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Adsorption behavior studies of picric acid on mesoporous MCM-41 / Hamid Sepehrian in Industrial & engineering chemistry research, Vol. 48 N° 14 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6772–6775 Titre : Adsorption behavior studies of picric acid on mesoporous MCM-41 Type de document : texte imprimé Auteurs : Hamid Sepehrian, Auteur ; Javad Fasihi, Auteur ; Mohamad Khayatzadeh Mahani, Auteur Année de publication : 2009 Article en page(s) : pp. 6772–6775 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Wastewater  Mesoporous  silicate  MCM-41  Hydrothermal  method  XRD Résumé : The presence of nitrophenols in wastewater is of great environmental concern. In this paper, mesoporous silicate MCM-41 has been prepared by the hydrothermal method and characterized by XRD, the nitrogen adsorption isotherm, and elemental analysis. Adsorption behaviors of 2,4,6-trinitrophenol (picric acid) on the calcined and uncalcined mesoporous MCM-41 adsorbents were studied. The experimental adsorption isotherm was successfully described by the Langmuir model. The pH effect, adsorption kinetics, and breakthrough curves were studied by batch and column methods. The adsorption capacity of picric acid varied significantly with the pH of the solution. It was found that the adsorption capacity is very high in the pH range of 1.4−4.0 and adsorption decreases with increasing pH value. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801716k [article] Adsorption behavior studies of picric acid on mesoporous MCM-41 [texte imprimé] / Hamid Sepehrian, Auteur ; Javad Fasihi, Auteur ; Mohamad Khayatzadeh Mahani, Auteur . - 2009 . - pp. 6772–6775. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6772–6775 Mots-clés : Wastewater  Mesoporous  silicate  MCM-41  Hydrothermal  method  XRD Résumé : The presence of nitrophenols in wastewater is of great environmental concern. In this paper, mesoporous silicate MCM-41 has been prepared by the hydrothermal method and characterized by XRD, the nitrogen adsorption isotherm, and elemental analysis. Adsorption behaviors of 2,4,6-trinitrophenol (picric acid) on the calcined and uncalcined mesoporous MCM-41 adsorbents were studied. The experimental adsorption isotherm was successfully described by the Langmuir model. The pH effect, adsorption kinetics, and breakthrough curves were studied by batch and column methods. The adsorption capacity of picric acid varied significantly with the pH of the solution. It was found that the adsorption capacity is very high in the pH range of 1.4−4.0 and adsorption decreases with increasing pH value. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801716k