Chlorine-based compounds are typical persistent organic pollutants (POPs) that are widely generated in industrial production. This paper reports an effective and rapid pulsed laser irradiation technique for the dechlorination of hexachlorobenzene (HCB), a model pollutant, without additional catalysts or supports. The effects of the laser parameters, including the laser wavelength and power, on the dechlorination efficiency, were also investigated. The optimized results showed that a lower laser wavelength of 266 nm with 10 mJ/pulse power exhibited the highest dechlorination efficiency with 95% within 15 min. In addition, the laser beam effect was examined by designing the direct-pulsed laser single and multipath irradiation system. The results showed that improving the laser beam profile resulted in more than 95% dechlorination efficiency within 5 min. Thus, the dechlorination reaction proceeded much faster as the surface area that the laser beam came in contact with increased due to the multipath system than the single pathway. Gas chromatography identified benzene as the final product of HCB with pentachlorobenzene (PCB), tetrachlorobenzene (TeCB), trichlorobenzene (TCB), dichlorobenzene (DCB), and chlorobenzene (CB) as intermediate products. The mechanism of HCB dechlorination was explained by a comparison of theoretical calculations with the experimental results. The present study reports an advanced technique for the complete dechlorination of chlorobenzenes, which holds great application potential in environmental remediation.

氯基化合物是典型的持久性有机污染物（POPs），在工业生产中广泛产生。本文报告了一种有效且快速的脉冲激光照射技术，用于脱氯六氯苯 (HCB)，一种模型污染物，无需额外的催化剂或载体。还研究了激光参数（包括激光波长和功率）对脱氯效率的影响。优化结果表明，266 nm 的较低激光波长和 10 mJ/脉冲功率表现出最高的脱氯效率，在 15 分钟内达到 95%。此外，通过设计直接脉冲激光单路径和多路径照射系统来检查激光束效应。结果表明，改善激光光束轮廓可在 5 分钟内实现 95% 以上的脱氯效率。因此，脱氯反应进行得更快，因为激光束接触的表面积因多径系统而增加，而不是单径。气相色谱法鉴定出苯是六氯苯的最终产物，五氯苯 (PCB)、四氯苯 (TeCB)、三氯苯 (TCB)、二氯苯 (DCB) 和氯苯 (CB) 是中间产物。通过理论计算与实验结果的比较，解释了六氯苯脱氯的机理。本研究报告了一种先进的氯苯完全脱氯技术，在环境修复中具有巨大的应用潜力。由于多路径系统比单路径系统增加了激光束接触的表面积，因此脱氯反应进行得更快。气相色谱法鉴定出苯是六氯苯的最终产物，五氯苯 (PCB)、四氯苯 (TeCB)、三氯苯 (TCB)、二氯苯 (DCB) 和氯苯 (CB) 是中间产物。通过理论计算与实验结果的比较，解释了六氯苯脱氯的机理。本研究报告了一种先进的氯苯完全脱氯技术，在环境修复中具有巨大的应用潜力。由于多路径系统比单路径系统增加了激光束接触的表面积，因此脱氯反应进行得更快。气相色谱法鉴定出苯是六氯苯的最终产物，五氯苯 (PCB)、四氯苯 (TeCB)、三氯苯 (TCB)、二氯苯 (DCB) 和氯苯 (CB) 是中间产物。通过理论计算与实验结果的比较，解释了六氯苯脱氯的机理。本研究报告了一种先进的氯苯完全脱氯技术，在环境修复中具有巨大的应用潜力。气相色谱法鉴定出苯是六氯苯的最终产物，五氯苯 (PCB)、四氯苯 (TeCB)、三氯苯 (TCB)、二氯苯 (DCB) 和氯苯 (CB) 是中间产物。通过理论计算与实验结果的比较，解释了六氯苯脱氯的机理。本研究报告了一种先进的氯苯完全脱氯技术，在环境修复中具有巨大的应用潜力。气相色谱法鉴定出苯是六氯苯的最终产物，五氯苯 (PCB)、四氯苯 (TeCB)、三氯苯 (TCB)、二氯苯 (DCB) 和氯苯 (CB) 是中间产物。通过理论计算与实验结果的比较，解释了六氯苯脱氯的机理。本研究报告了一种先进的氯苯完全脱氯技术，在环境修复中具有巨大的应用潜力。