Oxidative decomposition of oxalate ions in water solutions of concentrated ozone

The objective of this work is to study the oxidative decomposition of oxalate ions by concentrated ozone in water solutions under different conditions. The changes of the oxalate ion and ozone concentrations and the pH of solutions as functions of the ozonation time are determined. It is shown that oxalate ion decomposition proceeds most efficiently in an alkaline medium. The temperature dependence of the oxalate ion oxidation is determined to be extreme. The maximum effectiveness of the process depends on the pH of the medium: 50A degrees C at pH = 10 and 70A degrees C at pH = 2. The effect of the ozone concentration in an ozoneoxygen mixture on the effectiveness of the oxidation of oxalic acid is studied. It is shown that as the ozone concentration increases the time required for oxidation of oxalic acid decreases proportionally. The ozone consumption on oxidative decomposition of 1 g oxalic at different pH and temperatures of the solution is established. It is shown that the ozone consumption on the oxidation of oxalic acid has a minimum at 50-60A degrees C.