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Investigating the catalytic activity of monoclinic zirconia ; oxidation of benzyl alcohol in aqueous medium at mild conditions / M. Sadiq in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 1 (01-02/2012)
[article]
Titre : Investigating the catalytic activity of monoclinic zirconia ; oxidation of benzyl alcohol in aqueous medium at mild conditions Type de document : texte imprimé Auteurs : M. Sadiq, Auteur ; M. Ilyas, Auteur ; S. Alam, Auteur Année de publication : 2012 Article en page(s) : p. 37-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool benzylique -- Oxydation
Benzoïque, Acide
Catalyse
Eaux usées -- Epuration
Surfactants
ZirconiumIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The oxidation/degradation of benzyl alcohol in artificially contaminated water under atmospheric pressure by molecular oxygen/air over ZrO2(m) catalyst was investigated. Monoclinic phase ZrO2 was synthesized and characterized by modern techniques. Oxidation of benzyl alcohol in aqueous medium was carried out in a typical three necked double walled batch reactor equipped with thermometer and condenser. The rate of oxidation was affected by different reaction parameters such as speed of agitation, catalyst loading, temperature, concentration of substrate solution (46.3–185 mmol/L) and partial pressure of oxygen. Major products were detected with GC and UV spectrophotometer. Optimal conditions were setup for better catalytic activity of ZrO2(m). To sum up, catalytic oxidation of benzyl alcohol in aqueous medium by ZrO2(m) is a useful and cheaper method for the conversion of benzyl alcohol to valuable products as well as for the removal of benzyl alcohol from industrial waste water. Note de contenu : - EXPERIMENTAL : Chemicals - Typical procedure for catalyst preparation - Catalytic test and analysis
- RESULTS AND DISCUSSION : Characterization of catalyst - Oxidation alcohol in aqueous medium - Effects of different parametersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13311
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 1 (01-02/2012) . - p. 37-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13561 - Périodique Bibliothèque principale Documentaires Disponible Investigation of a homogeneous activating ozonation method in the rinsing procedure of cotton fabric dyed with reactive dye / Ya-Hong Mao in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)
[article]
Titre : Investigation of a homogeneous activating ozonation method in the rinsing procedure of cotton fabric dyed with reactive dye Type de document : texte imprimé Auteurs : Ya-Hong Mao, Auteur ; Yu Guan, Auteur ; Deng-Hong Luo, Auteur ; Qing-Kang Zheng, Auteur ; Xi-Ning Feng, Auteur ; Xiu-Xing Wang, Auteur Année de publication : 2011 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Oxydation
Colorants réactifs
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Eaux usées -- Epuration
Rinçage
Teinture -- Fibres textiles
Tétra-acétyl-éthylène-diamine
Textiles et tissusIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The textile dyeing process requires the consumption of large quantities of water, which includes huge amounts of coloured wastewater. Usually the rinsing of dyed fabric and the treating of the dyeing house wastewater are separated. The two independent processes not only increase the difficulty of wastewater treatment but also increase the costs of the treatment. In this paper, the ozone/tetraacetylethylenediamine active oxidation technology was employed to rinse dyed fabric and to decolorise the rinsing wastewater simultaneously. The effects of the rinsing conditions on the decolorisation ratio and the chemical oxygen demand Cr value of treated wastewater, and the K/S value, colour difference, tensile strength and fastness of dyed samples were investigated. The results indicated that the decolorisation ratio of the rinsing effluent was greater than 80% and the chemical oxygen demand Cr value decreased more than 58% by the ozone/tetraacetylethylenediamine rinsing process compared with that of traditional rinsing processes. Furthermore, the curve of decolorisation kinetics was in good agreement with a pseudo-first-order kinetic model. In addition, the decolorisation mechanism was also discussed after ultraviolet–visible and ultra performance liquid chromatograph–mass spectrometry analyses of the degraded dye molecule. Note de contenu : EXPERIMENTAL : Materials - Ozonation decolorisation experiment - Dyeing procedure - Rinsing process - Measurements of the output quantity and the utilisation of ozone - Measurements of rinsing effluent - Analysis of the decolorisation kinetics - Tests of dyed fabrics - Measurement of liquid and air surface tension - Analysis of degradation products.
