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The elimination of effluent from liming, acid/salt pickling and the chromium tanning processes / Richard Daniels in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 105-111 Titre : The elimination of effluent from liming, acid/salt pickling and the chromium tanning processes Type de document : texte imprimé Auteurs : Richard Daniels, Auteur ; Jiasheng Su, Auteur ; Falei Zhang, Auteur ; Zhuangdou Zhang, Auteur Année de publication : 2017 Article en page(s) : p. 105-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaulage Cuirs et peaux -- Industrie -- Aspect de l'environnement Déchets -- Réduction Déchets industriels -- Elimination Eau -- Consommation -- Réduction Eaux usées -- Epuration Picklage Le picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu. Produits chimiques -- Consommation -- Réduction Tannage Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : It is acknowledged that within the chemical processing of hides into chrome-tanned leather that the liming, acid pickle and the tanning processes are the major contributors of pollutants. This is in terms of biological load, suspended solids, sulfide, nitrogen, chromium, salinity and the resultant sludges for disposal. This loading includes unused chemicals that are discharged from these processes due to the poor process efficiencies. Many attempts have been made to lessen this waste at source, but technologies in common use have basically remained unchanged for decades. Solutions to these problems are for reaching, and the details set down in this paper describe a technology that addresses and resolves these matters. This information was compiled through independent on-site studies within three major tanneries, where approximately 60 000 wet-salted US, European and. Australien hides per week have been processed since 2013. Accordingly, this paper describes in detail this radical new approach to leather manufacture. The initial investigations and developments of this technology by BIOSK involved the building of a full scale wet-blue manufacturing plant, and five years of developments before introduction to industry. The practicality and value of this technology has since been verified by continuous full scale manufacture by tanners that commenced in 2011. The technology involves the complete retention and recycling of used floats from liming, pickle and tanning in self-contained loops, and eliminates associated washing cycles. This is the base for the complete uptake of processing chemicals, a significant reduction in water use, and zero effluent discharged from these ordinal rnanufacturing stages. Note de contenu : - METHODOLOGY : The technology for wet-blue manufacture from wet-salted hides - RESULTS AND DISCUSSION : Managing the technology - Managing the salinity within processing - Technical advantages - FIGURES : 1. The BIOSK development plant. Collection sumps for holding the various waste water discharges from wet-blue manufacture are shown in the foreground. In tanneries using the technology, floor-mounted holding tanks are used instead of sumps - 2. Swelling of a skin as a function of pH and repression by addition of salt - TABLES : 1. Tanneries as sources of information - 2. Hair-saving liming process : BIO-cycle technology. Material : wet-salted boving hides : USA, Australia, Europe - 3. Pickle, pre-annage and chromium tannage : BIO-cycle technology. Material : wet-salted bovine hides : USA, Australia, Europe - 4. Reductions in offers of chemicals and water (spreas of values from three tanneries) - Reductions in chemicals and water based on previous (conventional) processing (spread of values from three tanneries) En ligne : https://drive.google.com/file/d/1ZOQDWfbiT7QpAHyBGPtqoR7eSE_B4igs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28794 [article]

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Adsorption properties of acid dye on amine-terminated dendritic polymer / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 112-122 Titre : Adsorption properties of acid dye on amine-terminated dendritic polymer Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Zhao Jing, Auteur ; Bu Qiaoqiao, Auteur ; Ren Longfang, Auteur Année de publication : 2017 Article en page(s) : p. 112-122 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Colorants -- Adsorption Colorants acides Eaux usées -- Epuration Polymères -- Synthèse Polymères à terminaison amine Polymères dendritiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of amine-terminated dendritic polymers (ADPs) were synthesized by stepwise substitution reaction and were used as an adsorbent for removal of acid black dye NT from aqueous solution. Comparison experiments showed that the ADP-3 has good adsorption effect. Then, the effects of various parameters such as initial acid black dye NT concentration (50-300mg/L) and solution pH(1.5- 6.5) were investigated. The point of zero charge (PZC) of ADP-3 has been determined. Specific surface area and average adsorption pore size of the ADP-3 were 21.378m2/g and 3.833nm, respectively. Field scanning electron microscopy (FESEM) indicated that the adsorption material has porous structure, which provided favorable conditions for adsorption process. The experimental data were analyzed by Langmuir and Freundlich models of adsorption. Equilibrium data were fitted well with the Freundlich model. Thermodynamics parameters, ?G, ?H and ?S indicate that the adsorption of acid black dye NT onto ADPs were spontaneous and endothermic process in nature. Pseudo-first-order and pseudo-second-order kinetic models vvere used to fit the adsorption kinetic data. The adsorption kinetics was found to follow the pseudo-first-order kinetic model. Amino blocking indicated that the amine content plays an important role in the adsorption process. The adsorbent was also applied to the treatment of leather dye effluent, the results showed that ADP-3 exhibit a prominent adsorption property on leather dye effluent. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and instruments - Preparation of ADP - Contrast experiments - Characterisation of products - Adsorption experiments - Adsorption mechanism - Adsorption application in leather dye effluent - RESULTS AND DISCUSSION : Amino contents - Contrast experiments results - The point of zero charge (PZC) of ADP-3 - Instrument characterization - Adsorption experiment results - Adsorption kinetics - Adsorption mechanism - Adsorption application in leather dye effluent En ligne : https://drive.google.com/file/d/1Tixq7ruz2XOqaidv26cg77Xmq-D4t0cL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28795 [article]

