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Original Article

ECB. 2013; 2(10): 706-708


CHROMIUM ADSORPTION KINETICS FROM AQUEOUS METAL SOLUTIONS USING CHITOSAN

Uzma Nadeem.



Abstract
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The paper discusses the kinetics of chromium(VI) ions adsorption from aqueous solutions using chitosan at 25 oC and pH 5. The
intraparticle diffusion rate constants (Kid and Ci) determined for chitosan are 0.487 mg g-1 min-1(1/2) and 11.66 mg g-1 respectively . The
results shows that the intraparticle diffusion model fits the sorption of chromium(VI) with higher coefficient of determination (R
2
), thereby
indicating the intraparticle diffusion may be rate limiting step for chromium(VI) adsorption. The results from this study indicate that
chitosan is a good adsorbent for the removal of chromium(VI) from wastewater.

Key words: chitosan; intraparticle diffusion rate model; adsorption; chromium(VI); hazardous; wastewater





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