Documents disponibles écrits par cet auteur

Empirical models for the decoloration of dyes in an electrochemical batch cell / Montserrat Pepio in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 8965–8972 Titre : Empirical models for the decoloration of dyes in an electrochemical batch cell Type de document : texte imprimé Auteurs : Montserrat Pepio, Auteur ; M. Carmen Gutierrez-Bouzan, Auteur Année de publication : 2011 Article en page(s) : pp. 8965–8972 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Batchwise  Dyes  Discoloration  Empirical  model Résumé : Among several types of textiles colorants, reactive dyes represent about 30-50% of the total market share, and the most common group used as chromophore is the azo group (70%), followed by anthraquinone. The removal of such dyes from wastewater is a problem in textile mills. Electrochemical treatment has proven to be an interesting technique for removing dyes from wastewater, as it does not require any added chemical reagents. Generally, this technique is applied to obtain partial dye degradation (until color removal). In this work, electrochemical treatment was performed in a batch cell. The influence of conductivity, temperature, pH, dye concentration, and dyeing electrolyte on the decoloration was studied. The time required to reach a fixed level of decoloration and the corresponding electricity consumption were also evaluated. Six reactive dyes with different chromophores and reactive goups were selected. The main statistical study was carried out on CI Reactive Orange 13, a textile dye with the commercial name Procion Orange PX-2R (OrPX). Subsequently, the behavior of the other dyes was studied in comparison with the OrPX models. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395842 [article] Empirical models for the decoloration of dyes in an electrochemical batch cell [texte imprimé] / Montserrat Pepio, Auteur ; M. Carmen Gutierrez-Bouzan, Auteur . - 2011 . - pp. 8965–8972. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 8965–8972 Mots-clés : Batchwise  Dyes  Discoloration  Empirical  model Résumé : Among several types of textiles colorants, reactive dyes represent about 30-50% of the total market share, and the most common group used as chromophore is the azo group (70%), followed by anthraquinone. The removal of such dyes from wastewater is a problem in textile mills. Electrochemical treatment has proven to be an interesting technique for removing dyes from wastewater, as it does not require any added chemical reagents. Generally, this technique is applied to obtain partial dye degradation (until color removal). In this work, electrochemical treatment was performed in a batch cell. The influence of conductivity, temperature, pH, dye concentration, and dyeing electrolyte on the decoloration was studied. The time required to reach a fixed level of decoloration and the corresponding electricity consumption were also evaluated. Six reactive dyes with different chromophores and reactive goups were selected. The main statistical study was carried out on CI Reactive Orange 13, a textile dye with the commercial name Procion Orange PX-2R (OrPX). Subsequently, the behavior of the other dyes was studied in comparison with the OrPX models. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395842

Modeling the effects of color on the UV protection provided by cotton woven fabrics dyed with azo dyestuffs / Ascensión Riva in Industrial & engineering chemistry research, Vol. 48 N° 22 (Novembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9817–9822 Titre : Modeling the effects of color on the UV protection provided by cotton woven fabrics dyed with azo dyestuffs Type de document : texte imprimé Auteurs : Ascensión Riva, Auteur ; Inés Algaba, Auteur ; Montserrat Pepio, Auteur Année de publication : 2010 Article en page(s) : pp. 9817–9822 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Color  UV  radiation  Ultraviolet  protection  factor Résumé : Color is one of the most influential variables on the protection against ultraviolet radiation provided by a fabric. The protection against UV radiation of a fabric is expressed quantitatively by means of its UPF (ultraviolet protection factor). The present paper shows the results of a study about the influence of the color on the UPF of cotton woven fabrics appropriate for summer articles. Through statistical models, the research seeks to relate the level of protection achieved in dyeing with three azo dyes to the factors governing the process, the shade, and the color intensity, as well as their interaction with the initial UPF of the fabrics. The obtained models will allow the programming and optimization of the value of the UPF of a fabric by means of adequate adjustment of the variables. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9006694 [article] Modeling the effects of color on the UV protection provided by cotton woven fabrics dyed with azo dyestuffs [texte imprimé] / Ascensión Riva, Auteur ; Inés Algaba, Auteur ; Montserrat Pepio, Auteur . - 2010 . - pp. 9817–9822. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9817–9822 Mots-clés : Color  UV  radiation  Ultraviolet  protection  factor Résumé : Color is one of the most influential variables on the protection against ultraviolet radiation provided by a fabric. The protection against UV radiation of a fabric is expressed quantitatively by means of its UPF (ultraviolet protection factor). The present paper shows the results of a study about the influence of the color on the UPF of cotton woven fabrics appropriate for summer articles. Through statistical models, the research seeks to relate the level of protection achieved in dyeing with three azo dyes to the factors governing the process, the shade, and the color intensity, as well as their interaction with the initial UPF of the fabrics. The obtained models will allow the programming and optimization of the value of the UPF of a fabric by means of adequate adjustment of the variables. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9006694