Acrylic/keratin composite of enhanced dyeability towards cationic and anionic dyes / Lamiaa El-Gabry in COLORATION TECHNOLOGY, Vol. 132, N° 1 (02/2016)

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 1 (02/2016) . - p. 83-91 Titre : Acrylic/keratin composite of enhanced dyeability towards cationic and anionic dyes Type de document : texte imprimé Auteurs : Lamiaa El-Gabry, Auteur ; Amira Abou El-Kheir, Auteur Année de publication : 2016 Article en page(s) : p. 83-91 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants acides Colorants cationiques Colorants réactifs Couches minces Déchets industriels -- Recyclage Dissolution (chimie) kératines La kératine est une protéine, synthétisée et utilisée par de nombreux êtres vivants comme élément de structure, et également l'exemple-type de protéine fibreuse. La kératine est insoluble, et peut être retrouvée sur l'épiderme de certains animaux, notamment les mammifères, ce qui leur garantit une peau imperméable. Parfois, lors d'une friction trop importante, la kératine se développe à la surface de la peau formant une callosité. Les cellules qui produisent la kératine meurent et sont remplacées continuellement. Les morceaux de kératine qui restent emprisonnés dans les cheveux sont couramment appelés des pellicules. La molécule de kératine est hélicoïdale et fibreuse, elle s'enroule autour d'autres molécules de kératine pour former des filaments intermédiaires. Ces protéines contiennent un haut taux d'acides aminés à base de soufre, principalement la cystéine, qui forment un pont disulfure entre les molécules, conférant sa rigidité à l'ensemble. La chevelure humaine est constituée à 14 % de cystéine. Il y a deux principales formes de kératines : l'alpha-kératine, ou α-keratin, présente chez les mammifères notamment, dont l'humain, et la bêta-kératine, ou β-keratin, que l'on retrouve chez les reptiles et les oiseaux. Ces deux types de kératines ne présentent clairement pas d'homologie de séquence. Chez l'être humain, la kératine est fabriquée par les kératinocytes, cellules se trouvant dans la couche profonde de l'épiderme. Les kératinocytes absorbent la mélanine (pigment fabriqué par les mélanocytes), se colorent et ainsi cette pigmentation de l'épiderme permet de protéger les kératinocytes des rayons ultraviolets du Soleil. (Wikipedia) Polyacryliques Poudres Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Acrylic and keratin industrial wastes were dissolved, each separately, in their respective proper solvents. The soluble keratin was regenerated into powder and then mixed with the soluble acrylic to form an acrylic/keratin composite that was finally cast into film. The topography of the acrylic/keratin film was studied using scanning electron microscopy. The chemical composition of the obtained film was assigned using elemental analysis and infrared spectroscopy. The substantivity of the prepared acrylic/keratin film towards anionic (acid and reactive) and cationic (basic) dyes was studied. The obtained film exhibited high dyeability towards both acid and reactive dyes even at relatively low dyeing temperatures. Hydrazine hydrate was used to enhance the dyeability of the said film with acid and reactive dyes. Kinetic studies of the dyeing of the film with anionic dyes were also conducted. Note de contenu : - EXPERIMENTAL : Materials - Chemicals - Dyestuff - Method - Dyeing process - Analysis and testing - RESULTS AND DISCUSSION : Surface morphology - Dyeing - Kinetic study - Infrared spectroscopy - Elemental analysis DOI : 10.1111/cote.12190 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25579 [article]

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Adhesive properties of an epoxy resin bonding agent modified with waste granite powder / Lukasz Kampa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1303-1316 Titre : Adhesive properties of an epoxy resin bonding agent modified with waste granite powder Type de document : texte imprimé Auteurs : Lukasz Kampa, Auteur ; Agnieszka Chowaniec, Auteur ; Aleksandra Krolicka, Auteur ; Lukasz Sadowski, Auteur Année de publication : 2022 Article en page(s) : p. 1303-1316 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie analytique Déchets industriels -- Recyclage Epoxydes Essais d'adhésion Granite Liaisons chimiques Liants Poudres Résistance à l'arrachement Revêtements de sols Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The article presents the adhesive properties of a new binder based on epoxy resin with the addition of waste granite powder. The binder was modified with granite powder in amounts ranging from 10% to 60% in relation to the weight of the resin. Moreover, a coating was made without the addition of the granite powder in order to compare the obtained results. Previously obtained pull-off test results were also analyzed. The obtained results confirmed that the optimal material solution includes 10% or 20% of granite powder by weight. Additionally, chemical and microstructural analysis was also performed for both the reference sample and the sample modified with 20% of granite powder. The article also presents an explanation of the reasons for such an improvement of pull-off strength, which is based on careful analysis of the adhesive properties of the epoxy resin bonding agent modified with waste granite powder. Moreover, it explains how granite powder particles penetrate into the near-surface layer of the substrate, examines the porosity of the near-surface layer of the substrate using microstructural analysis, and presents the effect of adding waste granite powder to the epoxy resin bonding agent on the chemical properties of the near-surface layer of the substrate. Note de contenu : - MATERIALS AND METHODS : Concrete substrate - Granite powder - Epoxy resin bonding agent - Preparation of the samples - Pull-off strength test - SEM chemical and microstructural analysi - RESULTS : Pull-off strength of the epoxy resin bonding agent - Comparison of the obtained results with other known works - SEM chemical and microstructural analysis - Table 1 : The share of the individual sizes of the aggregate grains that were used to make the concrete substrate - Table 2 : The results of the chemical analysis of the granite powder used for the epoxy resin bonding agent - Table 3 : List of selected modified epoxy coatings DOI : https://doi.org/10.1007/s11998-022-00620-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00620-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38271 [article]

