Removal of methylene blue from aqueous solutions onto Bacillus subtilis: determination of kinetic and equilibrium parameters

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dc.contributor.authorAyla, Ayseguel
dc.contributor.authorCavus, Aynur
dc.contributor.authorBulut, Yasemin
dc.contributor.authorBaysal, Zubeyde
dc.contributor.authorAytekin, Cetin
dc.date.accessioned2024-04-24T17:07:53Z
dc.date.available2024-04-24T17:07:53Z
dc.date.issued2013
dc.departmentDicle Üniversitesien_US
dc.description.abstractIn the present study, Bacillus subtilis, a Gram-positive bacteria, was used in dried biomass form as biosorbent for removal of methylene blue (MB) from aqueous solutions. Batch adsorption tests were performed at different contact times, temperatures, pH, adsorbent doses, and initial dye concentration. The adsorption isotherms are described by means of the Langmuir and Freundlich isotherms. It was found that the Langmuir equation fit better than the Freundlich equation. Maximum biosorption capacity was found to be 169.49, 178.57, and 181.82mgg(-1) at 298, 308, and 318K, respectively. The adsorption kinetics of MB could be described by the pseudo-second-order reaction model. The activation energy of the biosorption (E-a) was determined as 11.30kJmol(-1) at initial concentration of 50mgL(-1). Free energy of adsorption (G degrees), enthalpy (H degrees), and entropy (S degrees) changes were calculated to predict the nature of adsorption. The estimated values for G degrees were -21.22, -22.02, and -23.01kJmol(-1) at 298, 308, and 318K, respectively. The enthalpy changes and entropy of adsorption were 5.47kJmol(-1) and 89.43Jmol(-1), respectively. The experimental data obtained in the present study indicate that B. subtilis is a suitable and inexpensive adsorbent which can be used for dye removal in wastewater treatment processes.en_US
dc.identifier.doi10.1080/19443994.2013.791780
dc.identifier.endpage7603en_US
dc.identifier.issn1944-3994
dc.identifier.issn1944-3986
dc.identifier.issue40-42en_US
dc.identifier.scopus2-s2.0-84890126183
dc.identifier.scopusqualityQ3
dc.identifier.startpage7596en_US
dc.identifier.urihttps://doi.org/10.1080/19443994.2013.791780
dc.identifier.urihttps://hdl.handle.net/11468/17067
dc.identifier.volume51en_US
dc.identifier.wosWOS:000327931200022
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherDesalination Publen_US
dc.relation.ispartofDesalination and Water Treatment
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBiosorptionen_US
dc.subjectBacillus Subtilisen_US
dc.subjectMethylene Blue (Mb)en_US
dc.subjectThermodynamic Parametersen_US
dc.titleRemoval of methylene blue from aqueous solutions onto Bacillus subtilis: determination of kinetic and equilibrium parametersen_US
dc.titleRemoval of methylene blue from aqueous solutions onto Bacillus subtilis: determination of kinetic and equilibrium parameters
dc.typeArticleen_US

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