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Removal of methylene blue from aqueous solutions by using cold plasma- and formaldehyde-treated onion skins / Cafer Saka in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)
[article]
Titre : Removal of methylene blue from aqueous solutions by using cold plasma- and formaldehyde-treated onion skins Type de document : texte imprimé Auteurs : Cafer Saka, Auteur ; Ömer Satin, Auteur Année de publication : 2011 Article en page(s) : p. 246-255 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Bleu de méthylèneTags : 'Bleu méthylène' Adsorption' 'Plasma froid' 'Peau oignon' Formaldéhyde Biosorbant Sorption 'Modèles isothermes' FTIR Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, the use of cold plasma-treated and formaldehyde-treated onion skins as a biosorbent has been investigated to remove methylene blue dye from aqueous solutions. The surface characteristics of the treated onion skins were investigated using Fourier Transform–infrared spectroscopy. The influence of process variables such as adsorbent dosage, initial dye concentration and pH were studied. Equilibrium isotherms were analysed by Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherm models. The results indicated that the data for adsorption of methylene blue onto onion skins fitted well with the Langmuir isotherm model. The sorption capacities for cold plasma-treated and formaldehyde-treated onion skins by Langmuir isotherm were found to be 250 and 166.67 mg/g, respectively. The equilibrium time was found to be 150 min for 50 mg/l dye concentrations. The maximum removals for cold plasma-treated and formaldehyde-treated onion skins obtained were 90.94 and 95.54% at natural pH 10.0 for adsorbent doses of 0.15 g/200 ml, respectively. The rates of sorption were found to conform to pseudo-first-order kinetics. Results indicated that onion skins could be used as a biosorbent to remove methylene blue dye from contaminated waters. Note de contenu : - Zero point of charge determination
- Effect of plasma applying time on surface area
- FTIR analysis
- Effect of pH
- Effect of contact time and initial concentration on adsorption
- Effect of adsorbent dosage on adsorption kinetics
- Adsorption kinetic studies
- Adsorption isotherms modelsDOI : 10.1111/j.1478-4408.2011.00306.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11905
in COLORATION TECHNOLOGY > Vol. 127, N° 4 (2011) . - p. 246-255[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013185 - Périodique Bibliothèque principale Documentaires Disponible Controlling the growth of extremely halophilic bacteria on brine cured cattle-hides / Meral Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 5 (09-10/2000)
[article]
Titre : Controlling the growth of extremely halophilic bacteria on brine cured cattle-hides Type de document : texte imprimé Auteurs : Meral Birbir, Auteur ; D. G. Belay, Auteur Année de publication : 2000 Article en page(s) : p. 201-204 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens
Bactéries -- Croissance
Bactéries halophiles
Cuirs et peaux -- Conservation
Cuirs et peaux de bovinsTags : Naphtalène Dichlorobenzène 'Trichloro-S-triazinetrione' 'sulfate de sodium' 'Bisulfite sacide acétique 'Ethoxylate diméthyle potassium dithiocarbamate '2(thiocyanométhylthio)benzothiazole' 'Bis(thiocyanate) méthylène' 'Ortho-phénylphénate 'Ortho-benzyl-para-chlorophénol' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Six commercially available brine raceway bactericides were tested for their ability to prevent the growth of extremely halophilic bacteria isolated from hides that were brine cured in either the US or Canada.
These products were used at their recommended raceway doses and at two times and four times that amount. The active ingredients of the commercially available bactericides were: naphthalene and 1-2 dichlorobenzene (Bactericide A), trichloro-S-triazinetrione and sodium sulphate (Bactericide B), sodium bisulfite and acetic acid (Bactericide C), alkyl phenol ethoxylate and potassium dimethyl dithrocarbonate (Bactericide D), 2(thiocyanomethylthio) benzothiazole and methylene bis (thiocyanate) (Bactericide E), sodium-ortho-phenylphenate and ortho- benzyl-para-chlorophenol (Bactericide F).
Bactericides A, B and E were found to be effective in preventing growth of the extremely halophilic bacteria tested. Bactericides C, D and F were found to be ineffective at the concentrations tested. All of the extremely halophilic isolates used in this experiments showed positive gelatinase activity.Note de contenu : - Table 1 : Bactericides tested on extremely halophilic bacteria
- Table 2 : Effect of bactericides on extremely halophilic bacterial growthEn ligne : https://drive.google.com/file/d/1l9lBTBXX8_j6sZDgznrd2XZEqkhforCw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40917
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 5 (09-10/2000) . - p. 201-204[article]