Volume No. 3 Issue No.: 1 Page No.: 220-227 July-Sept 2008

 

ADSORPTION OF CADMIUM METAL ION (Cd2+) FROM ITS AQUEOUS SOLUTION BY ALUMINIUM OXIDE AND KAOLIN : A KINETIC AND EQUILIBRIUM STUDY

 

Tushar Kanti Sen*1 Meimoan Velyny Sarali2

1. Department of Chemical Engineering, Curtin University of Technology, Perth GPO BOX U1987, 6845 (WESTERN AUSTRALIA)
2. Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh Perak, Dural Ridzuan, (MALAYSIA)

 

Received on : March 17, 2008

 

ABSTRACT

 

In this work, the effects of various experimental parameters on kinetics and equilibrium adsorption of cadmium metal ion (Cd2+) from its aqueous solution on aluminium oxide (Al2O3) and kaolin have been investigated using laboratory batch adsorption experiments. It has been found that amount of adsorption of cadmium metal ion increases with initial metal ion concentration, contact time, solution pH, amount and type of adsorbents respectively Kinetics data are best described by pseudo-second order model for both the systems. The experimental equilibrium data are fitted to the Freundlich and Langmuir isotherms and find out suitability of both adsorption isotherm.

 

Keywords : Cadmium adsorption, Isotherm, Aluminium oxide, Kaolin adsorbent

 

 

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