Benzoic acid was adsorbed on activated carbon under varying conditions such as time, pH and degassing temperature. Equilibrium adsorption was established within four hours. The pH was found to have considerable effect on adsorption. Increase in degassing temperature had a significant effect on adsorption of benzoic acid. Various possible reasons for change in adsorption with pH and increase degassing temperatures are discussed in detail. Freundlich and Langmuir equations were successfully applied to the adsorption isotherm data of benzoic acid.
M A KHAN ,IHSAN ULLAH ,Y IQBAL ,
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