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Kinetics and Mechanism of removal of Phenol from Aqueous Solutions withFlyash

Author Affiliations

  • 1Deptt. of Chemistry, Govt. M.H. College of H. Sc. and Science, Autonomous, Jabalpur, M.P., INDIA

Res.J.chem.sci., Volume 5, Issue (1), Pages 78-82, January,18 (2015)

Abstract

Adsorption technique is widely used for removal of toxic organic contaminants from aqueous streams. Although commercialactivated carbon is an effective adsorbent, it’s widespread used is restricted due to its high cost and substantial lost duringregeneration. The aim of this study is to investigate the possibility of flyash as an alternative adsorbent for phenol removalfrom aqueous solution .The removal of phenol from aqueous solution by flyash were investigated under various conditions ofontact time, particle size, pH, concentration and temperature. The level of uptake of phenol by flyash decreased withincreasing particle size and pH but increases with temperature. Rate constants for different conditions were evaluated interms of first-order kinetics. The study is followed the pseudo-first-order rate kinetics and is found that the sorption data fitwell the Lagergren equation.The main mechanisms involved in the removal of phenol from solution by flyash were theinteraction between lone pair of electron present on oxygen atom of OH group of the phenol and the silica an d aluminapresent as major constituent at the surface of the flyash. It was found that these low cost flyash adsorbent demonstratedgood removal capability of phenol and hence can be used economically on large scale.

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