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 $S{O}_4^{•-}$ were detected during the reaction, and $S{O}_4^{•-}$ 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.

来自行业的挥发性有机化合物（VOCs）得到了一定的关注；特别是邻氯甲苯对生态系统以及人类的神经和呼吸系统有一些严重的影响。因此，本研究提出用紫外线 (UV) 照射的过硫酸钠 (PS) 溶液去除有毒的邻氯甲苯。目前的研究重点是气态邻氯甲苯的去除效率和降解机制。初步结果表明，去除效率主要受 PS 浓度、初始 pH 值、UV 波长和功率、入口邻氯甲苯浓度和总气体流速的影响。气态o的最大去除效率-氯甲苯在最佳实验条件下达到 93.98%。为了揭示潜在的降解机制，EPR 分析证实了OH 和$秒{哦}_4^{•-}$ 在反应过程中被检测到，并且 $秒{哦}_4^{•-}$作为气态邻氯甲苯去除的主要自由基。该研究表明，UV/PS 工艺是去除邻氯甲苯的有效方法。