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Biodegradation of wet-blue leather with different caldosporium species / Eser Eke Bayramoglu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 123-128 Titre : Biodegradation of wet-blue leather with different caldosporium species Type de document : texte imprimé Auteurs : Eser Eke Bayramoglu, Auteur ; Claudia Florio, Auteur ; Gianluigi Calvanese, Auteur Année de publication : 2017 Article en page(s) : p. 123-128 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Champignons microscopiques Cuirs et peaux -- Analyse Cuirs et peaux -- Biodégradation Cuirs et peaux de moutons Microscopie Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study includes eight months observation of different Cladosporium species ; C. cladosporioides, C. herbarum and C. oxysporum inoculated on the wet-blue sheep leather. It was identified that the Cladosporium types grew easily and mineralized (oxidized) the leather with their enzymes, despite the chrome III in the wet-blue. Eight mores later, as a result of the optical microscopy-stereoscopy - superficiel analyses, SEM Microscopy/Secondary Electron Detector deeper morphological analysis and SEM Microscopy/X-Ray probe - microanalysis, wet-blue infected with Cladosporium - showed a high amount of calcium sulfate and sodium chloride based crystal clusters. Our resuits indicated that of all the fungi species we studied, a cladosporioides most affected the structure of the wet-blue sheep leather and Cr(III) had no toxic effect for this fungi's genus for eight months. Note de contenu : - Materials and methods - Leather processing - Microbiological analyses - FIGURES : 1. Optical microscope anaysis of the control samples - 2. SEM analysis of the control samples - 3. OM analysis of the wet-blue infected by C. oxysporum (6x) and (40x) - 4. SEM analyses of wet-blue infected by C. oxysporum with grain damage - 5. OM analysis of the wet-blue infected by C. herbarum (6x) and (40x) - 6. SEM analysis of the wet-blues infected by C. herbarum - 7. OM analysis of the wet-blue infected by C. cladosporioides (6x) and (40x) - 8. SEM analysis of the wet-blue infected by C. cladosporioides - 9. SEM X-ray probe microanalysis - A : Crystalline deposits ; B. Leather grain damage - 10. SEM X-ray probe microanalysis of C. cladosporioides - 1 : Crystalline deposits ; 2 : Possible microbiological matter En ligne : https://drive.google.com/file/d/1gh9_fA9Stv3hyxVviYi5Vxr1ZEkLVy8w/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28796 [article]

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Medium optimisation for bioflocculant produced from bacillus cereus / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 129-134 Titre : Medium optimisation for bioflocculant produced from bacillus cereus Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Che Chun, Auteur ; Yang Qinhuan, Auteur Année de publication : 2017 Article en page(s) : p. 129-134 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux Eaux usées -- Epuration Floculant Floculation Sels Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper further investigated a previous study that discovered a strain of Bacillus camus with a flocculation effect. Based on the initial medium, single-factor experiments were carried out to optimise the carbon and nitrogen sources and their concentrations. Inorganic salts with differing concentrations were successively tested through single factor, orthogonal, and composite experiments, from which an optimal medium recipe was determined with the highest flocculation activity. Next, the flocculation activity and yield of the bioflocculant were compared between the optimal medium and the initial medium. The results showed that 40g/L mannitol was the optimal carbon source, and 4g/1._ peptone was the optimal nitrogen source, white 0.75g/L l<21-1PO4 was the highest amongst the inorganic salts. Considering the carbon sources, nitrogen sources, and inorganic salts, the optimal medium with the highest flocculation activity was 40g/L mannitol, 4g/L peptone, and 0.75g/L K2HPO4. It was found that the optimal medium increased the yiefd of the bioflocculant produced by Bacillus cereus by 189.70% and the flocculation activity by 58.87%, which was a significant improvement. These experimental results are of great importance in increasing the efficiency of wastewater treatment and reducing the cost of bioflocculant. Note de contenu : - MATERIALS AND METHODS : Experimental strains and media - Strain inoculation - Determination of flocculation - Single factor optimisation of carbon source - Single factor optimisation of the nitrogen source - Optimisation of inorganic salts - Comparison of the effects of the optimised and the initial medium - RESULTS AND DISCUSSION : Optimisation of carbon source - Optimisation of nitrogen source - Optimisation of inorganic salts - Comparison of the effects of the initial medium and the optimised medium En ligne : https://drive.google.com/file/d/1IYo2vy4BMYcJJGVtu2m_ZLhW1jwDa0yH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28797 [article]

