Abstract

M. T. Uddin*, M. Rokanuzzaman, M. S. I. Mozumder, M. M. R. Khan and M. A. Islam

Batch sorption experiments were carried out to remove As(III) from aqueous solution by using iron based commercial adsorbent Bayoxide. The effects of various experimental parameters, such as initial concentration, contact time and solution pH on the adsorption of As(III) on adsorbent was investigated. The adsorption density increased with increased initial arsenic concentration and contact time. The suitability of Langmuir and Freundlich adsorption models to the equilibrium data was investigated for As(III)-adsorbent system. The results showed that equilibrium data fitted Langmuir model best. The monolayer sorption capacity was 7.88 mg/g. Adsorption data were modeled using the pseudo-first-order and pseudo-second-order kinetic equation. It was shown that the secondorder kinetic equation could best describe the sorption kinetics.

Bayoxide; adsorption; isotherm; kinetics; pH

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