RESEARCH ARTICLE

 

Kinetics of the adsorption of bovine serum albumin of white wine model solutions onto activated carbon and alumina

 

 

Omoniyi K. Israel^{I, *}; Patricia A. Ekwumemgbo^II

^ISchool of Basic and Remedial Studies, Ahmadu Bello University, Funtua, Nigeria
^IIDepartment of Chemistry, Ahmadu Bello University, Zaria, Nigeria

 

 

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ABSTRACT

This study investigates the kinetics of adsorption of bovine serum albumin, BSA, in white wine model solutions onto activated carbon, AC, and alumina, AL. Pseudo-first order and pseudo-second order models were applied to determine the rate and mechanism of adsorption of the white wine protein during the haze removal process. The results showed that the average amount of adsorbed BSA onto AC was 1.10 ± 0.07 times higher than that onto AL. Statistical analysis by two-way ANOVA showed no significant difference in the amount of BSA adsorbed onto the two adsorbents, but a statistically significant difference existed in the amount adsorbed by variation of incubation time. A positive correlation exists between the amounts of BSA adsorbed onto AC and AL. The kinetics of the adsorption were found to be based on the assumption of an intra-particle diffusion-controlled pseudo-second order mechanism, with adsorption rate constants being higher at lower adsorbate concentrations.

Keywords: White wine, haze removal, kinetic modelling, adsorption rate constant

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Acknowledgement

The authors gratefully acknowledge Professor Lori A. Joseph, Department of Chemistry, Ahmadu Bello University, Zaria, Nigeria, for providing BSA, and most importantly, for stimulating research work on the present topic.

 

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Received 7 November 2008
Revised 2 February 2010
Accepted 20 March 2010

 

 

* To whom correspondence should be addressed. E-mail: israelflourish@yahoo.com