BIOSORPTION STUDY OF Ni2+ AND Cr3+ BY Sargassum filipendula: KINETICS AND EQUILIBRIUM

dc.creatorSeolatto, AA
dc.creatorMartins, TD
dc.creatorBergamasco, R
dc.creatorTavares, CRG
dc.creatorCossich, ES
dc.creatorda Silva, EA
dc.date2014
dc.dateJAN-MAR
dc.date2014-07-30T13:52:20Z
dc.date2015-11-26T17:21:08Z
dc.date2014-07-30T13:52:20Z
dc.date2015-11-26T17:21:08Z
dc.date.accessioned2018-03-29T00:08:40Z
dc.date.available2018-03-29T00:08:40Z
dc.identifierBrazilian Journal Of Chemical Engineering. Brazilian Soc Chemical Eng, v. 31, n. 1, n. 211, n. 227, 2014.
dc.identifier0104-6632
dc.identifier1678-4383
dc.identifierWOS:000333328400020
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/55698
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/55698
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283295
dc.descriptionIn 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 degrees C. 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.
dc.description31
dc.description1
dc.description211
dc.description227
dc.languageen
dc.publisherBrazilian Soc Chemical Eng
dc.publisherSao Paulo
dc.publisherBrasil
dc.relationBrazilian Journal Of Chemical Engineering
dc.relationBraz. J. Chem. Eng.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectAlgal biomass
dc.subjectMathematical modeling
dc.subjectNeural networks
dc.subjectSingle solution
dc.subjectBinary solution
dc.subjectHeavy-metal Ions
dc.subjectAqueous-solutions
dc.subjectActivated Carbon
dc.subjectNeural-network
dc.subjectWaste-water
dc.subjectPretreated Biomass
dc.subjectSugarcane Bagasse
dc.subjectMarine Macroalgae
dc.subjectBinary-systems
dc.subjectNickel Ii
dc.titleBIOSORPTION STUDY OF Ni2+ AND Cr3+ BY Sargassum filipendula: KINETICS AND EQUILIBRIUM
dc.typeArtículos de revistas


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