| Texto completo | |
| Autor(es): |
de Farias, Ana Beatriz Vitorino
;
da Costa, Talles Barcelos
;
da Silva, Meuris Gurgel Carlos
;
Vieira, Melissa Gurgel Adeodato
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | International Journal of Biological Macromolecules; v. 241, p. 11-pg., 2023-06-30. |
| Resumo | |
Cerium is an essential element for several applications in industry, therefore, recovering it from secondary sources is a promising strategy from an economic and environmental perspective. For this purpose, biosorption is a low-cost and effective alternative. The present work evaluated the recovery of Ce3+ from aqueous solutions using alginate/vermiculite-based particles (ALEV) functionalized by ionic imprinting. From the kinetic assays, it was verified that the uptake of Ce3+ followed the pseudo-second-order model and was mainly controlled by external diffusion. The Langmuir model better described the equilibrium data, and a maximum biosorption capacity of 0.671 mmol/g at 45 degrees C was attained. The evaluation of the thermodynamic quantities revealed that the process occurs spontaneously and endothermically. The particles reuse and Ce3+ recovery were achieved using 0.1 mol/L HCl or 1.0 mol/L CaCl2 solutions for up to four cycles of biosorption/desorption. The biosorbent was characterized before and posted Ce3+ biosorption to investigate the morphology, textural properties, crys-tallinity, thermal resistance, composition, and functional groups of the biosorbent. (AU) | |
| Processo FAPESP: | 17/18236-1 - Recuperação de íons metálicos nobres e íons terras-raras presentes em soluções aquosas por bioadsorção em partículas de blenda de sericina e alginato |
| Beneficiário: | Melissa Gurgel Adeodato Vieira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/11353-8 - Centro Brasileiro de Pesquisa em Água (BWRC) |
| Beneficiário: | Lauro Tatsuo Kubota |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |