Adsorption Thermodynamics of Stearic Acid Onto Bentonite

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dc.contributor.authorDemirbas, Ayhan
dc.contributor.authorSarı, Ahmet
dc.contributor.authorIsıldak, Ömer
dc.date.accessioned2020-03-26T17:03:00Z
dc.date.available2020-03-26T17:03:00Z
dc.date.issued2006
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractAdsorption equilibrium of stearic acid onto natural bentonite with Turkish origin was studied at the temperatures of 298, 308 and 318 K. SEM and XRD analysis show that the bentonite used as adsorbent is composed of microcrystal and porous structure. The specific surface area was determined by BET method as 38.6 m(2)/g. The adsorption of stearic acid onto bentonite was conformed to the Langnmuir and Freundlich isotherms. The equilibrium parameter, R-L revealed that the bentonite is a good adsorbent for stearic acid. The sorption capacity of bentonite studied decreases with increasing temperature. However, it is concluded that the adsorption capacity of bentonite for the stearic acid under the same experimental conditions is in comparable level in terms of that of the rice husk ash given in literature. Thermodynamic parameters, Delta G degrees(ads), was calculated to be between -21.8 and -22.8 kJ mol(-1). Delta H degrees(ads) and Delta S degrees(ads) were found to be -9.2 kJ mol(-1) and 42.4 J mol(-1) K-1, respectively. These parameters obtained as a function of temperature indicate that the adsorption of stearic acid onto bentonite was a spontaneous and an exothermic process. An FT-IR study on the adsorbed material was used to verify the interaction of the stearic molecule with bentonite after adsorption process.en_US
dc.identifier.citationDemirbas, A., Sarı, A., Isıldak, Ö., (2006). Adsorption Thermodynamics of Stearic Acid Onto Bentonite. Journal of Hazardous Materials, (135), 226-231. Doi: 10.1016/j.jhazmat.2005.11.056
dc.identifier.doi10.1016/j.jhazmat.2005.11.056en_US
dc.identifier.endpage231en_US
dc.identifier.issn0304-3894en_US
dc.identifier.issn1873-3336en_US
dc.identifier.pmid16386845en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage226en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.jhazmat.2005.11.056
dc.identifier.urihttps://hdl.handle.net/20.500.12395/20311
dc.identifier.volume135en_US
dc.identifier.wosWOS:000239133600032en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorDemirbas, Ayhan
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofJournal of Hazardous Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectAdsorptionen_US
dc.subjectBentoniteen_US
dc.subjectStearic aciden_US
dc.subjectThermodynamic parametersen_US
dc.titleAdsorption Thermodynamics of Stearic Acid Onto Bentoniteen_US
dc.typeArticleen_US

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