STERIC MASS ACTION MODEL FOR LACTOFERRIN ADSORPTION IN CRYOGEL WITH IMMOBILIZED COPPER IONS

AUTOR(ES)

Carvalho, B. M. A., Silva Júnior, W. F., Carvalho, L. M., Minim, L. A., Carvalho, G. G. P.

FONTE

Braz. J. Chem. Eng.

DATA DE PUBLICAÇÃO

2016-03

RESUMO

Abstract Parameters of equilibrium adsorption obtained from experiments using immobilized metal affinity chromatography (IMAC) were used to evaluate the applicability of the steric mass-action (SMA) model to describe the adsorption of lactoferrin to cryogel resin under different conditions. The adsorption of lactoferrin on continuous supermacroporous cryogel with immobilized Cu2+ ions was evaluated in batch adsorption experiments at different pH (6-8) and temperature (293-313 K) values. Estimated values of the equilibrium constant (K) and characteristic number of binding sites (n) showed that these parameters decreased with increasing ionic strength, pH and temperature, while the nonlinear parameter, the steric factor (σ), increased with increasing ionic strength and temperature. Expressions correlating these parameters with pH, ionic strength and temperature were then derived.

Documentos Relacionados

• Adsorção de lactoferrina em coluna supermacroporosa de criogel de poliacrilamida ativada com íons de cobre
• Adsorption of lead and copper ions from aqueous effluents on rice husk ash in a dynamic system
• Copper adsorption in tropical oxisols
• Produção e caracterização de quitosana imobilizada em substratos visando adsorção de ions metalicos
• A role for residue 151 of LamB in bacteriophage lambda adsorption: possible steric effect of amino acid substitutions.