Degradation of Malachite Green (MG) Under Uv and Uv With H2O2 Processes

Abstract

Advanced oxidation processes (AOPs), defined as those technologies that utilize the hydroxyl radical (OH) for oxidation, have received increasing attention in the research and development of wastewater treatment technologies in the last decades. These processes have been applied successfully for the removal or degradation of toxic pollutants or used as pretreatment to convert recalcitrant pollutants into biodegradable compounds that can then be treated by conventional biological methods. The efficacy of AOPs depends on the generation of reactive free radicals, the most important of which is the hydroxyl radical (OH). Here we summarize the formation reactions of OH and the mechanisms of dye degradation. In this study, we used methods using H2O2 and UV lamps to degrade Malachite Green where we carried out numerous trials on the Advance oxidation process. The stock solution of Malachite Green was prepared as 0.1 g/L in the first phase. Then, using the stock solution, we prepared further the standard solutions. The Vis-Spectrophotometer was then used to determine how well various solutions absorbed light. The dye was then exposed to various amounts of H2O2, and the absorption was once more measured at various time intervals. After this Malachite Green (MG) was treated with various concentrations of pH and ions and the %degradation was measured repeatedly.

Keywords: Advanced Oxidation Processes (AOPs), Malachite Green Degradation, Hydroxyl Radicals (OH), Hydrogen Peroxide (H₂O₂), UV Photodegradation