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Adsorption dynamics; chitosan; pH; fraction of adsorption; intraparticle diffusion; co-ions

Batch equilibration studies are conducted to determine the nature of adsorption of zinc (II) over chitosan. The factors affecting the adsorption process like particle size, contact time, dosage, pH, effects of chloride and nitrate are identified. The influence of temperature and co-ions on the adsorption process is verified. The fraction of adsorption,Y_t and the intraparticle diffusion rate constant,k_p are calculated at different environments and the results are discussed. The nature of adsorption of the zinc (II)-chitosan system is explained using Freundlich, Langmuir isotherms and thermodynamic parameters

G Karthikeyan¹ K Anbalagan¹ N Muthulakshmi Andal¹

1. Department of Chemistry, Gandhigram Rural Institute-Deemed University, Gandhigram - 624 302, India

Published

March 2004

Manuscript received

3 June 2003

Manuscript revised

12 November 2003