In this table, e which represented the quantity of iron deposited onto brick pellets was determined experimentally from the equation [(Ci – Ce)·V]/(1000·mbrick), where Ci was the initial concentration of Fe2+ ions in contact with brick pellets, Ce was that obtained when the system reached the equilibrium state, and mbrick was the mass of brick pellets in interaction with a V(mL) volume of Fe(II) solution; and e was calculated from the mathematiccal treatment of the first-order and second-order kinetics plots drawn