Adsorption Of Phenol Using Different Types Of Non-Conventional Adsorbents And Activated Carbon

Abstract

The Adsorption of phenol on activated carbon, acid activated fly ash, saw dust carbon and treated bentonites was investigated to assess the possible use of these adsorbents for the processing of phenolic wastewater. Adsorption capacity has been found for all the adsorbents. The synthetic waste water was used for the experimental work. The performances of these adsorbents were compared with the activated carbon. The adsorbent doses were varied for getting optimum dosage. The percentage removal of phenol is observed to increase, with increase in the adsorbent dose. The isothermal data could be interpreted by Langmuir, Freundlich and Tempkin isotherm equations. Kinetic data has been studied for activated carbon by pseudo first order, pseudo second order equation. For understanding the mechanism of adsorption process Bangham’s equation, Weber Morris model and Lagergren’s model were used. The adsorption process is found second order process and the pore diffusion is rate controlling step.