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Raw skin wastes - Used to prepare a collagen fibre adsorbent for the chromatographic separation of flavonoids / Zhang Qixian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 3 (05-06/2014)
[article]
Titre : Raw skin wastes - Used to prepare a collagen fibre adsorbent for the chromatographic separation of flavonoids Type de document : texte imprimé Auteurs : Zhang Qixian, Auteur ; Li Xinxin, Auteur ; Li Juan, Auteur ; Wenhua Zhang, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2014 Article en page(s) : p. 93-98 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Adsorption
Chromatographie
Collagène
Cuirs et peaux -- Déchets
Flavonoïdes
Gel de silice
Matériaux poreux
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Séparation (technologie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : To explore the new approach of value-added utilization of tannery skin wastes, a novel column packing material, collagen fibre adsorbent (CFA), was prepared by using skin wastes as raw material. In the present study, the separation application of CFA on flavonoids and its comparison with other current packing materials (silica gel, polyamide, D101 macroporous resin and Sephadex LH-20) were investigated. Rutin and kaempferol were selected as model flavonoids. Static adsorption indicated that the adsorption capacity of CFA to rutin and kaempferol was different, and the extent of adsorption of kaempferol was lower because it has fewer hydroxyl groups/hydrogen-bond reaction sites. In CFA column chromatography separation, the mixture of rutin and kaemoferol could be well separated by stepwise elution with 90% and 50% aqueous ethanol solutions, and their recoveries were 90.02% and 94.60%, respectively.
However, in comparison with CFA, rutin and kaempferol could not be well separated and recovered by using silica gel, polyamide and D101 macroporous resin columns. In addition, the cost of CFA is much lower, especially compared with Sephadex LH-20. Therefore, CFA has the potential to be applied as a packing material for separation of flavonoids.Note de contenu : - MATERIALS AND METHODS : Materials and equipments - Preparation of CFA - Static adsorption capability of CFA
- RESULTS AND DISCUSSION : Characterization of CFA by SEM analysis - Static adsorption capability of CFA - Chromatographic separation performance of CFA - Price estimation of CFAEn ligne : https://drive.google.com/file/d/1qDjmuTspuQTaf7gyPhUobxdXpL6fZ3gu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21528
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Code-barres Cote Support Localisation Section Disponibilité 16323 - Périodique Bibliothèque principale Documentaires Disponible Recent advances in skin collagen : functionality and non-medical applications / Yanting Han in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)
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Titre : Recent advances in skin collagen : functionality and non-medical applications Type de document : texte imprimé Auteurs : Yanting Han, Auteur ; Jinlian Hu, Auteur ; Gang Sun, Auteur Année de publication : 2021 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Blindage (électricité)
Collagène
Eau -- Epuration
Effet mémoire de forme
Electronique -- Matériaux
Imperméabilisation
Matériaux intelligents
Matrices
Peau artificielleIndex. décimale : 611.78 Peau et ongles Résumé : During nature evolution process, living organisms have gradually adapted to the environment and been adept in synthesizing high performance structural materials at mild conditions by using fairly simple building elements. The skin, as the largest organ of animals, is such a representative example. Conferred by its intricate organization where collagen fibers are arranged in a randomly interwoven network, skin collagen (SC), defined as a biomass derived from skin by removing non-collagen components displays remarkable performance with combinations of mechanical properties, chemical-reactivity and biocompatibility, which far surpasses those of synthetic materials. At present, the application of SC in medical field has been largely studied, and there have been many reviews summarizing these efforts. However, the generalized view on the aspects of SC as smart materials in non-medical fields is still lacking, although SC has shown great potential in terms of its intrinsic properties and functionality. Hence, this review will provide a comprehensive summary that integrated the recent advances in SC, including its preparation method, structure, reactivity, and functionality, as well as applications, particularly in the promising area of smart materials. Note de contenu : - Preparation of SC
- Structure of SC
- Modification of SC
- Advanced properties and non-medical applications : Water treatment - Biotemplate - Wave-adsorbing/shielding - Shape memory - Waterproof - Electronic skin
- Table 1 : Modification agents for SCDOI : https://doi.org/10.1186/s42825-020-00046-9 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00046-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37465
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 12 p.[article]Recovery of chromium(III) from chrome tanning wastewater by precipitation and adsorption / Minghua Liu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
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Titre : Recovery of chromium(III) from chrome tanning wastewater by precipitation and adsorption Type de document : texte imprimé Auteurs : Minghua Liu, Auteur ; Zhou Hualong, Auteur ; Zhang Huaiyu, Auteur Année de publication : 2006 Article en page(s) : p. 183-187 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Adsorption
Chrome trivalent
Eaux usées -- Décontamination
Floculant
Hydroxyde de sodiumL'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol.
La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude.
Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate.
La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante.
Lignine sulfonique
PolyacrylamideLe polyacrylamide est un polymère (-CH2-CH(-CONH2)-) formé à partir d'acrylamide. Il peut être réticulé en incorporant dans le mélange de polymérisation un dérivé bi-fonctionnel de l'acrylamide : le N,N'-méthylène-bis-acrylamide (CH2=CH-CO-NH-)2CH2.
Le polyacrylamide, contrairement à l'acrylamide qui est neurotoxique, n'est pas toxique mais il doit être manipulé avec précaution car il peut contenir des résidus d'acrylamide. c'est un gel hautement absorbant. Sous forme de poudre, il se dilue dans l'eau pour former un gel visqueux après agitation vigoureuse.
