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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Palladium adsorption on natural polymeric sericin-alginate particles crosslinked by polyethylene glycol diglycidyl ether

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Author(s):
da Silva, Thiago Lopes [1] ; Carlos da Silva, Meuris Gurgel [1] ; Adeodato Vieira, Melissa Gurgel [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Sch Chem Engn, Albert Einstein Av, 500, BR-13083852 Campinas - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 9, n. 4 AUG 2021.
Web of Science Citations: 0
Abstract

The use of palladium (Pd) is growing and its scarcity, high price and the pollution generated in its mining motivate the development of research on its removal from effluents. In this work, the use of particles produced from waste sericin and alginate blend crosslinked by polyethylene glycol diglycidyl ether for Pd adsorption was evaluated by means of kinetic and equilibrium studies, thermodynamic parameters and characterization analyses. Sericin is a protein, present at Bombyx mori cocoons, which is discarded in the silk yarn process. Because of its chemical characteristics, the protein can form blends, as with alginate, a polysaccharide present in brown algae. The produced particles are macroporous with amorphous structure and surface area of 5.2 m(2)/g. In kinetics, removals above 97% were achieved from 0.5 mmol/L Pd solution (pH 2.5-3.0) with better pseudo-second order rate law fitting. The Langmuir model was better fitted to the equilibrium, but the surface has been proved to be energetically heterogeneous. External mass transfer resistance has proved to be the limiting step of adsorption. Chemisorption and physisorption are involved at metal uptake and maximum adsorbed capacities were 0.157, 0.191 and 0.249 mmol/g, at 25, 40 and 55 degrees C, indicating the feasibility of the adsorbent use for Pd removal/recovery. (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