Adsorption of zinc ion (Zn2+) on manganese (IV) oxide (MnO2) in a leclanche dry cell

This work was carried out to study the adsorption of zinc nitrate (Zn(NO3)2) on manganese (IV) oxide (MnO2) in a leclanche dry cell. The aim of the study is to optimize the process for the adsorption of zinc ion on MnO2 in a leclanche dry cell using a second order factorial method. Potentiometric titration method was the adsorption method used. Considering the temperature effect on electric surface charge, pH respond during titration, concentration effect on adsorption and surface charge and the nature of cation, results obtain show that adsorption is inversely proportional to temperature, in other words, as temperature of cation increases, the adsorption capacity on MnO2 decreases at a given concentration. Also at a given temperature adsorption capacity increases as the concentration of the adsorbent increases. The highest adsorption capacity was observed at 0.1M for Zn2+ at 28oC

Author(s): Adejoh Adu Zakariah and Aloko Duncan Folorunsho

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