Interfacial tension of hydrocarbon + different pH aqueous phase systems in the presence of triton X-100 / Javad Saien in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3228–3235 Titre : Interfacial tension of hydrocarbon + different pH aqueous phase systems in the presence of triton X-100 Type de document : texte imprimé Auteurs : Javad Saien, Auteur ; Somayeh Akbari, Auteur Année de publication : 2010 Article en page(s) : pp. 3228–3235 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Interfacial Hydrocarbon Hydrocarbont pH Aqueous Triton X-100 Résumé : The influence of adsorption of low amounts (1.00 × 10−8−2.33 × 10−5 mol·L−1) of Triton X-100 and hydroxyl ion (appropriate to the practical pH range of 6.00−9.37) on the interfacial tension of two recommended systems for liquid−liquid extraction investigations, toluene−water and cumene−water, at 25.0 °C is studied. Solutions with a maximum relative standard deviation in concentration of ±1% have been used; meanwhile, the uncertainty for measured interfacial tensions is ±0.03 mN·m−1. From the data and in agreement with the commonly used Szyszkowski model, a much higher adsorption effectiveness, but a lower adsorption tendency, for Triton is concluded. The influence of Triton in lowering interfacial tension is significantly weakened by hydroxyl ions. Meanwhile, the estimated interfacial composition and interaction parameter (using the theory of nonideal interactions in binary mixtures) are strongly dependent on the bulk mole fraction. The hydroxyl ion shows maximum adsorption at the bulk mole fractions around 0.50 and 0.60, where a high rate of mass transfer could be expected. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900402u [article] Interfacial tension of hydrocarbon + different pH aqueous phase systems in the presence of triton X-100 [texte imprimé] / Javad Saien, Auteur ; Somayeh Akbari, Auteur . - 2010 . - pp. 3228–3235. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3228–3235 Mots-clés : Interfacial Hydrocarbon Hydrocarbont pH Aqueous Triton X-100 Résumé : The influence of adsorption of low amounts (1.00 × 10−8−2.33 × 10−5 mol·L−1) of Triton X-100 and hydroxyl ion (appropriate to the practical pH range of 6.00−9.37) on the interfacial tension of two recommended systems for liquid−liquid extraction investigations, toluene−water and cumene−water, at 25.0 °C is studied. Solutions with a maximum relative standard deviation in concentration of ±1% have been used; meanwhile, the uncertainty for measured interfacial tensions is ±0.03 mN·m−1. From the data and in agreement with the commonly used Szyszkowski model, a much higher adsorption effectiveness, but a lower adsorption tendency, for Triton is concluded. The influence of Triton in lowering interfacial tension is significantly weakened by hydroxyl ions. Meanwhile, the estimated interfacial composition and interaction parameter (using the theory of nonideal interactions in binary mixtures) are strongly dependent on the bulk mole fraction. The hydroxyl ion shows maximum adsorption at the bulk mole fractions around 0.50 and 0.60, where a high rate of mass transfer could be expected. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900402u

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