Abstract
Volatile organic compounds (VOCs) from the industries have gotten certain attention; specially the o-chlorotoluene has some serious effects on the ecosystem, as well as on the human nervous and respiratory systems. Therefore, the sodium persulfate (PS) solution irradiated by ultraviolet (UV) was proposed to remove the toxic o-chlorotoluene in this study. The present study focused on the removal efficiency of gaseous o-chlorotoluene and degradation mechanisms. The preliminary results revealed that the removal efficiency was mainly favored by PS concentration, initial pH, UV wavelength and power, inlet o-chlorotoluene concentration, and total gas flow rate. The maximal removal efficiency of gaseous o-chlorotoluene was achieved 93.98 % under optimal experimental conditions. In order to reveal the potential degradation mechanisms, EPR analysis confirmed that both OH and SO4•− were detected during the reaction, and SO4•− acted as the dominant radical for gaseous o-chlorotoluene removal. This study demonstrated that the UV/PS process is an efficient method for removing o-chlorotoluene.
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