全氟及多氟烷基化合物因具有穩定的碳–氟鍵，在環境中不易分解，且可能經由工業廢水處理廠放流水進入水環境中，造成長期污染風險。本研究以非對稱電容去離子技術去除水中 PFAS，並使用活性碳作為電極材料，探討不同 CDI 配置、操作參數及實際廢水基質對去除效果之影響。 研究結果顯示，在 100 ppb PFOA 水樣中，ACDI 之去除效果優於傳統 CDI 與 MCDI。於無背景離子條件下，ACDI 對 PFOA 去除率可達 96 % 以上；加入 NaCl 模擬實際放流水導電度後，ACDI 仍可維持 83 % 去除率，高於 MCDI 的 60 % 與 CDI 的 48 %。綜合實驗結果，ACDI 系統在去除效率與操作能耗方面皆具有較佳表現， 操作參數方面，1.2 V 為本研究較佳操作電壓，PFOA 去除率可達 91 %；流速於 50–100 mL/min 範圍內對去除率影響不大。電極厚度增加對去除率提升有限，而增加電極對數則可有效提升去除效果，其中四對電極可使 PFOA 去除率達 98 %。此外，純水中PFOA 在 100 ppb 濃度下維持 89%–94 % 的高去除率； PFHxS比起PFOA略低了一些，去除率在100 ppb 濃度下為 69 %。 實際放流水測試結果顯示，民生、紡織及電鍍放流水中的共存離子、有機物與金屬成分會影響 ACDI 對 PFAS 的去除表現，使去除率低於純水系統。整體而言，ACDI 相較於傳統 CDI 與 MCDI 更適合用於 PFAS 去除，尤其在含背景離子的水質條件下仍具有較佳表現。然而，實際廢水基質仍會影響系統效能，未來仍需進一步評估電極穩定性、再生效率及濃排水後續處理方式。;Per- and polyfluoroalkyl substances (PFAS) are difficult to degrade in the environment due to their stable carbon–fluorine bonds， and they may enter aquatic environments through industrial wastewater treatment plant effluents， posing long-term pollution risks. In this study， asymmetric capacitive deionization (ACDI) was applied to remove PFAS from water， using activated carbon as the electrode material. The effects of different CDI configurations， operating parameters， and real wastewater matrices on PFAS removal were investigated. The results showed that ACDI exhibited better PFOA removal performance than conventional CDI and MCDI in 100 ppb PFOA solutions. Under the condition without background ions， ACDI achieved more than 96% PFOA removal. After adding NaCl to simulate the conductivity of real effluent， ACDI still maintained a removal efficiency of 83%， which was higher than MCDI (60%) and CDI (48%). Overall， the experimental results indicate that the ACDI system showed better performance in terms of both removal efficiency and energy consumption. For the operating parameters， 1.2 V was found to be the preferred operating voltage in this study， with a PFOA removal efficiency of 91%. The flow rate showed limited influence within the range of 50–100 mL/min. Increasing electrode thickness provided only limited improvement in removal efficiency， whereas increasing the number of electrode pairs effectively enhanced PFOA removal. With four electrode pairs， the PFOA removal efficiency reached 98%. In addition， PFOA maintained high removal efficiencies of 89%–94% at 100 ppb in pure water， while the removal efficiency of PFHxS was slightly lower than that of PFOA， reaching 69% at 100 ppb. Tests with real effluents showed that coexisting ions， organic matter， and metal species in domestic， textile， and electroplating effluents affected PFAS removal by ACDI， resulting in lower removal efficiencies than those observed in pure water. Overall， ACDI was more suitable for PFAS removal than conventional CDI and MCDI， especially under water conditions containing background ions. However， real wastewater matrices still affected system performance. Therefore， electrode stability， regeneration efficiency， and the subsequent treatment of concentrated brine should be further evaluated in future studies.