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Removal of acid black 210 dye from leather dyeing effluent using spherical particles of P(HEMA-GMA)-IDA-Cr(III) hydrogel membrane / Safiye Meric Acikel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 135-142 Titre : Removal of acid black 210 dye from leather dyeing effluent using spherical particles of P(HEMA-GMA)-IDA-Cr(III) hydrogel membrane Type de document : texte imprimé Auteurs : Safiye Meric Acikel, Auteur ; R. H. Åženay, Auteur ; Sinan Akgöl, Auteur ; Ahmet Aslan, Auteur Année de publication : 2017 Article en page(s) : p. 135-142 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Bains de teinture -- Epuration Chrome trivalent Colorants acides Cuirs et peaux -- Teinture Déchets industriels -- Elimination Eaux usées -- Analyse Eaux usées -- Epuration hydrocolloïdes Membranes (technologie) Photoréticulation Polyméthacrylate d'hydroxyéthyle-co-glycidyl méthacrylate Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hydrogel membranes can swell by a high proportion of their weight and have a large surface area, and are nowadays preferred in adsorption studies. In this work, p(HEMA-GMA) poly(hydroxyethyl methacrylate-co-glycidyl methacrylate) spherical particulated hydrogel membrane (SPM) was produced by UV photopolymerization and the synthesized membrane was coupled with iminodiacetio acid (IDA) in order to bond the Cr(III) ions in the chrome tanning process effluent. Then p(HEMA-GMA)-IDA-Cr(III) SPM was used to remove Acid Black 210 dye from the dyeing process effluent. The membrane's chrome and dye adsorption capacities were determined using a UV/Vis Spectrophotometer at wavelengths of 601nm and 435nm respectively. After the membranes were used, the discharged tanning and dye process wastewaters were examined in order to see the differences in the wastewater in terms of COD, BOD, conductivity, pH, salinity, total dissolved solids, total suspended solids, potassium, total nitrogen and chromium content. The results showed that the metal-chelated p(HEMA-GMA)-IDA SPMs chelated chrome ions between 398.47 and 619.10mg/g, and the adsorbed Acid Black 210 dye molecules were between 0.76 and 1.87mg/g. In conclusion, p(HEMA-GMA)-1DA SPM is an effective sorbent system for removing Cr(III) ions and acid dye molecules from leather discharge waters. Note de contenu : - Characterisation of nano-PHEMA-AB - Adsorption of Cr(III) ions - Wastewater analysis of chrome tanning and dyeing effluents - FIGURES : 1. Treatment of chrome tanning wastewater with p(HEMA-GMA)-IDA hydrogel membrane - 2. Treatment of dyeing wastewater with p(HEMA-GMA)-IDA hydrogel membrane - 4. SEM photographs of (HEMA-GMA) (at a scale of 1mm and 50mm) - 4. SEM photographs of p(HEMA-GMA) (at a scale of 1mm and 50mm) - 5. SEM photographs of p(HEMA-GMA)-IDA (at a scale of 1mm and 50mm) - 6. ATR-FTIR spectra of nanopolymer a) nano-PHEMA-AB ; b) PHEMA nanopolymer - 7. Graphical illustration of chrome tanning wastewater analysis - 8. Graphical illustration of leather dyeing wastewater analysis - TABLES : 1. Leather process - 2. 2. Cr(III) adsorption capacity of p(HEMA-GMA-IDA) hydrogel membrane from tanning effluent - 3. Dye adsorption capacity of p(HEMA-GMA-IDA)-Cr(III) hydrogel membrane from dye effluent - 4. Dye desorption capacity from p(HEMA-GMA)-IDA-Cr(III) hydrogel membrane - 5. Results of wastewater analysis En ligne : https://drive.google.com/file/d/1JJcD85GUImZHAbn0CcSB5OFfGMnl46Kh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28798 [article]

