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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Leather retanning performance of carboxylated collagen fibres containing adsorbed Cr(III) / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 4 (07-08/2018) . - p. 187-193 Titre : Leather retanning performance of carboxylated collagen fibres containing adsorbed Cr(III) Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Song Yunying, Auteur ; Bu Qiaoqiao ; Wang Xuechuan ; Li Ji ; Li Lu Année de publication : 2018 Article en page(s) : p. 187-193 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Carboxylation Collagène Cuir -- Teneur en chrome trivalent Cuirs et peaux d'esturgeon Cuirs et peaux de moutons Cuirs et peaux de Poissons Extraction (chimie) Glyoxylique, Acide L'acide glyoxylique ou acide oxoacétique est un acide organique. Avec l'acide acétique, l'acide glycolique et l'acide oxalique, l'acide glyoxylique est l'un des acides carboxyliques en C2. C'est un solide incolore naturellement présent et il est utile industriellement. Hydrolysats de protéines Hydrolyse enzymatique Retannage Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Carboxylated collagen fibre (CCF) was prepared using glyoxylic acid modified collagen fibre which was extracted from fresh pigskin, the prepared CCF was used as an adsorbent to treat trivalent chromium ions (Cr(III)) in wastewater (Cr-CCF). Alkali-enzyme hydrolysis was used to extract collagen protein from the CCF after the adsorption of Cr(III) to obtain chromium-containing collagen hydrolyzate (Cr-CCH). Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC) were employed to analyse the structure and relative molecular mass distribution of the collagen in Cr-CCH. The Cr(III) content was determined by diphenylcarbazide spectrophotometry. The optimal hydrolysis conditions were optimised by single factor experiments with the collagen extraction rate as the index. Finally, sheep and sturgeon wet-blue was chosen to evaluate the retanning efficiency of Cru-CCH. The satisfactory sensory and mechanical properties of the finished leather demonstrated that Cr-CCH could become a good candidate as a retanning agent, which not only satisfied performance requirements for finished leather, but also achieved recycling of resources. Note de contenu : - EXPERIMENTAL PROCEDURES : Material and apparatus - Preparation of CFF - Preparation of Cr-CCF - Alkali-enzyme hydrolysis of Cr-CCF - Characterization of Cr-CCH - Retanning performance of Cr-CCH - RESULTS AND DISCUSSION : The single factor effect of Cr-CCH - The characterization of hydrolysos performance - The retanning performance of Cr-CCH En ligne : https://drive.google.com/file/d/1-gpslAR_wnZbgfSQB-krSGQLXYwcPxJp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30901 [article]

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Tanning technique of sturgeon skin / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 5 (09-10/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 5 (09-10/2014) . - p. 229-235 Titre : Tanning technique of sturgeon skin Type de document : texte imprimé Auteurs : Qiang Taotao, Auteur ; Bu Qiaoqiao, Auteur ; Ren Longfang, Auteur ; Wang Xuechuan, Auteur ; Meng Xianglin, Auteur Année de publication : 2014 Article en page(s) : p. 229-235 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux d'esturgeon Cuirs et peaux de Poissons Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Using artificially bred sturgeon skin as the raw material, the character of the skin's organizational structure was researched. in order to keep the integrity of its naturel and special scale structure and aise to enhance the removal of melanin on the grain surface as well as the fat inside the skin, various techniques like mechanical strength reduction, oxidation-reduction bleach, multi-procedure degreasing and manuel fleshing etc. were adopted during the tanning procedure. A set of mature and feasible tanning process for sturgeon skin was obtained. The softness and fullness as well as the physical mechanical performance of the finished leather made by the process are good, and it would be a good choice for the high-end bags. Note de contenu : - EXPERIMENTAL SECTION : Materials and equipments - Organizational structure characteristics of the sturgeon skin - Procedure - Determination of oil content in the sturgeon skin - Sensory evaluation of sturgeon leather - RESULTS AND DISCUSSION : Oil content in the sturgeon skin - Sensory evaluation of sturgeon leather - Property testing of sturgeon leather - Tanning procedure of sturgeon leathe - Table I : The sensory evaluation results of sturgeon leather - Table II : Physical and chemical property indexes of sturgeon leather - Table III : Tannin procedure of sturgeon leather En ligne : https://drive.google.com/file/d/1GgPq-1JxiJmqrHNutWouzteXUqYjg3YN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22275 [article]

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