PERFORMANCE OF FLYASH AND BAGASSE FOR THE REMOVAL OF ZINC IONS FROM AQUEOUS SOLUTIONS BY ADSORPTION

Akhila Swathanthra P, Basava Rao V V, Pranay Kumar Y, Sreedhar. P

Abstract


Economically feasible adsorbents of bio-origin with more adsorptive capacity are in demand for the removal of heavy metals from waste water. As the heavy metals are perilous to the environment, they should be removed from the industrial effluents before their disposal. Zinc is one of the most hazardous heavy metals, widely used in metal alloys and zinc industries. Therefore we propose flyash and bagasse as potential low cost adsorbents for the removal of zinc. Present research mainly focuses on the removal of zinc ions from aqueous solutions. A series of experiments were conducted in batch wise to estimate the effect of system variables on the amount of percentage removal of zinc from the aqueous solution. The effect of variables such as contact time, pH, initial concentration of zinc in solution, amount of adsorbent dosage and temperature of the solution on the adsorption were studied. The adsorption data were well fitted by Freundlich isotherm model for flyash and Langmuir isotherm model for bagasse. Flyash and bagasse showed 89% and 98% removal of zinc at the optimum operating conditions.


Keywords


Zinc, flyash and bagasse, adsorption, Langmuir, Freundlich

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