Increasing The Effectiveness Of Pb (II) Ion Removal From Aqueous Media Using Fenton Method At Near Neutral pH By Adding Dicarboxylic Acid As A Chelating Agent

In this study, the Fenton process modified with dicarboxylic acid as a chelating agent for reducing Pb (II) ions at neutral pH has been studied systematically. The Fenton process was carried out by interacting Fe2+ and H2O2 ions (Fenton’s reagent) with Pb (II) ions in water using a batch technique. The parameters studied in the Fenton process are the effect of the concentration of oxalic acid and succinic acid, reaction time, and the effect of pH on Pb (II) ion oxidation effectiveness. In addition, the ability of oxalic acid and succinic acid to increase the effectiveness of Pb (II) ion oxidation was compared. The results showed that the addition of oxalic acid and succinic acid in the Fenton process could enhance the oxidation of Pb (II) ions at pH 7, in which the ability of succinic acid was higher than that of oxalic acid. The oxidation of 30 mg/L Pb (II) ion in 20 mL solution reached the optimum effectiveness at 82.13 and 97.06 in the presence of oxalic and succinic acid, respectively. This effectiveness can be achieved using 0.05 M dicarboxylic acid concentration at pH 7 and 60 minutes. Furthermore, the Pb (II) ion oxidation produced PbO2 solid and follows the first-order reaction kinetics model. © The Author(’s).