The adsorption capacity of lysozyme (chicken egg white) from aqueous solutions unto silica and polystyrene interfaces was studied at varying lysozyme concentrations and ionic strength. The studies revealed an increase in adsorption capacity with increase in concentration and with maximum adsorption densities of 1.34 x10-6 mol g-1 and 1.57 x10-6 mol g-1 obtained for silica and polystyrene respectively at the maximum concentration studied. The observed adsorption isotherms on both surfaces were well fitted by the Langmuir adsorption isotherm model with maximum adsorption capacities (q max) corresponding to monolayer coverage as 1.60 x 10-6 and 2.72 x 10-6 mol g-1 respectively for silica and polystyrene. Fitting of the data into Langmuir-type isotherm suggested that chemisorption was the predominant mechanism in the adsorption process. Results presented in the limelight of varying ionic strength showed that adsorption capacity decreased with increase in ionic strength onto silica surface while showing no significant effect onto polystyrene surface, thus implying that electrostatic interaction may play a major role in lysozyme adsorption onto the silica surface.
The batch adsorption of cadmium (II) ion from aqueous solution using low-cost adsorbent of biological origin, Afzelia africana shell under different experimental conditions was investigated in this study. The influences of initial Cd (II) ion concentration, initial pH, contact times and temperature were reported. , respectively. The adsorption equilibrium shows that the process followed both Freundlich and Langmuir models with Freundlich giving a better fit for the adsorption data in comparison to the Langmuir model. The fit of the adsorption data into Freundlich model shows that the adsorption process was predominantly a physisorption. The results reveal that cadmium (ll) was considerably adsorbed on the A. africana shell and could serve as an economical method for the removal of cadmium from aqueous solutions. Adsorption of Cd (II) was found to be pH dependent and the results indicate that the optimum pH for its
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.