Des substances ioniques telles le sel permettent au polyacrylamide de libérer les substances absorbées.
L'intérêt de ce polymère peut être apprécié dans son caractère de fluide non newtonien, et constitue un bon exemple d'application de l'effet Weissenberg: le fluide, soumis à l'action d'un agitateur magnétique remonte au centre du récipient au lieu de se plaquer sur les côtés, comme l'aurait fait un fluide newtonien classique, comme l'eau.
Polymères cationiques
Précipitants
Précipitation (chimie)
Récupération (Déchets, etc.)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The study was conducted regarding the recovery of chromium(III) from chrome tanning wastewater by precipitation and adsorption processes. The adsorption was conducted with a spherical sulfonic lignin adsorbent, denoted as SSLA and the factors affecting the precipitation and adsorption as well as desorption were comprehensively discussed. The recovery reached 91.6% by applying 12.0g/L of sodium hydroxide as precipitant, 25mg/L of cationic polyacrylamide as flocculant and 3.0g/g Cr of H2SO4 as solution medium. The adsorption of chromium(III) from the supernatant liquid with SSLA has been found to be initially pH andconcentration dependent aided by higher adsorption temperature which helps to improve the adsorption capacity of SSLA. The breakthrough adsorption capacity of SSLA is 63.5mg/g, and the saturated adsorption capacity is 76.3mg/g.
Moreover, the chromium(III) adsorbed on SSLA can be recovered with 1.0mol/L H2SO4 solution, the recovery is approximately 99.6%. It has been proved from the cost analysis that the recovery of chromium(III) from the chrome tanning wastewater by precipitation and adsorption processes is a promising and economically feasible technique.Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Intrumentation - Preparation of SSLA adsorbent - Precipitation treatment - Adsorption/Desorption treatment
- RESULTS AND DISCUSSION : Optimization of the precipitation conditions - Precipitant species - Effect of the sodium hydroxide dosage - Effect of the cationic polyacrylamide dosage - Dissolution tests - Adsorption tests - Effect of effluent pH - Effect of flow rate - Effect of initial concentration of chromium(III) - Effect of adsorption temperature - Breakthrough adsorption tests - Desorption and Recovery tests - Cost analysis of chromium(III) recovery
- Table 1 : Some physiochemical characteristics of the chrome tanning wastewater
- Table 2 : Effect of the precipitant species on the precipitation efficiency
- Table 3 : Results of desorption and recovery tests
- Table 4 : Treatment cost of chromium recoveryEn ligne : https://drive.google.com/file/d/1rdW2zjs-kTYsRlUg8vYbxYNIFiqJ96Jp/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39053
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 5 (09-10/2006) . - p. 183-187[article]Recovery of chromium(III) ions from aqueous solution by carboxylate functionalized wood fibres / Yin Zhonglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 3 (05-06/2015)
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Titre : Recovery of chromium(III) ions from aqueous solution by carboxylate functionalized wood fibres Type de document : texte imprimé Auteurs : Yin Zhonglong, Auteur ; Chen Baihua, Auteur ; Chen Min, Auteur ; Hu Sheng, Auteur ; Cheng Haiming, Auteur Année de publication : 2015 Article en page(s) : p. 101-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Adsorption
Carboxylate
Chrome trivalent
Eaux usées -- Recyclage
Greffage (chimie)
Laine
Récupération (Déchets, etc.)
Solutions aqueuses (chimie)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The application of wool fibres for recovery of heavy metal ions is equivalent to the use of one waste to clean-up of another. A carboxylate functionalized wool fibre (PAA-g-Wool) was prepared by grafting poly(acrylic acid) onto the surface of wool fibre in the presence of potassium permanganate and oxalic acid as a redox initiator system. The graft percentage was 80.2%. The PAA-g-Wool adsorbent was applied to absorb chromium(III) from aqueous solutions in a batchwise manner. The optimum pH for recovery of chromium(III) by PAA-g-Wool was found to be 6.0. Kinetic studies show that the sorption process agrees with the pseudo-second-order kinetic model, with the correlation coefficient (R2) more than 0.99. The adsorption equilibrium of chromium(III) was well defined by the Langmuir isotherm equation, and the adsorption capacity was found to be 95.78mg/g calculated by the Langmuir isotherm equation. After recycling for 5 times, the adsorption capacity of PAA-g-Wool to chromium ions was still maintained at 90%. The PAA-g-Wool could recover 97.1% of chromium(III) ions in the tannery wastewater. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of PAA-g-wool fibres - FTIR analysis - SEM analysis - Batch adsorption experiments - Effect of initial pH - Effect of contact time - Effect of initial concentration of chromium (III) - Desorption and recycling experiments - Treatment of tannery wastewater
- RESULTS AND DISCUSSION : Preparation and characterization of PAA-g-wool - Effect of pH - Adsorption kinetics - Adsorption isotherms - Recycling adsorption - Treatment of tannery wastewaterEn ligne : https://drive.google.com/file/d/14Bf5R3-VSJ7uyRn6R4GbQBB8Zk8r-r-s/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24252
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Code-barres Cote Support Localisation Section Disponibilité 17271 - Périodique Bibliothèque principale Documentaires Disponible 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)
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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. Şenay, 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 méthacrylateIndex. 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 analysisEn ligne : https://drive.google.com/file/d/1JJcD85GUImZHAbn0CcSB5OFfGMnl46Kh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28798
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