e-ISSN 2231-8526
ISSN 0128-7680
Mohamed Hasnain Isa, Shamsul Rahman Mohamed Kutty, Sri Rahayu Mohd Hussin, Nurhidayati Mat Daud and Amirhossein Malakahmad
Pertanika Journal of Science & Technology, Volume 20, Issue 2, July 2012
Keywords: Adsorption, Cadmium (Cd), kinetic, isotherm, microwave incinerated rice husk ash (MIRHA)
Published on:
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 0128-7680
e-ISSN 2231-8526