Gasoline Compounds Removal from Wastewater by UV& UV/H202 Process

Most of the synthetic organic chemicals and naturally occurring substances, enter the aquatic medium in several different ways and, according to their water solubility, can be transported and distributed in the water cycle. The effluents of urban wastewater treatment plants are among the major responsible for the release of this kind of contaminants into the environment. Although conventional biological processes are usually efficient for the degradation of pollutants occurring in wastewater, refractory compounds are not effectively removed. In such cases the use of Advanced Oxidation Processes (AOPs) may improve the overall removal efficiency of such compounds. In the Past two decades, advanced oxidation processes (AOPs) have been proven to be powerful and efficient treatment methods for degrading recalcitrant materials or mineralizing stable, inhibitory, or toxic contaminants. Advanced oxidation processes are those groups of technologies that lead to hydroxyl radical (_OH) generation as the primary oxidant (second highest powerful oxidant after fluorine). Hydroxyl radicals are non-selective in nature and they can react without any other additives with a wide range of contaminants. These hydroxyl radicals attack organic molecules by either abstracting a hydrogen atom or adding a hydrogen atom to the double bonds. It makes new oxidized intermediates with lower molecular weight or carbon dioxide and water in case of complete mineralization.