Synthesis, characterization and determination of the metal ions adsorption capacity of cellulose modified with p-aminobenzoic groups
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Data
2004-06
Autores
Castro, Gustavo Rocha De [UNESP]
Alcântara, Ilton Luiz De [UNESP]
Roldan, Paulo Dos Santos [UNESP]
Bozano, Dorotéia De Fátima [UNESP]
Padilha, Pedro De Magalhães [UNESP]
Florentino, Ariovaldo De Oliveira [UNESP]
Rocha, Julio Cesar [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
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.
Descrição
Palavras-chave
modified cellulose, separation of heavy metals, preconcentration, adsorption, p-aminobenzoic groups
Como citar
Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 7, n. 2, p. 329-334, 2004.