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Adsorptive Removal of Phenols from aqueous solution by Flyash- Kinetics and Equilibrium Study

Author Affiliations

  • 1Dept. of chemistry, Govt. M. H College of H.Sc. and Science, Autonomous, JabalpurMP, INDIA

Int. Res. J. Environment Sci., Volume 4, Issue (8), Pages 60-73, August,22 (2015)

Abstract

The potentiality of low cost abundantly available material with good adsorption properties for removing phenols is investigated. The adsorbent is characterized using a number of experimental approaches like chemical analysis, XRF, XRD, FTIR and SEM /EDS. Chlorophenols i.e. o-chlorophenol (OCL). m-chlorophenol (MCL) p-chlorophenol(PCL) including phenol (PHL) are selected for the studies. The effect of various factors like adsorbent particle size. pH, phenols concentration and temperature on the adsorption p are investigated. The removals of different phenols are increased with decreasing adsorbent particle size, pH and increasing concentration and temperature. The adsorption of the chlorophenols and phenols studied followed first-order rate kinetics. Langmuir adsorption isotherm constants are calculated and it is seen that the adsorption data for phenols onto flyash fitted the Langmuir model well. Thermodynamic studies are also undertaken and the values of the various parameters such as standard free energy (G°), enthalpy (H°) and entropy () are calculated.

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