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Type: Artigo
Title: Equilibrium study of binary mixture biosorption of Cr(III) and Zn(II) by dealginated seaweed waste: investigation of adsorption mechanisms using X-ray photoelectron spectroscopy analysis
Author: Costa, Camila Stefanne Dias
Queiroz, Bruno Galdeano Mello
Landers, Richard
Silva, Meuris Gurgel Carlos da
Vieira, Melissa Gurgel Adeodato
Abstract: The alginate extraction residue (RES) from the Brazilian Sargassum filipendula was successfully employed as biosorbent in this binary equilibrium study, revealing a greater affinity and selectivity for Cr(III) than for Zn(II). Experimental results also revealed that the process is of endothermic nature and well adjusted by Langmuir–Freundlich binary model. The X-ray photoelectron spectroscopy (XPS) analysis revealed that coordination with hydroxyl groups of RES prevailed in Cr removal, followed by carboxyl-metal complexation. As far as Zn(II) is concerned, ion exchange with carboxylate groups of RES was the largest contributor. Nevertheless, scanning electron microscopy coupled with Fourier transform infrared spectroscopy indicated the participation of sulfate functions in a minor degree.
Subject: Alginatos
Troca iônica
Ion exchange
Country: Alemanha
Editor: Springer
Rights: fechado
Identifier DOI: 10.1007/s11356-018-2880-7
Date Issue: 2019
Appears in Collections:IFGW - Artigos e Outros Documentos
FEQ - Artigos e Outros Documentos

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