of natural environments [2,3]. The direct discharge to the biological
wastewater treatment plant is also ceased the bacteria
activity causing the failure of such a system [4]. However, little
research work has been done to find the practical way to
degrade the organic contaminants and reduce the toxicity of
formaline wastewater. Advanced oxidation processes, such as
UV/H2O2, Fenton and photo-Fenton, show promise as alternative
techniques for the detoxification of wastewaters containing
these toxic substances [5–7].
Photolytic oxidation with hydrogen peroxide possibly occurs
if the organic or inorganic pollutants of wastewater strongly
absorb UV-irradiation [8]. In this process, the contaminants to be
destroyed must absorb the incident radiation and undergo degradation
starting from its excited state [9]. The application of direct
UV photolysis was reported that is suitable to aquatic contaminants,
such as PCE and pesticides [10–12]. The high-energy