This data is consistent with what occurred in the second experiment involving the degradation of methyl orange. As shown in Figure , the highest percent degradation occurred at a pH of 3.0 with a value of 93.9% followed by a degradation of 77.7% at a pH of 2.0. At a pH of 1.0, the percent degradation drastically drops to a value of 0.9%. A drop in percent degradation also occurred in pH values greater than 3 with an inverse relationship between pH and percent degradation. In this case, a pH 3.0 results in the highest production of hydroxyl radicals and execution of the Fenton reaction. These values are consistent with previous research done by and Venkatanarasimha . These values are explained in the discussion section.