A study of kinetics of adsorption of lead and nickel ions on the sawdust of Cordia africana

University Science Instrumentation Centre, P.G. Department of Chemistry,

University of Kashmir, Srinagar-190 006, Jammu & Kashmir, India

E-mail : smaa1@rediffmail.com Fax: 91-194-2421357

Manuscript received 12 October 2009. revised 21 January 2010, accepted 8 February 2010

The kinetics of adsorption of lead and nickel Ions on the sawdust of Cardia africana (lam tree) was studied at room temperature and rate constant of adsorption was determined. The pseudo-first order and pseudo-second order kinetic models were used to analyze the adsorption data. The results indicate that adsorption or lead and nickel ions on the sawdust or lam tree follow pseudo-first order kinetics. The interparticle diffusion constants were calculated and It was found that intraparticle diffusion may be the only rate controlling step.