Synthesis, characterization and determination of the metal ions adsorption capacity of cellulose modified with p-aminobenzoic groups

• Autor(a) principal: Castro, Gustavo Rocha de
• Data de Publicação: 2004
• Outros Autores: Alcântara, Ilton Luiz de, Roldan, Paulo dos Santos, Bozano, Dorotéia de Fátima, Padilha, Pedro de Magalhães, Florentino, Ariovaldo de Oliveira, Rocha, Julio Cesar
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMS
• Texto Completo: https://repositorio.ufms.br/handle/123456789/583; http://dx.doi.org/10.1590/S1516-14392004000200018
• topic: Celulose; Metais Pesados; Adsorção; Cellulose; Metals, Heavy; Adsorption

This paper describes the synthesis and characterization of p-aminobenzoic modified cellulose (Cell-PAB), as well as the separation and preconcentration of Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) ions from an aqueous medium using a Cell-PAB bath and the column technique. The quantity of p-aminobenzoic groups attached to the cellulose surface, i.e., 1.81±0.04 mmol/g, was determined by elemental analysis. The FT-IR spectra of Cell-PAB revealed characteristic bands of p-aminobenzoic groups, indicating the desired functionalization of the cellulose surface. The adsorptive capacities for the metals (Ns) Cd, Cu, Ni, Pb and Zn (Ns) were, respectively, 1.72 ± 0.02, 1.96 ± 0.02, 1.88 ± 0.04, 2.01 ± 0.03 and 1.93 ± 0.03 mmol/g. Metal separations performed in flow experiments using a column packed with 1 g of Cell-PAB and 5 mL of 1.5 mol/L HCl solution as eluent achieved an almost 100% metal ions recovery rate.