Anionic surfactants removal by natural coagulant/flocculant products / J. Beltrán-Heredia in Industrial & engineering chemistry research, Vol. 48 N° 10 (Mai 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5085–5092 Titre : Anionic surfactants removal by natural coagulant/flocculant products Type de document : texte imprimé Auteurs : J. Beltrán-Heredia, Auteur ; J. Sánchez-Martín, Auteur ; C. Solera-Hernández, Auteur Année de publication : 2009 Article en page(s) : pp. 5085–5092 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Coagulant agent Flocculant Sodium dodecyl benzene sulfonate Anionic surfactant Résumé : A new tannin-based coagulant and flocculant agent has been tested on the removal of sodium dodecyl benzene sulfonate (SDBS), a dangerous and pollutant anionic surfactant. It is called Tanfloc and consists of a chemically modified tannin extract from Acacia mearnsii de Wild. Tanfloc has been revealed as an efficient product in anionic surfactant removal. Around 70% of SDBS removal has been achieved with Tanfloc doses of 150 mg·L−1. pH has a negative influence on surfactant removal, while the higher the initial surfactant concentration is the higher q capacity is obtained. Theoretical data adjustment has been carried out according to three different models: Frumkin−Fowler−Guggenheim (FFG), Gu and Zhu (G−Z), and Freundlich (F). Adjustment parameters have been obtained with r2 levels above 0.90 in all cases. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801913y [article] Anionic surfactants removal by natural coagulant/flocculant products [texte imprimé] / J. Beltrán-Heredia, Auteur ; J. Sánchez-Martín, Auteur ; C. Solera-Hernández, Auteur . - 2009 . - pp. 5085–5092. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5085–5092 Mots-clés : Coagulant agent Flocculant Sodium dodecyl benzene sulfonate Anionic surfactant Résumé : A new tannin-based coagulant and flocculant agent has been tested on the removal of sodium dodecyl benzene sulfonate (SDBS), a dangerous and pollutant anionic surfactant. It is called Tanfloc and consists of a chemically modified tannin extract from Acacia mearnsii de Wild. Tanfloc has been revealed as an efficient product in anionic surfactant removal. Around 70% of SDBS removal has been achieved with Tanfloc doses of 150 mg·L−1. pH has a negative influence on surfactant removal, while the higher the initial surfactant concentration is the higher q capacity is obtained. Theoretical data adjustment has been carried out according to three different models: Frumkin−Fowler−Guggenheim (FFG), Gu and Zhu (G−Z), and Freundlich (F). Adjustment parameters have been obtained with r2 levels above 0.90 in all cases. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801913y

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Removal of carmine indigo dye with moringa oleifera seed extract / J. Beltrán-Heredia in Industrial & engineering chemistry research, Vol. 48 N° 14 (Juillet 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6512–6520 Titre : Removal of carmine indigo dye with moringa oleifera seed extract Type de document : texte imprimé Auteurs : J. Beltrán-Heredia, Auteur ; J. Sánchez-Martín, Auteur ; A. Delgado-Regalado, Auteur Année de publication : 2009 Article en page(s) : pp. 6512–6520 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Moringa oleifera Carmine Indigo Résumé : Moringa oleifera has been tested as an active agent in removing various types of anionic dyes. Specially, removal of an indigoid dye, Carmine Indigo, has been tested. The fast kinetics of coagulant action and the high potential of this coagulant agent to treat wastewater from dyestuff has been revealed. Moringa oleifera is fully working in coagulation and flocculation process, and it achieves an average level of removal up to 80%. The pH does not affect the coagulant process, and temperature has a negative influence. By increasing initial dye concentration, lower dye percentage removal is achieved and higher q is presented. Coagulation and flocculation processes can be estimated by the Langmuir and Freundlich models, but the first one gives a better explanation of the coagulation and adsorption behavior (r2 equal to 0.97). Carmine Indigo removal presents an optimum q capacity at 343 mg·L−1 and 11.2 °C. Pilot plant installation gives a similar efficiency for dye removal. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004833 [article] Removal of carmine indigo dye with moringa oleifera seed extract [texte imprimé] / J. Beltrán-Heredia, Auteur ; J. Sánchez-Martín, Auteur ; A. Delgado-Regalado, Auteur . - 2009 . - pp. 6512–6520. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6512–6520 Mots-clés : Moringa oleifera Carmine Indigo Résumé : Moringa oleifera has been tested as an active agent in removing various types of anionic dyes. Specially, removal of an indigoid dye, Carmine Indigo, has been tested. The fast kinetics of coagulant action and the high potential of this coagulant agent to treat wastewater from dyestuff has been revealed. Moringa oleifera is fully working in coagulation and flocculation process, and it achieves an average level of removal up to 80%. The pH does not affect the coagulant process, and temperature has a negative influence. By increasing initial dye concentration, lower dye percentage removal is achieved and higher q is presented. Coagulation and flocculation processes can be estimated by the Langmuir and Freundlich models, but the first one gives a better explanation of the coagulation and adsorption behavior (r2 equal to 0.97). Carmine Indigo removal presents an optimum q capacity at 343 mg·L−1 and 11.2 °C. Pilot plant installation gives a similar efficiency for dye removal. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004833

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