Adsorption of azo dye on activated carbon prepared from waste wood: 2. equilibrium | [Journal of Chemical Society of Pakistan • 2010]

Author(s):

1. Sultan ALAM: Department of Chemistry, University of Malakand, Chakdra, Dir(L), PAKISTAN

2. Fazal MABOOD: Department of Chemistry, University of Malakand, Chakdra, Dir(L), PAKISTAN

3. Mohammad SADIQ: Department of Chemistry, University of Malakand, Chakdra, Dir(L), PAKISTAN

4. Noorulamin NULL: Department of Chemistry, Abdul Wali Khan University, Mardan, PAKISTAN

5. BANGASH Fazlullah Khan: Institute of Chemical Sciences, University of Peshawar, Peshawar, PAKISTAN

Abstract:

The present study was designed to investigate the effect of activation temperature on carbon prepared from the wood of Salvadora oleoides. The samples were characterized. Activation at 800ºC is higher due to the decrease in polarity of the carbon surface, resulted from the decomposition of some of the acidic oxygen surface functionalities. Increase in adsorption rate was observed for higher temperature activated sample due to the increase in the surface area and opening of the blind pores and the increase in pore volume. Lower rate of dye adsorption on sample activated at 400ºC may be due to the fact that polar functional groups situated at the pore opening have adsorbed water strongly through hydrogen bonds that in turn has resulted in the pores constriction or blockage. Freundlich, Langmuir, DR isotherm, and distribution coefficient models were used to compare the efficiency of the carbon activated at different temperature (400, 800ºC). The data generated from all isotherms, show that 800ºC activated sample has greater dye adsorption capacity.

Page(s): 695-703

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 32, Issue: 6, Year: 2010

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