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年度	113	專案性質	實驗性質
專案類別	模場試驗	研究主題	整治
申請機構	國立高雄大學	申請系所	土木與環境工程學系
專案主持人	袁菁	職等/職稱	特聘教授
專案中文名稱	建立具環境韌性及有效性之電化學地質氧化技術整治系統-含氯有機物污染地下水現地模場試驗
中文關鍵字	韌性整治, 含氯有機物, 地下水, 電化學地質氧化技術
專案英文名稱	Establishing the tenacity and efficiency of an in-situ electrochemical geooxidation system for chlorinated organic compounds remediation in groundwater.
英文關鍵字	tenacity, electrochemical geooxidation technology, in-situ, Mn-Fe/Al electrodes, oxidant slow-release tablets, chlorinated organic compounds.
執行金額	2,911,540元
執行期間	2024/12/13 至 2025/11/30
計畫中文摘要	本計畫為「建立具環境韌性及有效性之電化學地質氧化技術整治系統－含氯有機物污染地下水現地模場試驗」之第二年計畫，應用電化學地質氧化技術進行含氯有機物污染地下水之現地整治，並評估其技術穩定性、反應效能及低碳潛力。計畫整體目標在於建立兼具可持續性、整治效率與能源效益之電化學整治系統，並透過間歇性供電模式與即時監測系統提升現地應用能力與整治安全性。本年度延續前期研究成果，針對現地操作參數進行最佳化，並完成模場系統之整治效能驗證與穩定性測試。整治系統採用Mn–Fe/Al複合氧化電極搭配過一硫酸鹽(PMS)緩釋錠，操作條件設定為電位坡降 0.1 V/cm。為即時掌握整治反應進程及系統穩定性，建置即時監測系統，可連續量測地下水之 pH、氧化還原電位、導電度及溶氧量，作為判別反應區環境變化與系統正常運作之依據。監測結果顯示，陽極區域長期維持 pH 4–6 之酸性條件，符合電解產生 H⁺ 之理論反應；陰極區則穩定於 pH 10–13，顯示水分解產生之 OH⁻ 反應穩定且具可控性。ORP 分佈呈現明顯氧化–還原梯度、導電度顯示離子遷移及電解反應持續進行。溶氧濃度介於 1.5–4.5 mg/L，變化穩定，反映氧氣生成與消耗達動態平衡。整體水質變化趨勢與即時監測資料一致，證實系統反應穩定且具長期運轉能力。污染降解方面，以 EKR7 井為代表，初始 TCE 濃度 0.0598 mg/L 於操作第22天後降至 0.019 mg/L(降解率60.6 %)，第 35 天進一步降至 0.011 mg/L(降解率78 %)；第二階段操作中，即使部分井位因電極損壞或陽極調整導致濃度短暫上升，經修復後仍能迅速恢復反應能力，最終 TCE 濃度均低於監測標準(< 0.025 mg/L)，顯示系統具良好韌性與穩定性。綜上所述，本計畫已成功完成具環境韌性與高效能之電化學地質氧化模場整治系統建置與驗證，證實 Mn–Fe/Al 複合電極結合 PMS 緩釋錠 可在低電位坡降條件(0.1 V/cm)下長期穩定運作，有效降解含氯有機污染物-三氯乙烯，且具備能耗低、碳排減少、反應持續性佳等特點。整體系統不僅提升了污染場址整治效率，展現本技術在永續整治領域的實用性與推廣潛力。未來將持續朝向系統模組化與即時監測整合方向發展，建立標準化操作規範與能源效益評估模式，促進技術制度化與產業應用化。期本技術可望成為含氯有機污染地下水整治的重要低碳綠色解決技術之一。
計畫英文摘要	This project, entitled “Establishing the tenacity and efficiency of an in-situ electrochemical geooxidation system for chlorinated organic compounds remediation in groundwater,” represents the second-year phase of a multi-year program. The project applied the electrochemical geo-oxidation (ECGO) technology for in-situ remediation of groundwater contaminated with chlorinated organic compounds, and evaluated its operational stability, degradation efficiency, and low-carbon potential. The overall objective was to establish an electrochemical remediation system that combines sustainability, high treatment efficiency, and energy optimization, while integrating an intermittent power supply mode and a real-time monitoring system to enhance field applicability and operational safety. During this year, based on the achievements of the previous phase, optimization of field operational parameters, verification of remediation performance, and system stability assessments were successfully completed. The in-situ system employed Mn–Fe/Al composite oxidation electrodes coupled with PMS slow-release oxdiant, operated under a constant electric potential gradient of 0.1 V/cm. To ensure continuous tracking of the electrochemical reactions and system performance, a real-time monitoring system was established, enabling continuous measurement of pH, ORP, EC, and DO in groundwater. These parameters served as key indicators for evaluating reaction-zone variations and system stability. The monitoring results indicated that the anode zone maintained an acidic condition (pH 4–6), consistent with the theoretical production of H⁺ through anodic oxidation, while the cathode zone remained alkaline (pH 10–13) due to OH⁻ generation through water electrolysis. The ORP distribution exhibited a distinct oxidation–reduction gradient, and EC results confirmed continuous ionic migration and electrochemical reactions between electrodes. The DO concentration ranged from 1.5–4.5 mg/L and remained stable throughout the operation, reflecting a dynamic balance between oxygen generation and consumption. The overall water-quality trends were consistent with real-time data, demonstrating that the system operated stably and reliably over long-term conditions. In terms of remediation performance, TCE degradation was used as the representative indicator. In monitoring well EKR7, the initial TCE concentration of 0.0598 mg/L decreased to 0.019 mg/L after 22 days of operation (a 60.6 % removal efficiency) and further declined to 0.011 mg/L after 35 days (a 78 % removal efficiency). During the second operation phase, even when temporary electrode malfunction or anode adjustments caused slight concentration fluctuations, the system quickly recovered after maintenance, and the TCE concentration remained below the regulatory limit (< 0.025 mg/L), demonstrating excellent resilience and operational stability. In conclusion, the project successfully established and validated a resilient and high-efficiency in-situ electrochemical geo-oxidation remediation system, confirming that the Mn–Fe/Al composite electrodes coupled with PMS slow-release oxidants can operate stably under a low electric potential gradient (0.1 V/cm), achieving effective degradation of chlorinated organic pollutants such as TCE. The system exhibited low energy consumption, reduced carbon emissions, and sustained electrochemical activity, thereby improving both remediation efficiency and environmental sustainability. Future development will focus on system modularization and integration with real-time monitoring, establishing standardized operational protocols and energy-efficiency assessment models to promote the industrialization and institutional adoption of the technology. The established ECGO system is expected to become one of the key low-carbon and green technologies for in-situ remediation of groundwater contaminated with chlorinated organic compounds.