery wastewater / O. A. Mohamed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 5 (09-10/2005)
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Titre : Aswan clay as sorbent for removal of Cr(III) and Cr(VI) from synthetic solution and tannery wastewater Type de document : texte imprimé Auteurs : O. A. Mohamed, Auteur ; S. A. Sayed, Auteur ; H. S. Mohamady, Auteur ; N. H. El-Sayed, Auteur Année de publication : 2005 Article en page(s) : p. 204-209 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Adsorption
Argile
Caractérisation
Chrome trivalent -- Absorption
Déchets industriels -- Elimination
Eaux usées -- Epuration
Eaux usées -- Teneur en chrome trivalent
Isotherme d'adsorption
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The sorption on Aswan clay of Cr(III) and Cr(VI) from synthetic solution and tannery wastewater has been studied. The clay has been characterized and used for the removal of chrome. The adsorption was studied as a function of pH, contact time, adsorbate concentration, loading, temperature and interfering ions. The equilibrium data fitted well with a Freundlich adsorption isotherm, where the Kf and n values are 2.08 - 4.6 for Cr(VI), 14.45 - 2.5 for Cr(III) and 8.31 - 2.4 for tannery wastewater. In our study we choose Aswan clay, which is low in cost, to aid the economy of the process. Adsorption studies indicated that chrome removal is 77% for CrVI, 90% for CrIII and 75% for a tannery wastewater. Note de contenu : - MATERIALS AND METHODS : Adsorbents
- CHARACTERISTICS OF ASWAN CLAY : X-ray diffraction analysis - Adsorbates - Chemicals - Instrumentation - Methods
- RESULTS AND DISCUSSION : Effect of pH - Effect of agitation time - Effect of adsorbent loading - Effect of adsorbate concentration - Effect of temperature - Effect of some anions on chromium (VI) removal
- ADSORPTION ISOTHERMSEn ligne : https://drive.google.com/file/d/1TtT-yFTYThWUEKw5oSLffFro0XdfeHyr/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39231
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 5 (09-10/2005) . - p. 204-209[article]Augmentation of garment sheepskin type properties in goatskins : Role of chromium-silica tanning agent / N. N. Fathima in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 6 (11-12/2003)
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Titre : Augmentation of garment sheepskin type properties in goatskins : Role of chromium-silica tanning agent Type de document : texte imprimé Auteurs : N. N. Fathima, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2003 Article en page(s) : p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Analyse sensorielle
Chrome
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Douceur (toucher)
Liqueurs de tannage -- Analyse
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
Température de retrait
Vêtements en cuirIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The task of producing garment leathers from goatskins is challenging owing to the compactness of the corium and the roughness of the grain surface, thus, to achieve the characteristics of garment leathers made from hair sheepskins, the choice of tanning system is critical. Treatment with silicates produces leathers, which have good softness and fluffiness. Since silica does not give the desired shrinkage temperature; chromium has been incorporated in the tanning agent.
In this present study, a new chrome-silica tanning agent has been prepared to make garment leathers from goatskins with sheep-like characteristics. This tanning agent exhibits additional benefits because of its chrome saving approach. The percentage exhaustion of chrome is increased from a conventional 70 % to 90 % and analysis of spent tan liquor shows reduction in TDS and COD values. The leathers made with this tanning agent are soft, have smooth grain and fluffiness. A hairsheep-like character results from tanning goatskins with this new eco-friendly chrome-silica tanning agent.Note de contenu : - EXPERIMENTAL PROCEDURES :
- Materials
- Preparation of the chrome-silica tanning agent
- Tanning trials
- Control
- Post tanning
- EXAMINATION OF LEATHERS :
- Physical methods
- Organoleptic properties
- Objective assessment of softness
- Analysis of spent tan liquor
- Scanning Electron Microscopy examination
- RESULTS AND DISCUSSION
- Table 1 : Shrinkage temperature and spent tan liquor analysis
- Table 2 : Physical strength characteristics of leathersEn ligne : https://drive.google.com/file/d/1tAC-66rbByKxdjzz56aw7qJEJetO__ve/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39706
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 6 (11-12/2003) . - p.[article]Automatic control of recycling technology for chromium from liquid and solid tannery waste / Karel Kolomaznik in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 3 (03/2005)
PermalinkAutomatic on-line determination of trace chromium(VI) in chromium(III)-bearing samples by reverse adsorption process / Minghua Liu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 1 (01-02/2002)
PermalinkAuxiliary agents with non-swelling capacity used in pickling-tanning processes. Part 1 / Ramón Palop in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 4 (07-08/2002)
PermalinkAuxiliary agents with non-swelling capacity used in pickling-tanning processes. Part 2 / Ramón Palop in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 5 (09-10/2002)
PermalinkAuxiliary agents with non-swelling capacity used in pickling-tanning processes - Part 3 / Agusti Marsal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)
PermalinkAuxiliary agents with non-swelling capacity used in pickling-tanning processes - Part 4 / Agusti Marsal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
PermalinkAvoiding the production of polluting and toxic chemicals in the tanning process / Josep Maria Morera in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 10 (10/2021)
PermalinkBack to basics : A framework for leather manufacture / Richard Daniels / Liverpool [Royaume-Uni] : World Trades Publishing (2006)
PermalinkBase line : amphoteric implications / Olga Ballùs in LEATHER INTERNATIONAL, Vol. 217, N° 4861 (06/2016)
PermalinkBastin, un cuir couleur du temps / François Gaillard in LEATHER FASHION DESIGN (LFD), N° 1 (02/2019)
PermalinkBeamhouse and tanning operations : process chemistry revisited / T. Ramasami in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 83, N° 1 (01-02/1999)
PermalinkPermalinkA bio-driven lime and pickle free tanning paves way for freener garment leather production / Rathinam Aravindhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 2 (02/2004)
PermalinkPermalinkBio-oxidation of oil tanned leathers / K. Balajyothi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 5 (09-10/2008)
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