Cerium biosorption onto alginate/vermiculite-based particles functionalized with ionic imprinting: Kinetics, equilibrium, thermodynamic, and reuse studies.

Autor: de Farias ABV; University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, Brazil., da Costa TB; University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, Brazil., da Silva MGC; University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, Brazil., Vieira MGA; University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, Brazil. Electronic address: melissag@unicamp.br.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2023 Jun 30; Vol. 241, pp. 124542. Date of Electronic Publication: 2023 Apr 20.
DOI: 10.1016/j.ijbiomac.2023.124542
Abstrakt: 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 Ce 3+ from aqueous solutions using alginate/vermiculite-based particles (ALEV) functionalized by ionic imprinting. From the kinetic assays, it was verified that the uptake of Ce 3+ 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 °C was attained. The evaluation of the thermodynamic quantities revealed that the process occurs spontaneously and endothermically. The particles reuse and Ce 3+ recovery were achieved using 0.1 mol/L HCl or 1.0 mol/L CaCl 2 solutions for up to four cycles of biosorption/desorption. The biosorbent was characterized before and posted Ce 3+ biosorption to investigate the morphology, textural properties, crystallinity, thermal resistance, composition, and functional groups of the biosorbent.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Declarations.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: