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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]  in Industrial & 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  agent  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  agent  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