The Malaysian Journal of Analytical Sciences Vol 11 No 1 (2007): 76 – 83

 

 

REMOVAL OF Cr(III) FROM AQUEOUS SOLUTIONS USING ZEOLITE NaY PREPARED FROM RICE HUSK ASH

 

Nik Ahmad Nizam Nik Malek and Alias Mohd Yusof*

 

Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,

 81310 UTM Skudai, Johor, Malaysia.

 

*Corresponding author: alias@kimia.fs.utm.my

 

Abstract

The efficiency of the synthesized zeolite NaY from rice husk ash (RHA) in the removal of Cr(III) from  aqueous solution was studied. Zeolite NaY was synthesized from RHA via seeding technique and the identification of its structure was done by  X-ray diffraction (XRD) technique and the elemental analysis  was carried out by X-ray fluorescence (XRF). The physicochemical properties which were related to the  use of the zeolite NaY as a sorbent was also investigated. The synthesized zeolite NaY has higher cation  exchange capacity (CEC) than the commercial zeolite NaY due to the higher amount of sodium content in the synthesized as well as the lower ratio of silica to alumina. The synthesized zeolite NaY together with the  commercial one as comparison was used in the sorption of the Cr(III) in aqueous solution by batch sorption experiments. The kinetic study showed that the Cr(III) uptake by both zeolites were based on the pseudo second order model. Synthesized zeolite NaY exhibited greater sorption capacities than the  commercial zeolite NaY since the former has higher surface area and cation exchange capacity (CEC) and  lower ratio of silica to alumina which have a tendency to provide more exchange sites.

 

Keywords: Zeolite NaY, Cr(III), Kinetic Study

 

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