RESULTS AND DISCUSSION : Effect of rinsing conditions on the decolorisation ratio of rinsing effluent - Environmental effect of ozone/TAED rinsing effluent - Ozonation decolorisation reaction kinetics - Effect of ozone/TAED rinsing on the dyed fabric - Destruction of the dye molecule during the ozone/TAED rinsing process.DOI : 10.1111/j.1478-4408.2011.00309.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11906
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Code-barres Cote Support Localisation Section Disponibilité 013185 - Périodique Bibliothèque principale Documentaires Disponible Investigation on treatment of tannery effluent through ozonation / Vasudevan Preethi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 9 (09/2009)
[article]
Titre : Investigation on treatment of tannery effluent through ozonation Type de document : texte imprimé Auteurs : Vasudevan Preethi, Auteur ; K. Iyappan, Auteur ; N. Balasubramanian, Auteur ; C. Srinivasakannan, Auteur Année de publication : 2009 Article en page(s) : p. 302-307 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biodégradation
Cinétique chimique
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Eaux usées -- Epuration
Eaux usées -- Recyclage
OzonationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Experiments were conducted on treatment of leather effluent by ozonation covering wide range in operating conditions. The influence of parameters such as influent pH, ozone flow rate and initial effluent concentration on ozonation efficiency has been critically examined. A maximum of COD removal efficiency of 92% has been achieved under optimum operating conditions. The ozonation of leather effluent has been modeled using pseudo first order kinetics. It has been observed from the present investigation that the biodegradability index of the tannery effluent has increased from an initial value of 0.18 to 0.49 due to ozonation indicating favorable adaptation of the technique as primer for biochemical methods. En ligne : https://drive.google.com/file/d/1DBR_2hghY86GXUypvjjNjgaJSIuvMA5y/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17834
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Code-barres Cote Support Localisation Section Disponibilité 011556 - Périodique Bibliothèque principale Documentaires Disponible 011557 - Périodique Bibliothèque principale Documentaires Disponible Kinetics, equilibrium, and isotherm of the adsorption of chlorine by TDRP / Elles Timothy in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 5 (09-10/2012)
[article]
Titre : Kinetics, equilibrium, and isotherm of the adsorption of chlorine by TDRP Type de document : texte imprimé Auteurs : Elles Timothy, Auteur ; Khaled M. Elsousy, Auteur ; Evans Erric, Auteur Année de publication : 2012 Article en page(s) : p. 376-381 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Chlore
Cinétique chimique
Eaux usées -- Epuration
SurfactantsIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Adsorption of Cl2out of aqueous media by TDRP (tire derived rubber particles) was investigated. For this propose batch system and sodium hypochlorite solutions were used on controllable conditions. The kinetic data were followed more closely to the pseudo-first-order model, the adsorption rate and the effecting parameters such as substrate initial concentration, the TDRP relative quantity, temperature, pH and ionic strength; were studied. The saturation equilibrium and the related parameters (initial concentration, temperature and pH) were also studied. The adsorption isotherm was established and compared to the activated carbon adsorption isotherm. Linearized Langmuir and Freundlich models were tried to estimate the adsorption constants. It was estimated through this study that the adsorption rate is positively affected by rising temperature, adsorbent concentration, TDRP relative quantity, and acidity. The adsorption equilibrium was shifted towards higher adsorption capacity by substrate concentration, temperature and acidity. The adsorption data could be applied to Freundlich and Langmuir and fitted more with Freundlich model. Activation enthalpy of adsorption, the adsorption thermodynamic parameters, the Freundlich and Langmuir constants were obtained. DOI : 10.3139/113.110205 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15872
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Code-barres Cote Support Localisation Section Disponibilité 14156 - Périodique Bibliothèque principale Documentaires Disponible Measurement of colour difference in the leather dyeing process with natural dyes in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 1 (01-02/2003)
[article]
Titre : Measurement of colour difference in the leather dyeing process with natural dyes Type de document : texte imprimé Année de publication : 2003 Article en page(s) : p. 25-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Caractérisation
Chrome
Colorants naturels
Cuirs et peaux -- Teinture
Eaux usées -- Epuration
Formulation (Génie chimique)
Solidité de la couleur
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminiumIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper looks into a tanning and dyeing process offering clean technology, which is in the limelight these days as an advanced leather making technology of the future sought by leather industries both at home and abroad.
