Abstract

Candida rugosa lipase was immobilized on the activated nylon-6 membrane using 0.5% glutaraldehyde as cross-linking agent. The immobilized lipase had an improved temperature and pH stability and exhibited good reusability. The adsorption process followed pseudo-second order rate equation and the biosorption isotherms correlated well with the Langmuir isotherm model. Negative ΔG indicated the adsorption process was spontaneous and the positive ΔH indicated that the adsorption was endothermic. The standard entropy ΔS value was also positive, which suggested an increase in the freedom of the system.

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