| Texto completo | |
| Autor(es): |
Briao, Giani de Vargas
;
Agostinho, Fernando Antonio
;
Carlos da Silva, Meuris Gurgel
;
Adeodato Vieira, Melissa Gurgel
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Industrial & Engineering Chemistry Research; v. 61, n. 25, p. 10-pg., 2022-06-10. |
| Resumo | |
Dysprosium recovery is essential for the sustainable development of clean energies. The present paper investigates the continuous adsorption and recovery of Dy from aqueous solutions using a fixed bed of expanded vermiculite. The study was divided into operational conditions optimizing, modeling, regeneration and reuse cycles, characterization of the regenerated adsorbent, and column selectivity analysis. Under the best conditions, high breakthrough (q(b)) and equilibrium (q(e)) capacities of 0.31 and 0.42 mmol/g were achieved. The Yan and DualSD models adjusted the data well and can be applied for future scale-up simulations. The fixed bed could operate efficiently, maintaining an average q(b) of 0.31 mmol/g and q(e) of 0.45 mmol/g over the five cycles. The spent adsorbent presented textural properties different from the original, indicating that the desorption steps did not completely regenerate the material. The selectivity toward dysprosium was confirmed since the removal of Dy (82%) was at least twice the adsorption efficiency of Pb (41.1%), Ni (35.7%), Cd, and Cu (similar to 16.5%). Thus, the recovery of dysprosium using a fixed bed of expanded vermiculite is reproductive along with several uses. Also, the material has a natural selectivity with potential for further advancement of engineered adsorbents based on vermiculite. (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 em Engenharia |