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This study investigated the performance of UVC, UVC/ZnO and vacuum UV (VUV) processes for the degradation of diazinon as a model organophosphate pesticide. The highest diazinon degradation was obtained at a solution pH of 5 for UVC, 7.5 for UVC/ZnO, and 9 for VUV. At optimum pH and a reaction time of 30min, the UVC process degraded 57.8% of the diazinon (10mg/L) and the UVC/ZnO process degraded 93...
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