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Modeling, kinetic, and equilibrium characterization of paraquat adsorption onto polyurethane foam using the ion-pairing technique

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dc.contributor.author Vinhal, Jonas O.
dc.contributor.author Lage, Mateus R.
dc.contributor.author Carneiro, Jose Walkimar M.
dc.contributor.author Lima, Claudio F.
dc.contributor.author Cassella, Ricardo J.
dc.date.accessioned 2018-06-04T11:54:01Z
dc.date.available 2018-06-04T11:54:01Z
dc.date.issued 2015-06-01
dc.identifier.issn 03014797
dc.identifier.uri https://doi.org/10.1016/j.jenvman.2015.03.022
dc.identifier.uri http://www.locus.ufv.br/handle/123456789/19896
dc.description.abstract We studied the adsorption of paraquat onto polyurethane foam (PUF) when it was in a medium containing sodium dodecylsulfate (SDS). The adsorption efficiency was dependent on the concentration of SDS in solution, because the formation of an ion-associate between the cationic paraquat and the dodecylsulfate anion was found to be a fundamental step in the process. A computational study was carried out to identify the possible structure of the ion-associate in aqueous medium. The obtained data demonstrated that the structure is probably formed from four units of dodecylsulfate bonded to one paraquat moiety. The results showed that 94% of the paraquat present in 45 mL of a solution containing 3.90 × 10^−5 mol L^−1 could be retained by 300 mg of PUF, resulting in the removal of 2.20 mg of paraquat. The experimental data were reasonably adjusted to the Freundlich isotherm and to the pseudo-second-order kinetic model. Also, the application of Morris–Weber and Reichenberg models indicated that both film-diffusion and intraparticle-diffusion processes were active during the control of the adsorption kinetics. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Journal of Environmental Management pt-BR
dc.relation.ispartofseries v. 156, p. 200-208, Junho 2015 pt-BR
dc.rights Elsevier Ltd. pt-BR
dc.subject Paraquat pt-BR
dc.subject Polyurethane foam pt-BR
dc.subject Adsorption pt-BR
dc.subject Lon-pairing pt-BR
dc.title Modeling, kinetic, and equilibrium characterization of paraquat adsorption onto polyurethane foam using the ion-pairing technique en
dc.type Artigo pt-BR


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  • Artigos [378]
    Artigos Técnico-científicos na área de Química

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