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dc.creatorPINHEIRO, Marta Helena Tavares-
dc.creatorLEMOS, Vanda Porpino-
dc.creatorDANTAS, Kelly das Graças Fernandes-
dc.creatorVALENTIM, Taynara Lima-
dc.date.accessioned2014-10-03T12:04:37Z-
dc.date.available2014-10-03T12:04:37Z-
dc.date.issued2013-
dc.identifier.citationPINHEIRO, Marta Helena Tavares et al. Especiação e quimissorção de Pb(II) em rejeito de caulim. Química Nova, São Paulo, v. 36, n. 2, p. 272-278, 2013. Disponível em: <http://www.scielo.br/pdf/qn/v36n2/v36n2a13.pdf>. Acesso em: 18 jun. 2014. <http://dx.doi.org/10.1590/S0100-40422013000200013>.pt_BR
dc.identifier.issn0100-4042-
dc.identifier.urihttp://repositorio.ufpa.br/jspui/handle/2011/5826-
dc.description.abstractThis study assesses the adsorption of Pb(II) on natural kaolin waste (KRnatural) and on that treated with 3 mol L-1 H2SO4 and HCl. Equilibrium and thermodynamic parameters were determined. The results indicate that the values of CEC, specific area and SiO2/Al2O3 ratio (4.6-6.0 cmol kg-1, 14.0-16.0 m² g-1 and 1.16-1.30, respectively) vary only slightly for the adsorbents; the concentration of Pb2+ is much higher than that of other species (PbOH+ and Pb(OH) 2). The values of RL, ΔGº, ΔHº and ΔSº are typical of feasible, spontaneous, exothermic and ordered adsorption. The chemisorption on KR natural is more feasible and ordered.pt_BR
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dc.language.isoporpt_BR
dc.rightsAcesso Aberto-
dc.subjectAdsorçãopt_BR
dc.subjectCaulimpt_BR
dc.subjectCaulinitapt_BR
dc.subjectChumbopt_BR
dc.subjectEspeciação (Química)pt_BR
dc.titleEspeciação e quimissorção de Pb(II) em rejeito de caulimpt_BR
dc.title.alternativeSpeciation and chemisorption of Pb(II) on kaolin wastept_BR
dc.typeArtigo de Periódicopt_BR
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