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ABSTRACT
The present study shows that the activated carbon is an effective adsorbent for removal of hydrocarbon from water. Adsorption equilibrium followed Langmuir isotherm. The adsorption capacity was 0.664g/gac. The rate of adsorption of hydrocarbon onto activated carbon was initially very high, then was followed by a slower rate and gradually approached a plateau. Although, the pseudo-first-order and pseudo-second-order kinetics models are the simplest models for kinetic modelling of adsorption but in the present system, these models did not fit to experimental data very well and showed deviation from linear plots, but due to the high 2 R value it is said to had followed pseudo-first-order kinetic model. Also, the concentrationdependent rate constant of these models is a disadvantage for them. It also shows that time is an important factor in absorbing the hydrocarbon onto the activated carbon (sawdust) that was used.
