Biosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibrium

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dc.creatorSeolatto, Araceli Aparecida
dc.creatorMartins, Tatiana Duque
dc.creatorBergamasco, Rosangela
dc.creatorTavares, Celia Regina Granhen
dc.creatorCossich, Eneida Sala
dc.creatorSilva, E. A. da
dc.date.accessioned2018-06-06T11:09:33Z
dc.date.available2018-06-06T11:09:33Z
dc.date.issued2014-03
dc.description.abstractIn this work, the biosorption of Cr3+ and Ni2+ by Sargassum filipendula pre-treated with CaCl2 was studied. Kinetic and equilibrium experiments were carried out for mono- and multi-component solutions in a batch reactor at pH 3.0 and 30 ÂșC. The results from the kinetic experiments showed that Cr3+ adsorbs slower than Ni2+. This behavior was explained by means of a mechanistic analysis, which showed that Cr3+ uptake presented three adsorption stages, whereas Ni2+ adsorption presents only two. The mono-component equilibrium data, along with binary kinetic data obtained from mono-component experiments, showed that, although the kinetics for Cr3+ removal are slower, the biomass had a stronger affinity for this ion. Almost all Ni2+ is desorbed from the biomass as Cr3+ adsorbs. The binary equilibrium data also presented this behavior. The binary data was also modeled by using modified forms of the Langmuir, Jain and Snoeyink, and Langmuir-Freundlich isotherms. However, the prediction obtained presented low accuracy. An alternative modeling with artificial neural networks was presented and the results showed that this technique could be a promising tool to represent binary equilibrium data. The main contribution of this work was to obtain experimental data for Cr3+/Ni2+ adsorption, which is a system rarely found in the literature and that provides information that could be used in process modeling and simulation.pt_BR
dc.identifier.citationSEOLATTO, A. A. et al. Biosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibrium. Brazilian Journal of Chemical Engineering, SĂŁo Paulo, v. 31, n. 1, p. 211-227, Jan./Mar. 2014.pt_BR
dc.identifier.issn0104-6632
dc.identifier.issn1678-4383
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/15147
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentInstituto de QuĂ­mica - IQ (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectAlgal biomasspt_BR
dc.subjectMathematical modelingpt_BR
dc.subjectNeural networkspt_BR
dc.subjectSingle solutionpt_BR
dc.subjectBinary solutionpt_BR
dc.titleBiosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibriumpt_BR
dc.typeArtigopt_BR

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