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Reference type: Journal
Authors: Su HJ, Chen S, Tan TW
Article Title: Surface active site model for Ni2+ adsorption of the surface imprinted adsorbent.
Publication date: 2007
Journal: Process Biochemistry
Volume: 42
Issue: (4)
Page numbers: 612-619.
DOI: 10.1016/j.procbio.2006.11.013
Alternative URL: http://www.sciencedirect.com/science/article/B6THB-4MNR0KP-1/2/e4e3de1b0982d8d1c496247eca09f3ee

Abstract: In this work, a new surface active site (SAS) adsorption equilibrium model was presented, which explicitly accounted for the H+ competitive adsorption with Ni2+ in adsorption equilibrium. Static adsorption experiments with Ni2+ as a model metal ion were carried out to determine the model parameters, those were, equilibrium constant for Ni2+ (Ka), for H+ (Ks), characteristic number of binding sites for Ni2+ (n), for H+ (a), and the non-imprinted factor (σ). It was found that those model parameters n and a were all constant, and that they all expressed that one active site bound two Ni2+ or two H+, while the non-imprinted factor, σ, was effected by Ni2+ concentration, H+ concentration in solution and imprinted Ni2+ concentration in the preparation. Simulated result was compared with experimental data of the adsorption for Ni2+. It was showed that this model could be well used to predict the adsorption equilibrium for Ni2+ on the surface imprinted adsorbent. And it was demonstrated that the efficacy of the active sites formalism could be used in describing adsorption behavior for Ni2+ on the surface imprinted adsorbent
Template and target information: nickel ion, Ni(II)
Author keywords: Adsorption model, Bioadsorption, Heavy metal ions, Ni2+ surface active site model, Surface imprinted adsorbent


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