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年度	110	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	朝陽科技大學	申請系所	環境工程與管理系
專案主持人	章日行	職等/職稱	教授
專案中文名稱	共溶劑及電動力技術實場整治含氯有機物污染之土壤與地下水
中文關鍵字	共溶劑, 電動力, 實場整治, 含氯有機物, 單井流速流向儀
專案英文名稱	A study of real-field remediation for chlorinated organic contaminated soils and groundwater by the co-solvent and electrokinetics technique
英文關鍵字	Co-solvent, Electrokinetics, Real-field remediation, Chlorinated organic, Heat-pulse flowmeter
執行金額	3,680,000元
執行期間	2021/1/1 至 2022/12/31
計畫中文摘要	本計畫新穎性為結合單井流速流向量測、共溶劑及電動力技術實場整治含氯有機物污染之土壤與地下水的創新複合技術。創新技術主軸為採用單井流速流向量測技術取得場址中詳細的地下水流場，進而有利掌握可能殘留的含氯溶劑污染源位置；同時，共溶劑(乙醇)添加至地下水中，提升地下水對於含氯有機物的溶解能力，共溶劑乙醇亦可產生生物反應降解含氯有機物；最後，電滲透流促進此溶解相污染物於土壤層及地下水層之移動，藉由地下水抽除即可有效移除土壤及地下水之含氯有機物。此外，低濃度的含氯有機物可透過共溶劑及電動力法產生之生物反應降解含氯有機物，最終使污染場址的地下水質符合國家管制標準；抽除的地下水再經設置之廢水處理設施處理後迴流，建立一套完整的土壤及地下水整治系統。透過一系列試驗後，可有效釐清結合單井流速流向量測、共溶劑及電動力技術處理含氯有機物污染土壤及地下水的處理效率及操作參數問題，最後探討在此整合技術下的整治效果及本技術所需的整治費用。 本計畫整治設備安裝及期程符合計畫進度，污染改善工程、定期監測與成效評估皆按照計畫書規劃項目執行，其整治內容、檢測項目與期程皆符合計畫進度。截至目前，期末報告成果可以歸納如下：  本計畫透過單井流速流向量測、共溶劑、電動力法及廢水處理設施已建立一套完整現地含氯有機物於土壤及地下水之整治系統。經整治後其地下水之pH和電導度能維持穩定狀態。  根據污染場址監測井不同深度量測結果顯示，地下水不同深度平均流速約介於13 cm/day~25 cm/day，可推測本場址應為透水性良好之地形結構。  經模場先導試驗整治後，四氯乙烯濃度已為N.D；三氯乙烯濃度平均去除率可達95%；順-1,2-二氯乙烯及氯乙烯濃度皆已降至地下水監測標準。  污染場址熱區於4個月整治下，所有含氯污染物濃度皆低於監測標準，且主要污染範圍已大幅縮減，顯示本整治技術對於含氯污染物整治的有效性。  本場址地下水之微生物菌種基因檢測，其分析顯示水體中包含Geobacter、Dechloromonas及Sulfurospirllum等優勢菌，應可協助含氯污染物的降解。  本計畫地下水與放流水中重金屬含量的檢測，經檢測證實電動力法操作下不會造成場址地下水及放流水重金屬的污染，可持續進行後續整治操作。  廢水處理設施處理後之放流水含氯污染物濃度皆低於監測標準，可迴流至注藥井(陽極端)達到地下水循環的目標，證實本整治工法設計的可行性。  針對本場址含氯污染物的整治成本，本整治技術約可降低傳統處理方法(土壤挖除法)40%的操作成本，其證實具有實場應用的競爭力。
計畫英文摘要	The novel of this project is an innovative composite technique that combines single-well velocity flow vector measurement, co-solvent, and electrokinetics technique for in-situ treatment of contaminated soil and groundwater by chlorinated organic matter. The main innovative technique is the use of a single-well velocity flow vector measurement technique to obtain a detailed groundwater flow field in the site, which is beneficial to grasp the location of possible residual chlorinated solvent pollution sources; co-solvent (ethanol) is added to groundwater to improve groundwater’s dissolved capacity to chlorinated organic matter The co-solvent ethanol can also produce a biological reaction to degrade chlorinated organic matter; finally, the electro-osmotic flow promotes the movement of the dissolved phase pollutants in the soil and groundwater layer, and the groundwater pumping can effectively remove the soil and groundwater with chlorine organics. In addition, low-concentration chlorinated organics can degrade chlorinated organics through biological reactions generated by co-solvents and electrodynamic methods. Final, to make the groundwater quality of contaminated sites meet national control standards. The pumped groundwater is treated by the wastewater treatment facility and then returned to anodes. Based on the above description, this research project is to establish a treatment technology with rapid, accurate, multi-functional, and economically efficient chlorinated organic matter, which is believed to be an important technical reference for treating contaminated soil and groundwater in the future. After a series of tests, it can effectively clarify the efficiency and operating parameters of the combined single-well velocity flow vector measurement, co-solvent, and electrokinetics technique to treat contaminated soil and groundwater by chlorinated organic matter, such as pollutant range determination, ethanol injection concentration, and frequency, the influence of various electrochemical reactions produced by electrokinetic on the groundwater layer, the influence of biological effects and the control of operation time and so on. Finally, to discuss the remediation effect under this integrated technique and the remediation cost. The experiment of this project is carried out in accordance with the schedule of the plan. At present, the installation of pollution remediation equipment, engineering, regular monitoring, and efficiency evaluation had been completed. The remediation equipment includes remediation wells and monitoring wells, electrodes, power equipment, pumps, and wastewater treatment facilities, and so on. The equipment installation is in line with the planned schedule; the pollution improvement project, regular monitoring, and efficiency evaluation are all implemented in accordance with the plan. Until now, the results of the report can be summarized as follows:  This project has established a complete in-situ remediation system for chlorinated organic matter in soil and groundwater through single-well velocity flow vector measurement, co-solvent, electrokinetic and wastewater treatment facility. After remediation, the pH and conductivity of the groundwater can be maintained in a stable state.  After the model test, the concentration of PCE has reached N.D; the average removal efficiency was 95%; the concentrations of cis-1,2-DCE and VC have dropped to the groundwater monitoring standard.  According to the measurement results of monitoring wells at different depths of the contaminated site, the average flow rate of groundwater is about 13 cm/day~25 cm/day. It can be understood that the site is a topographic structure with good water permeability.  After 4 months of remediation in the hot area of the polluted site, the concentration of all chlorine-containing pollutants is lower than the monitoring standard, and the main pollution area has been greatly reduced.  The genetic testing of microbial strains in the groundwater shows that the water contains dominant bacteria such as Geobacter, Dechloromonas and Sulfurospirllum, which should assist in the degradation of pollutants.  The detection of heavy metal content in groundwater and discharge water of this project has confirmed that the operation of the remediation technique has no heavy metal pollution to the groundwater and discharge water.  The groundwater of the cathode can be effectively degraded after-treatment of the wastewater treatment facility, and all the concentrations of chlorine-containing were below the monitoring standard. The discharged water can be returned to the injection well (anode end) to achieve the goal of groundwater circulation.  For the remediation cost of chlorine-containing pollutants at this site, this remediation technique can reduce the operating cost of the traditional treatment method (soil excavation method) by about 40%, which proves to be a competition for in-field application.