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

Author(s)

de Farias, Ana Beatriz Vitorino ; da Costa, Talles Barcelos ; da Silva, Meuris Gurgel Carlos ; Vieira, Melissa Gurgel Adeodato

• Document type: Journal article
• Source: International Journal of Biological Macromolecules; v. 241, p. 11-pg., 2023-06-30.

Abstract

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)

• FAPESP's process: 17/18236-1 - RECOVERY OF NOBLE METALLIC IONS AND RARE-EARTH IONS FROM AQUEOUS SOLUTIONS BY BIOADSORTION IN PARTICLES PRODUCED FROM SERICINE AND ALGINATE BLENDS
• Grantee: Melissa Gurgel Adeodato Vieira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/11353-8 - Brazilian Water Research Center (BWRC)
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Grants - Research Centers in Engineering Program