Removal/destruction of aqueous-phase octachlorodibenzo-p-dioxin (OCDD) and octachlorodibenzofuran (OCDF) via hydrodechlorination process (HDC) is experimentally evaluated over palladium/activated carbon (Pd/AC) catalyst. Pd catalyst is mainly used as active component for effectiveness in removing dioxin from wastewater. Studies on the removal of PCDD/Fs accomplished with HDC reaction in aqueous phase are limited and the influencing factors have not been clarified. In this study, high-concentration OCDD/F are selected as targets, and the effects of solvent and operating temperature on dechlorination efficiency are investigated via experimental tests. The results indicate that the highest hydrodechlorination efficiency is achieved with isopropanol as solvent. The OCDD/F removal efficiency achieved with the solution of 80% isopropanol is higher than that of 50% isopropanol, whereas the destruction efficiency of OCDD/F reveals the opposite trend. Generally, the removal and destruction efficiencies of PCDFs are higher than those of PCDDs. In addition, the activation energies of OCDD and OCDF are calculated with the Arrhenius equation as 24.8 and 23.1 kJ/mol, respectively. Stability tests are conducted with three cycles. Overall, the results indicate that a high performance (≥99%) can be achieved by combining hydrodechlorination with Pd/AC at a temperature range of 303–353 K, demonstrating that Pd/AC has good potential for removing PCDD/Fs from wastewater.

在钯/活性炭（Pd / AC）催化剂上，通过实验评估了通过加氢脱氯工艺（HDC）对八氯二苯并-对二恶英（OCDD）和八氯二苯并呋喃（OCDF）的去除/破坏效果。Pd催化剂主要用作有效成分，可有效去除废水中的二恶英。HDC反应在水相中去除PCDD / Fs的研究是有限的，影响因素尚未阐明。在这项研究中，选择高浓度OCDD / F作为目标，并通过实验测试研究了溶剂和操作温度对脱氯效率的影响。结果表明，以异丙醇为溶剂可获得最高的加氢脱氯效率。用80％异丙醇溶液获得的OCDD / F去除效率高于50％异丙醇，而OCDD / F的破坏效率却显示出相反的趋势。通常，PCDF的去除和破坏效率要高于PCDD。另外，利用Arrhenius方程计算出OCDD和OCDF的活化能分别为24.8和23.1kJ / mol。稳定性测试分三个周期进行。总体而言，结果表明，在303–353 K的温度范围内，加氢脱氯与Pd / AC结合可以实现高性能（≥99％），表明Pd / AC具有从废水中去除PCDD / Fs的良好潜力。PCDF的去除和销毁效率高于PCDD。另外，利用Arrhenius方程计算出OCDD和OCDF的活化能分别为24.8和23.1kJ / mol。稳定性测试分三个周期进行。总体而言，结果表明，在303–353 K的温度范围内，加氢脱氯与Pd / AC结合可以实现高性能（≥99％），表明Pd / AC具有从废水中去除PCDD / Fs的良好潜力。PCDF的去除和销毁效率高于PCDD。另外，利用Arrhenius方程计算出OCDD和OCDF的活化能分别为24.8和23.1kJ / mol。稳定性测试分三个周期进行。总体而言，结果表明，在303–353 K的温度范围内，加氢脱氯与Pd / AC结合可以实现高性能（≥99％），表明Pd / AC具有从废水中去除PCDD / Fs的良好潜力。