Especiação e quimissorção de Pb(II) em rejeito de caulim
| dc.creator | PINHEIRO, Marta Helena Tavares | |
| dc.creator | LEMOS, Vanda Porpino | |
| dc.creator | DANTAS, Kelly das Graças Fernandes | |
| dc.creator | VALENTIM, Taynara Lima | |
| dc.date.accessioned | 2014-10-03T12:04:37Z | |
| dc.date.available | 2014-10-03T12:04:37Z | |
| dc.date.issued | 2013 | |
| dc.description.abstract | This 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 |
| dc.identifier.citation | PINHEIRO, 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.issn | 0100-4042 | |
| dc.identifier.uri | https://repositorio.ufpa.br/handle/2011/5826 | |
| dc.language.iso | por | pt_BR |
| dc.rights | Acesso Aberto | |
| dc.subject | Adsorção | pt_BR |
| dc.subject | Caulim | pt_BR |
| dc.subject | Caulinita | pt_BR |
| dc.subject | Chumbo | pt_BR |
| dc.subject | Especiação (Química) | pt_BR |
| dc.title | Especiação e quimissorção de Pb(II) em rejeito de caulim | pt_BR |
| dc.title.alternative | Speciation and chemisorption of Pb(II) on kaolin waste | pt_BR |
| dc.type | Artigo de Periódico | pt_BR |