Volume No. 9 Issue No.: 3A Page No.: 864-871 January-March 2015




Singh B. K.* and Nema Pragya

Department of Chemistry, Government M. H. College of Home Science and Science, Autonomous, Jabalpur, Madhya Pradesh (INDIA)


Received on : October 04, 2014




Adsorption technique is widely used for removal of toxic organic contaminants from aqueous streams. Although commercial activated carbon is an effective adsorbent, its widespread used is restricted due to its high cost and substantial lost during regeneration. The aim of this study is to investigate the possibility of fly ash as an alternative adsorbent for phenol removal from aqueous solution. The removal characteristics of para-chlorophenol from aqueous solution by fly ash were investigated under various conditions of contact time, particle size, pH concentration and temperature. The level of uptake of para-chlorophenol by fly ash decreased with increasing particle size and pH but increases with temperature. Rate constants for different conditions were evaluated in terms of first-order kinetics. The experimental results underlined the potential of fly ash for recovery of para- chlorophenol from waste water. The main mechanisms involved in the removal of para-chlorophenol from solution by fly ash were electron with drawing effect of chloro group of benzene ring and adsorption at the surface of the fly ash. It was found that these low cost fly ash adsorbent demonstrated good removal capability of phenol and hence can be used economically on large scale


Keywords : Fly ash, Para-chlorophenol, Adsorption, Kinetics, First order kinetics