REMOVAL OF MALACHITE GREEN DYE FROM AQUEOUS SOLUTION BY USING COAL FLY ASH AS A LOW COST ADSORBENTGOPAL GEHLOT, SANJAY VERMA, SARITA SHARMA AND ASHOK SHARMAAbstract In the present study, the use of low-cost, abundantly available and efficient coal fly ash (CFA) as been studied as an alternative adsorbent to the current methods of removing of malachite green (MG) dye from aqueous solution. The effects of different variables, such as adsorbent dosage, initial dye concentration, contact time and pH were investigated. The rate of dye adsorption increased with increasing adsorbent mass and contact time. This may be due to the reduction in the boundary layer resistance. 120 minute was found to be the optimum contact time for maximum dye removal. Present investigation concluded that, CFA may be applied as a low-cost attractive option for removal of MG from aqueous solution.
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