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.
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