Effects of mixed metal ions on the photodegradation of metamifop

Photodegradation is one of develop system that believed to be capable of destroying compound suitable for reducing the concentration of pesticides in the wastewater. The system can be utilized for organic compounds treatment which can lead to complete mineralization under the optimum conditions. However, the heavy metal can influence the photodegradation of organic pollutants in aqueous solution. The purpose of this study is to identify the impact of mixed metal (Fe(II), Cu(II), Zn(II)) ions on the photodegradation of metamifop. Hence, to monitor the degradation efficiency of the system, the residual concentrations of these organic compounds and metal ions were analyzed using high performance liquid chromatography (HPLC) and UV-Visible spectrometer (UV-Vis). The data show that the presence of mixed metal ions on the photodegradation of metamifop is greatly increased the degradation values. It was identified that, photodegradation of 5 ppm of metamifop in the presence of 5 ppm mixed metal ions achieved 71.51% degradation and 10 ppm of mixed metal ions achieved 96.32% degradation respectively. The hydrogen peroxide was also added into metamifop solution in order to identify the effect on the photodegradation of metamifop in the presence of mixed metal ions. The result indicated that the presence 5 ppm of H2O2 was achieved 68.81% degradation and further addition of 10 ppm of H2O2 was drastically dropped to 29.82%. Basically, the presence of mixed metal (Fe(II), Cu(II), Zn(II)) ions on metamifop solution was given a positive feedback in which it help to increase the degradation process of metamifop as expected. However, there is no significant beneficial is observed when hydrogen peroxide is added to metamifop solution.