Chlorinated aliphatic hydrocarbons (CAHs) are amongst concerning contaminants with high detection in aquifers and soils. This work is focused on removal of tetrachloroethylene and its degradation products through a two-step process including a permeable ZVI column followed by UV/Fe/PDS process. The permeable ZVI column experiments were designed using response surface method with central composite design. Optimum condition of the permeable ZVI column was initial solution pH = 5, 2 mL/min flow and 26 cm column height which brought about 96% dechlorination efficiency. Total iron leach in the column effluent was 0.34 mg/L. The concentrations of CAHs in permeable ZVI column’s effluent were as follows: PCE ≤ 0.08 mg/L, TCE = 0.23 mg/L, cis-1,2-DCE = 0.36 mg/L, VC = 0.34 mg/L. Thus, further treatment step was required to comply with the corresponded standards. Regarding iron leach, a PDS-based advanced oxidation process was applied on the ZVI column’s effluent with focus on cumulative removal of CAHs. Complete removal of CAHs and 79.2% TOC removal were obtained at pH = 6 using 0.75 mM PDS, 6 W UV at 15 min reaction time. In UV/Fe/PDS process, synergy effect of 67% was observed.

氯化脂族碳氢化合物（CAHs）在含水层和土壤中具有很高的检出率。这项工作的重点是通过两步工艺除去四氯乙烯及其降解产物，该工艺包括可渗透的ZVI柱，然后进行UV / Fe / PDS工艺。ZVI渗透柱实验采用响应面法和中心复合设计进行设计。ZVI渗透柱的最佳条件是初始溶液pH = 5，流速为2 mL / min，柱高为26 cm，脱氯效率约为96％。柱流出物中的总铁浸出量为0.34 mg / L。渗透性ZVI柱流出物中的CAH浓度如下：PCE≤0.08 mg / L，TCE = 0.23 mg / L，顺式-1,2-DCE = 0.36 mg / L，VC = 0.34 mg / L。因此，需要进一步的处理步骤以符合相应的标准。关于铁浸出，在ZVI塔的流出物上采用了基于PDS的高级氧化工艺，重点是CAH的累积去除。使用0.75 mM PDS，6 W UV在15分钟的反应时间下，在pH = 6时，可以完全去除CAH，并去除79.2％TOC。在UV / Fe / PDS工艺中，观察到协同效应为67％。