Please use this identifier to cite or link to this item:
https://repositorio.ufpa.br/jspui/handle/2011/5826| metadata.dc.type: | Artigo de Periódico |
| Issue Date: | 2013 |
| metadata.dc.creator: | PINHEIRO, Marta Helena Tavares LEMOS, Vanda Porpino DANTAS, Kelly das Graças Fernandes VALENTIM, Taynara Lima |
| Title: | Especiação e quimissorção de Pb(II) em rejeito de caulim |
| Other Titles: | Speciation and chemisorption of Pb(II) on kaolin waste |
| 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>. |
| 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. |
| Keywords: | Adsorção Caulim Caulinita Chumbo Especiação (Química) |
| ISSN: | 0100-4042 |
| metadata.dc.rights: | Acesso Aberto |
| Appears in Collections: | Artigos Científicos - FAQUI/ICEN |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Artigo_EspeciacaoQuimissorcaoPb.pdf | 1,37 MB | Adobe PDF | View/Open |
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