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Removal of Hexavalent Chromium from Aqueous Solution Using Flame of Forest Seeds

Hegde Rashmi Shridhar, Mala. J, Manishchandra, Bharath. S, Jagadish H Patil

The powdered flame of forest (Butea monosperma) seeds and its activated carbon obtained by pyrolysis was used as biosorbent for the removal of hexavalent chromium from aqueous solutions. The effect of parameters such as the initial metal ion concentration, pH, adsorbent dosage and temperature has been considered in batch tests. More than 99% removal of hexavalent chromium was achieved using crude flame of forest seeds as biosorbent and pyrolysed. The biomass flame of forest seed and carbon obtained by pyrolysing the seeds showed solid capacity of adsorbing chromium from the aqueos solution which emphasizes its importance for the chromium removal. High chromium removal is possible at low pH of about 1, high adsorbent dosage and low initial concentrations. Further, highest chromium removal was possible at moderate temperature of 400C.