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Alternative uses for tannery wastes : a review of environmental, sustainability, and science / Cesar Vinicius Toniciolli Rigueto in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 20 p. Titre : Alternative uses for tannery wastes : a review of environmental, sustainability, and science Type de document : texte imprimé Auteurs : Cesar Vinicius Toniciolli Rigueto, Auteur ; Marieli Rosseto, Auteur ; Daniela Dal Castel Krein, Auteur ; Bruna Elisangela Pessini Ostwald, Auteur ; Lillian Avila Massuda, Auteur ; Bárbara Belém Zanella, Auteur ; Aline Dettmer, Auteur Année de publication : 2020 Article en page(s) : 20 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Biocarburants Biogaz Biopolymères Carburants diésel Cuirs et peaux -- Industrie -- Aspect de l'environnement Déchets industriels -- Recyclage Tannage -- Déchets Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The manufacture of leather covers a wide productive chain and beyond contributes to the economic flow. The various stages of leather processing result in high volumes of solid waste. In Brazil, a daily generation of 375 tons of solid waste is estimated, and landfills are still the most used route to its destination. In this review, emphasis will be given to researches that have sought alternatives for the use of solid waste from the tannery industry. Among the main applications of solid tannery wastes, the following stand out production of adsorbent materials, biodiesel, biogas, biopolymers, applications in agriculture and other applications involving extraction/recovery of compounds of industrial/commercial interest, isolation of microorganisms and production of enzymes and applications in the animal diet. In each alternative of waste application, the technologies used, the opportunities, and the challenges faced are mentioned. We hope that this review can provide valuable information to promote the broad understanding of the possibilities that tannery solid wastes has for the development of biodegradable and agricultural products, wastewater treatment, extraction of compounds of industrial and commercial interest, among others. Note de contenu : - METHODOLOGY - MAIN APPLICATIONS STUDIED FOR TANNERY WASTES : Adsorption - Biodiesel - Biogas - Biopolymers - Agriculture - Other applications - Table 1 : Studies that used tannery wastes from various stages of leather processing as an adsorbent material - Table 2 : Main fatty acids present in the fat extracted from tannery wastes - Table 3 : Comparison of studies involving biodiesel from tannery waste, petro-diesel, and B100 - Table 4 : Biodiesel characteristics in different world regulations - Table 5 : Pretreatments to increase biogas production - Table 6 : Main parameter analyzed to obtain biogas DOI : https://doi.org/10.1186/s42825-020-00034-z En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00034-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37454 [article]

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Anaerobic digestion of animal glue industry solid wastes / S. Pulavendran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 2 (03-04/2005) . - p. 67-70 Titre : Anaerobic digestion of animal glue industry solid wastes Type de document : texte imprimé Auteurs : S. Pulavendran, Auteur ; R. Ganesh, Auteur ; A. Thangamani, Auteur ; K. Thirumaran, Auteur ; R. A. Ramanujam, Auteur Année de publication : 2005 Article en page(s) : p. 67-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs d'origines animales Bio-méthanisation Biogaz Déchets industriels -- Recyclage Déchets organiques -- Recyclage Digestion anaérobie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Anaerobic digestion of animal glue industry solid wastes (AGISW) (residues from neutralised fleshings after glue extraction) was studied in a semi-continuous bench scale digester in order to determine the extent of the conversion into biogas. The Carbon/Nitrogen (C/N) ratio of AGISW is nearly 6.0. Solid wastes and wastewater from a local glue manufacturer were used as substrate for the anaerobic digestion. The study used a bench scale digester with a working volume of 6.5 litres operating at ambient temperature (28 ± 2°C). A hydraulic retention time (HRT) of 40 days and an Organic Loading Rate (OLR) of 3 ± 0.2 g /l. d were maintained during the study period. The study showed that 65 % of the volatile solids was destroyed. The average specific gas productions were 0.28 l /g of volatile solid added and 0.48 l/g of volatile solid removed. (Volatile solids are determined by ignition at 550°C and are a measure of the organic matter present in the waste - mainly denatured lipids and proteins). The values of specific gas production and percentage Volatile Solids (VS) destruction are in agreement with those for industrial and agro industrial wastes reported in the literature. The results revealed an interesting fact that, anaerobic digestion of AGISW could be operated at high Volatile Fatty Acids (VFA) concentration without affecting gas production. Anaerobic digestion of AGISW was studied for the first time with a view to managing solid wastes in an ecofriendly manner. The authors are of the view that this maiden attempt would help the industry manufacturing animal glue to use biogas from its waste resource as fuel. Note de contenu : - Feed preparation - Experimental set-up - Digester start-up and operation - Analytical techniques - Table 1 : Parameters of the waste characteristics before and after anaerobic digestion En ligne : https://drive.google.com/file/d/1G5zrUHWHz-UPljLvB1vhNFcW3jqzNt4C/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39596 [article]

