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Electrocoagulation of azo dye production wastewater with iron electrodes : process evaluation by multi-response central composite design / Idil Arslan-Alaton in COLORATION TECHNOLOGY, Vol. 125, N° 4 (2009)
[article]
Titre : Electrocoagulation of azo dye production wastewater with iron electrodes : process evaluation by multi-response central composite design Type de document : texte imprimé Auteurs : Idil Arslan-Alaton, Auteur ; Mehmet Kobya, Auteur ; Abdurrahman Akyol, Auteur ; Mahmut Bayramoglu, Auteur Année de publication : 2009 Article en page(s) : p. 234-241 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Central composite design was used to optimise electrocoagulation of CI Acid Blue 193 production wastewater. By applying a response surface quadratic model, the main process manipulators (effluent chemical oxygen demand, initial pH, electrical current density and treatment time) were optimised to achieve maximum colour, chemical oxygen demand and total organic compound removals. Analysis of variance indicated that the established polynomial regression models were significant and fitted the experimental data satisfactorily. DOI : 10.1111/j.1478-4408.2009.00202.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2009.00202.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6217
in COLORATION TECHNOLOGY > Vol. 125, N° 4 (2009) . - p. 234-241[article]Réservation
Réserver ce documentOzonation of the reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) : kinetic assessment, ozonation products and ecotoxicity / Idil Arslan-Alaton in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
[article]
Titre : Ozonation of the reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) : kinetic assessment, ozonation products and ecotoxicity Type de document : texte imprimé Auteurs : Idil Arslan-Alaton, Auteur ; Gulcan Basar, Auteur ; Tugba Olmez, Auteur Année de publication : 2012 Article en page(s) : p. 387-394 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Oxydation
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OzonationIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Ozonation of the commercially important, recalcitrant reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) was investigated. Ozonation performance was examined by following ozone absorption rates and K-Acid, chemical oxygen demand and total organic carbon removals. Mean oxidation states and unidentified organic products were also determined. At pH 3, where direct ozone reactions are dominant, the second-order rate constant between K-Acid and molecular ozone was determined as 20 m?1 s?1 for steady-state aqueous ozone concentration. The competition kinetics approach was also adopted where a reference compound, phenol, and K-Acid were subjected to ozonation. By applying this method, the second-order reaction rate constant was found to be 76 m?1 s?1. Common oxidation products formed during ozonation at pH 3, pH 7 and pH 7 with 1 mm hydrogen peroxide were identified as methoxy-phenyl-oxime, phenol, benzene, benzaldehyde and oxalic acid via high-performance liquid chromatography and gas chromatography/mass spectrometry analyses. Continuous nitrate and sulphate evolution were observed during K-Acid ozonation as a consequence of the abrupt release and subsequent oxidation of its amino and sulphonate groups. The number and amount of reaction products were most intensive for K-Acid ozonation at pH 7 with 1 mm hydrogen peroxide. According to the acute toxicity tests conducted with Vibrio fischeri, ozonation products were not less toxic than the original K-Acid solution that caused only 15% inhibition. Note de contenu : - EXPERIMENTAL : Materials - Ozonation experiments - Oxidation products identification - Other analytical procedures - Acute toxicity
- RESULTS AND DISCUSSION : Baseline experiments - Kinetic assessment - Ozonation products and acute toxicity assessment - Changes i acute toxicityDOI : 10.1111/j.1478-4408.2012.00392.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00392.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15807
in COLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 387-394[article]Réservation
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