First of all, chrome-tanned leather is treated with two types of tanning agents (Al and Cr) to manufacture wet-blue and wet-white leather. After the tanning process, various colouring matters and the powder-type natural dye were applied to the leather and, on the basis of the Munsell value function, the chromaticity diagram of the colour system and characteristics such as hue, value and chroma were measured.
The colour deepened markedly according to the amount of natural dye used, and multiple colours were obtained depending on the mordant in use.
The quality of leather was outstanding, test results gave grade 4 or 5 in such categories as colour fastness to rub, wash, heat and light. In addition, the colour was brighter and cleaner on the wet-white non-chrome tanned leather than on the wet-blue.Note de contenu : - Materials and equipment
- Characterisation of leather samples
- Fig. 1 : Application of tanning agents and natural dyes
- Fig. 2 : Manufacturing diagram for natural dyes
- Fig. 3 : Colour difference of natural dyes depending on tanning conditions
- Table 1 : Characteristics of natural dyes
- Table 2 : Formulation of the tanning and dyeing process
- Table 3 : Classification of colouring matter of monogenetic colours and polygenetic colours
- Table 4 : Hue differences in the CIELAB system of wet-blue and wet-white with natural dyes
- Table 5 : Colour fastness of leather dyed by natural dyes
- Table 6 : Average treatment level of effluents from natural dye and synthetic dye effluentsEn ligne : https://drive.google.com/file/d/1dJVtGjDvKh6CKJQMYLCt8YYWYRnmkEIz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39808
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 1 (01-02/2003) . - p. 25-29[article]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)
PermalinkMémento technique de l'eau / Rueil-Malmaison : Degrémont (2006)
PermalinkModification of activated carbon with a silane coupling agent under ultrasonic conditions for the advanced treatment of wastewater with dressing chemicals / Jin Xiao in COLORATION TECHNOLOGY, Vol. 135, N° 1 (02/2019)
PermalinkMulti-cyclones - the perfect solution / Martin Fahr in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 12, N° 3 (2019)
PermalinkNanocomposites magnétiques à base de silice préparés par des méthodes vertes : synthèse, propriétés et application dans le traitement de l’eau / S. Abramson in MATERIAUX & TECHNIQUES, Vol. 100, N° 3 (2012)
PermalinkNanotechnologies for leather manufacturing : a review / Chen Yi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 8 (08/2011)
PermalinkNatural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor / E. T. Deva Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
PermalinkNon-thermal plasma degradation of dye using an underwater dielectric barrier discharge created inside a porous hydrophobic ceramic tube / Jin-Oh Jo in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)
PermalinkUn nouveau concept pour recycler les eaux de rincçage in GALVANO ORGANO, N° 792 (27/04/2010)
PermalinkLes nouvelles voies de l'électrochimie / Marc Thomalla in L'ACTUALITE CHIMIQUE, N° 10 (10/1998)
PermalinkOptimisation et conditionnement chimique des boues / Marie-Andrée Sirvain in GALVANO ORGANO, N° 843 (12/2015)
PermalinkOptimisation for preparation conditions of modified bioflocculant based on the tannery wastewater treatment / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 3 (05-06/2022)
PermalinkOptimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater / Guangyu Ran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
PermalinkOptimisation des ressources en eau des tanneries par recyclage des effluents / Marie-Laure Touloumet in CTC ENTREPRISES, (11/2010)
PermalinkOxidative beamhouse processing / Gustavo Adrià n Defeo in LEATHER INTERNATIONAL, Vol. 214, N° 4821 (06/2012)
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