Vipin Kumar Saini - Removal of cadmium and nickel from wastewater using bagasse fly ash - a sugar industry waste

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      Publication Details (including relevant citation   information):

      Published in Water Research, 37(16), 4038-4044(2003). (Impact   factor 4.36 ) (Citations 125)

      Abstract:

      The bagasse fly ash, an industrial solid waste of sugar industry,   was  used for the removal of cadmium and nickel from   wastewater. As much as  90% removal of cadmium and nickel is   possible in about 60 and 80 min,  respectively, under the   batch test conditions. Effect of various  operating   variables, viz., solution pH, adsorbent dose, adsorbate    concentration, temperature, particle size, etc., on the removal   of  cadmium and nickel has been studied. Maximum adsorption   of cadmium and  nickel occurred at a concentration of 14 and   12 mg x l(-1) and at a pH  value of 6.0 and 6.5,   respectively. A dose of 10 g x l(-1) of adsorbent  was   sufficient for the optimum removal of both the metal ions.   The  material exhibits good adsorption capacity and the   adsorption data  follow the Langmuir model better then the   Freundlich model. The  adsorption of both the metal ions   increased with increasing temperature  indicating   endothermic nature of the adsorption process. Isotherms   have  been used to determine thermodynamic parameters of the   process, viz.,  free energy change, enthalpy change and   entropy change.

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