Removal of Arsenic and Lead from Aqueous Solutions by Palm Kernel Cake and Shea Nut Cake Adsorbents

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Author(s) Eric Appiah Agyapong | Mohammed Fuseini | Bernard Fei-Baffoe
Pages 150-155
Volume 4
Issue 3
Date March, 2015
Keywords Arsenic, Lead, Adsorption Capacity, Palm Kernel Cake, Shea Nut Cake
Abstract

The capacity of Palm Kernel Cake and Shea Nut Cake in adsorbing arsenic and lead in mine processed wastewater was studied. Simulated arsenic and lead wastewater samples were prepared and the adsorption capacities of the cakes were studied at varying concentrations of arsenic and lead, and also, at varying masses of the adsorbents. Results of the study show that adsorption capacities of the materials depended on the mass of the adsorbent material, as well as on the concentration of the metals in solution. With a fixed mass of adsorbents, maximum adsorption capacities of 55.2% and 71.4% were attained with Palm Kernel Cake and Shea Nut Cake, respectively, in varying concentrations of As solution. The capacities increased with increase in concentration of As in the wastewater. However, the capacity of adsorption decreased with increasing concentrations of Pb in the wastewater, with maximum values of 88.8 and 98%, respectively for Palm Kernel Cake and Shea Nut Cake. With varying mass of adsorbents in 100 mg/l solution of A s, maximum adsorption capacities were 62.7% and 74%, respectively for Palm Kernel Cake and Shea Nut Cake. Adsorption capacity increased with mass of Shea Nut Cake whereas it decreased with that of Palm Kernel Cake. Again, adsorption capacity increased with mass of Palm Kernel Cake and Shea Nut Cake in 100 mg/l solution of Pb. Thus, Palm Nut Cake and Shea Nut Cake offer a simple, safe and inexpensive way of effectively cleaning-up arsenic and lead contaminated wastewater.

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