e-ISSN 2231-8542
ISSN 1511-3701

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Cadmium (Cd) Removal from Aqueous Solution Using Microwave Incinerated Rice Husk Ash (MIRHA)

Mohamed Hasnain Isa, Shamsul Rahman Mohamed Kutty, Sri Rahayu Mohd Hussin, Nurhidayati Mat Daud and Amirhossein Malakahmad

Pertanika Journal of Tropical Agricultural Science, Volume 20, Issue 2, July 2012

Keywords: Adsorption, Cadmium (Cd), kinetic, isotherm, microwave incinerated rice husk ash (MIRHA)

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The presence of heavy metals in aquatic systems has become a serious problem. Heavy metals can haveadverse effects on the environment as well as on human health. As a result, much attention has beengiven to new technologies for removal of heavy metal ions from contaminated waters. In this study,Microwave Incinerated Rice Husk Ash (MIRHA), a locally available agricultural waste, was used for theremoval of Cd (as a representative heavy metal) from synthetic wastewater by batch adsorption process.The effects of pH, initial metal concentration, and contact time on Cd removal efficiency were studied.pH 4 was found to be the optimum. The removal efficiency was found to be correlated with the initialmetal concentration and contact time between adsorbent and adsorbate. Cd adsorption kinetics followedthe pseudo-second-order model and implied chemisorption. The adsorption equilibrium of Cd can bewell described by the Freundlich isotherm model.

ISSN 1511-3701

e-ISSN 2231-8542

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