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Preparation and characterisation of tannery solid waste as an alternative biosorbent for leather dyes / Bianca Mella in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 143-148 Titre : Preparation and characterisation of tannery solid waste as an alternative biosorbent for leather dyes Type de document : texte imprimé Auteurs : Bianca Mella, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 143-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biosorbant Chimie analytique Colorants -- Adsorption Colorants acides Cuirs et peaux -- Déchets -- Recyclage Cuirs et peaux -- Teinture Eaux usées -- Epuration Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this work, surface of a novel sorbent (cattle hair waste — CHW) was characterized and its dye removal ability was tested in an aqueous medium of Acid Blue 161 dye. The isoelectric point, functional groups and morphology were investigated. Sorbent surface and chemical composition were characterised using scanning electron microscopy (SEM) and anergy dispersive X-ray spectroscopy (EDS). The functional group an CHW was investigated using Fourier transform infra-red spectroscopy (FTIR). The specific surface area and pore size distribution were determined by analyzes of BET/BJI-I which showed values considered low when compared to commercial activated cardon, through using SEM, EDS and FTIR we observed the presence of the dye in the adsorbent tested. The level of dye removal. was 70.82% (pH3.0) with maximum amounts of AB-161 dye adsorbed of 7.08mg.g-1. The obtained results offer a promising use for CHW as an efficient eco-friendly sorbent for the treatment of Ieather wastewater containing dyes. Note de contenu : - MATERIALS AND METHODS : Adsorbent preparation - Adsorbent characterisation - Solutions and reagents - Batch adsorption experiments - RESULT AND DISCUSSION : Point of zero charge (pHpzc) - Micrographs - Analyses with energy dispersive X-ray spectroscopy (EDS) - Specific surface area and pore size distribution (BET/BJH) - Fourier transform infrared spectroscopy (FTIR) - 3.7. Thermal analyses - 3.8. Thermogravimetric analysis (TGA) En ligne : https://drive.google.com/file/d/1Ej_oh2xf6N8CADIFO_FxpBbHchvbYgrG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28799 [article]

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Preparation and application of collagen-based waterborne polyurethane retanning agent / Li Chengtao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 149-154 Titre : Preparation and application of collagen-based waterborne polyurethane retanning agent Type de document : texte imprimé Auteurs : Li Chengtao, Auteur ; Qiang Taotao, Auteur ; Li Xiaoning, Auteur ; Zhao Jing, Auteur ; Ren Longfang, Auteur ; Wang Xuechuan, Auteur Année de publication : 2017 Article en page(s) : p. 149-154 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Butanediol Charges (matériaux) Collagène Cuirs et peaux -- Propriétés mécaniques Essais dynamiques Polymères en émulsion Polyoxytétraméthylène glycol Polyuréthanes Prépolymérisation Consiste à faire atteindre, à un élément drapé d'une pièce, un état de début de polymérisation suffisant pour acquérir la stabilité géométrique et la pégosité permettant sa manipulation. Cette opération a également pour but de faciliter la mise en Å“uvre du produit, par exemple : • limiter le fluage ; • limiter le taux de matières volatiles ; • diminuer le collant d'un préimprégné ... Cette opération peut également consister à amorcer une légère polymérisation préalable à un mélange, une résine ou un préimprégné afin de le rendre plus adapté à sa mise en Å“uvre ultérieure. La prépolymérisation permet le stockage de sous-ensembles d'une pièce en attendant l'assemblage en monophase à l'occasion de la polymérisation de l'ensemble des éléments de la pièce. Propionique diméthylol, Acide Retannage Température de retrait Triéthylamine Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A collagen-based waterborne polyurethane retanning agent was prepared by prepolymerization, using isophorone diisocyanate polytetramethylene ether glycol (PTMG, Mn-2000), 1, 4-butanediol (BDO), dimethylol propionic acid (DMPA) and triethylamine (TEA), the collagen powder was added during the synthesis to modify the waterborne polyurethane. The collagen-based waterborne polyurethane was characterised via Fourier transform infrared spectroscopy (FT-1R) and size analysis, the results showed that the collagen was grafted onto the main chain of polyurethane, the emulsion had a.uniform particle size distribution, the average particle size was 70nm. The prepared emulsion was used in retanning, the application result showed that the collagen-based waterborne polyurethane retanning agent had a good affect for leather filling, especially in the belly. The shrinkage temperature, tensile strength and tear resistance were all raised. The retannage can also help to overcome the question of pastel shades. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of the collagen-based waterborne polyurethane - Characterisation of the collagen-based waterborne polyurethane - Retanning application test - Application of the retanning performance test - RESULTS AND DISCUSSION : Characterization of the collagen-based waterborne polyurethane - Results of the retanning performance En ligne : https://drive.google.com/file/d/1USeTWqSt3jU5Yg0kQrC56td3qstf6SeB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28800 [article]

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