跳到主要內容 :::

年度	102	專案性質	實驗性質
專案類別	研究專案	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	教授
專案中文名稱	電動力技術處理重金屬污染土壤模場試驗設計第二代現地模場及建立土本化技術
中文關鍵字	電動力；三維模場
專案英文名稱	The pilot plant study of heavy metal contaminated soil by Electrokinetic (EK) process – designing the 2nd generation in-situ pilot plant and establishing local EK technology in Taiwan.
英文關鍵字	electrokinetic
執行金額
執行期間	2012/12/10 至 2013/12/9
計畫中文摘要	電動力技術係一現地(in-situ)整治技術，可藉由調整電動力操作參數及處理時間，使得地面活動及原有建物不受影響，且因具備外在驅動力及污染物擴散方向可控制之特點，特別適合應用於大多技術不適合處理之黏土層污染。其主要優勢為：(1)可產生均勻之電滲透流於異質且低滲透性之土壤介質中移動，(2)可有效控制電滲透之流向，(3)高降解率與移除率且具安全性，(4)為一種高經濟效益之現地永續處理技術。落實實場整治，建立本土現地操作參數，將可有效解決現有污染場址之技術瓶頸。 本計畫以100年度補助計劃成果為基礎，進行持續性研究。今年度(102)計劃重點為改良100年度設計之第一代三維現地模場，就其材質厚度、出水口位置、組裝方式及電極棒（板）規格進行改良，完成第二代三維現地模場之規劃設計，並進行電動力實驗參數之完整測試，以建立電動力技術之本土化操作參數。第二代模場尺寸建立為1m (L) × 0.5m (W) × 0.7 m (H)，電極材質變更為鈦板電極。結果顯示，實驗後Zn、Cu、Pb、Cr及Ni金屬去除率為15.1~88.6 %、50.8~84.4 %、35.1~99.5 %、57.4~89.0 %及28.8~77.9 %；其中又以Test 2(電位坡降0.35 V/cm，操作流質濃度0.05 M乳酸，整治時間20天)之去除率表現最佳；結果發現，槽液及土壤溫度主要受電位坡降、室溫及操作流質溫度影響，本研究四組實驗月份皆為夏季(6-9月)進行，其槽液體及土壤最高溫度分別為50.0±2 ℃及50.0±0.49 ℃，若運用於實場整治時，則可藉延長整治時間降低電位坡降，降低溫度變化，且藉調整操作流質溫度可更直接且有效控制槽液及土壤溫度變化。 本研究處理成本主要考量監測設備購置費用及操作費用(電極、操作流質及電能)，結果顯示每處理一立方公尺土壤合計之花費約新台幣26,999~38,342元；電極佔總成本費之 67-95 %，操作流質為 5-33 %，電費約 2 %，電極耗損為主要造成成本增加之因素，第二代模場改以耐腐蝕性較佳之鈦板為電極，可較以不鏽鋼棒為電極之第一代模場節省約 14 %成本耗損；於本研究電動力三維模場實驗中發現，主要去除機制為藉電滲透流及離子遷移將污染物往陰極移動去除，本研究之槽液及土壤 pH 值、電流密度變化、陰陽極槽液體電導度分析及處理機制分析於本文中有較詳盡之敘述與討論。
計畫英文摘要	Electrokinetic (EK) process is classified as an in-situ remediation technology. It will be conducted in site without disturbing present resident activities with proper operation and reasonable treatment time. EK process is much fit in contaminated site with clay soil because pollutant will be forced to migrate by the electrical driving force. The advantages EK process includes： (1) production of uniform electroosmosic flow in heterogenous medium, especially in low permeable soil; (2) easy control of flow direction; (3) high removal and degradation efficiency; (4) high economy. To establish pilot-scale operation parameters will be beneficial to promote in application The 2nd generation 3-D pilot-scale EK modul was redesigned based on the 1st 3-D pilot-scale EK modul by improvement of thickness, position of reservoirs effluent, and electrode material. The size of the 2nd generation 3-D modeul is about 1 m (L) x 0.5 m (W) x0.7 m (H) and the performance of titanium electrode plate was investigated. The removal efficiency of Zn, Cu, Pb, Cr, and Ni were 15.1~88.6 %、50.8~84.4 %、35.1~99.5 %、57.4~89.0 %, and 28.8~77.9 %, respectively, which was achieved with 0.05M lactic acid under 0.35 V/cm of potential gradient for 20 days. Results showed that the temperatures of reservoir and soil were 50.0±2℃及50.0±0.49℃, which could be reduced by prolonging treatment duration, decreasing potential gradient and lowering procession fluid temperature. By consideration of monitoring instrumental fee and operation fee (electrode, processing fluid, and electricity) for the 2nd generation 3-D pilot-scale EK modul, the treatment fee is 26,999~38,342 NTD/m3 , which accounted for 67-95 % of electrode, 5-33 % of processing fluid, and 2% of electricity. The treatment fee of the 2nd generation 3-D pilot-scale EK modul was 14% cheaper than the 1st generation 3-D pilot-scale EK modul. Results also indicated that the metals were majorly removed to cathode reservoir by electrosmosis flow and ion migration. The pH of soil and reservoir, current density, and reservoir conductivity were also investigated in this study.