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Biodegradation of leather solid waste and manipulation of methanogens and chromium-resistant microorganisms / Caroline Borges Agustini in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 1 (01/2017) . - p. 7-15 Titre : Biodegradation of leather solid waste and manipulation of methanogens and chromium-resistant microorganisms Type de document : texte imprimé Auteurs : Caroline Borges Agustini, Auteur ; Wolmir Lourenço Neto, Auteur ; Guilherme P. S. Priebe, Auteur ; Marisa Costa, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 7-15 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biogaz Cuirs et peaux -- Biodégradation Cuirs et peaux -- Déchets -- Recyclage Déchets -- Valorisation Déchets industriels -- Recyclage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The final solid wastes generated by tanneries are usually separately disposed of in hazardous industrial landfills, which are characterized as places of waste confinement where the residues undergo undesired and uncontrolled biological treatment. The storage and corresponding evolution of the sludge has not yet focalized the attention of the scientific community. Apart from developing knowledge of the ecology and function of the microbial community in anaerobic digestion processes, it is necessary to control this biological process. The manipulation of strict anaerobic microorganisms is the limiting factor in their isolation due to their high sensitivity to oxygen; therefore, cultivation under anaerobic conditions is essential. This work presents an evaluation of biogas generation and quality. In addition, microbial biodegradation is carried out in bench bioreactors containing two main solid wastes from tanneries: wet-blue shavings and sludge from a tannery wastewater treatment plant (WWTP). We analyzed two storage conditions of the sludge: storage under ambient conditions and under refrigeration. Sludge kept at ambient conditions showed a significantly higher methane production; methane was only detected in vials containing high concentrations of microorganisms. The manipulation of microorganisms did not interrupt biodegradation. The isolation technique with vials proved to be appropriate for the quantification of methanogenic microorganisms in biodegradation tests, although it was not fully elucidated for their isolation. Note de contenu : - MATERIALS AND METHODS : Bioreactor assembling - Biogas composition monitoring - Statistical analysis - Microbial collection and analysis - RESULTS AND DISCUSSION : Biogas and methane production - Statistical results - Microbiological results En ligne : https://drive.google.com/file/d/1sceXbIkeqzbHiY58k_0kIs9K846GK9kC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27564 [article]

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Champion of the green economy / Isabella Griffiths in INTERNATIONAL LEATHER MAKER (ILM), N° 39 (01-02/2020)  

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Changement climatique et développement in GALVANO ORGANO, N° 841 (10/2015)

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Chrome adsorption characteristics of Yue village soil fertilized with tannery sludge / Ding Shaolan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 4 (07-08/2014)  

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Circular flows / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 50 (11-12/2021)  

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Collagen recovered, purified and enzymatically hydrolysed from tannery waste / M. E. Errasti in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 1 (01-02/2024)  

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Les déchets industriels triés sont valorisés / Maud Micollet in GALVANO ORGANO, N° 836 (03/2015)

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Factors influencing chromium recovery from chromium sulphate tanned leather scrap ashes / S. Carneiro in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 1 (01-02/2003)  

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Fungal biotransformation of bovine hair : Assessment of structural changes / B. C. Galarza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)  

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Heat dissolves coating / Carsten Zollitsch in INTERNATIONAL SURFACE TECHNOLOGY (IST), N° 2/2008 (2008)

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Interaction of aldehyde developed from amino acids of tannery waste in a lower - chrome tannage an eco-friendly approach / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)  

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Investigation into the removal of pigment, sulphur and vat colourants from cotton textiles and implications for waste cellulosic recycling / Pendo Bigambo in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)  

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Lack of inhibitory effect of chromium on anaerobic co-digestion of tannery solid wastes / Caroline Borges Agustini in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)  

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Lignin based colorant : modified black liquor for leather surface coating application / P. Balasubramanian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 10 (10/2018)  

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Meeting the challenges for lighter cars with innovative products / Denis Granger in JEC COMPOSITES MAGAZINE, N° 95 (03/2015)  

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Microbial keratinase and its potential application in th management of tannery hair waste / Arthur Onyuka in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 12 (12/2014)  

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