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年度	108	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	程淑芬	職等/職稱	教授
專案中文名稱	製備多硫化鈣及應用於地下水重金屬污染整治技術研發
中文關鍵字	地下水 , 多硫化物 , 重金屬 , 還原 , 穩定
專案英文名稱	Preparation of calci
英文關鍵字	groundwater, polysulfide, heavy metal, reduction, stabilization
執行金額	1,500,000元
執行期間	2018/12/31 至 2019/12/31
計畫中文摘要	地下水重金屬污染的案例國內時有所聞，地下水重金屬污染處理是一個棘手的問題，因重金屬無法分解，可以應用之整治技術相當有限，且一旦污染擴散，污染範圍大，整治經費也相對遽增。地下水重金屬污染目前國內最主要處理方式為抽出處理。抽出處理可以移除重金屬污染物，但當地下水污染分布範圍廣時，抽出處理費用龐大，處理水若無法回注，造成地下水資源的浪費。因此，對於污染源不明確、污染擴散範圍大之場址，採用現地化學穩定處理技術相對較具有經濟效率。 多硫化鈣還原穩定法可同時搭配於抽出處理或現地處理的整治工法。研究團隊於106年度以自行製備的多硫化鈣進行六價鉻的還原穩定研究，結果顯示自製多硫化鈣對六價鉻具有相當高的去除效率。因此，本計畫進一步精進藥劑配製技術，並試驗多硫化鈣對其他重金屬銅、鋅、鎳、鉛、鎘等污染物之適用性與操作條件。另外，藉由污染場址現地試驗建立多硫化鈣現地施用方法。藉由本計畫，從藥劑製備到現地施用方法，建立完整的多硫化鈣整治技術。 本研究包含三個部分：第一部分為藥劑製備技術的精進，針對不同界面活性劑添加，進行藥劑反應效力研究，使藥劑的成效能再進一步優化。第二部分為多硫化鈣適合施用之重金屬污染物研究與最佳操作條件建立。確定多硫化鈣對銅、鋅、鎳、鉛、鎘等各種重金屬的去除效率，以及最佳操作條件，分析多硫化鈣對各種重金屬之去除產物，建立多硫化鈣去除各種重金屬之反應機制，提升多硫化鈣技術的應用範圍。第三部分為現地模場試驗計畫，以台中市大里區光正路地下水污染管制區進行現地模場試驗，藉由自製藥劑施用與成效評估，建立多硫化鈣現地還原穩定法之整治技術。
計畫英文摘要	The cases of heavy metal contamination of groundwater are common in Taiwan. The treatment has remained difficult because the heavy metals cannot be decomposed, thereby limiting the available remediation techniques. Once the pollution disperses, the range of pollution is very extensive, and the remediation expenses increase relatively. At present, the foremost treatment of heavy metal pollution of groundwater is pump and treat. The pump and treat can remove heavy metal pollutant, but when the groundwater pollution distribution range is wide, the cost of pump and treat is huge. If the treated water cannot be backfilled, the groundwater resource is wasted. Therefore, for the sites where the pollution source is uncertain or the pollution disperses in a wide range, the onsite chemical stabilization treatment technique has more economic efficiency relatively. The calcium polysulfide reduction stability method can be combined with the remediation engineering of pump and treat or in situ treatment. The research team used the self-made calcium polysulfide to study the reduction stability of hexavalent chromium in 2017. The results showed that the self-made calcium polysulfide had quite high removal efficiency on hexavalent chrome. Therefore, this project sophisticates the agent preparation technique, and tests the applicability and operating conditions of calcium polysulfide for the other heavy metal pollutants, such as copper, zinc, nickel, lead and cadmium. In addition, the calcium polysulfide field application process is established by the contaminated site test. A complete calcium polysulfide remediation technique is established by agent preparation to field application process of this project. This study comprises three parts. Part 1 is the development and sophistication of agent, the effect of different additives and feed proportioning on the agent reactivity is studied, so that the effect of agent is further optimized, and the product quality verification procedure is established. Part 2 studies the heavy metal pollutants applicable to calcium polysulfide and establishes the optimum operating conditions. The removal efficiency of calcium polysulfide on copper, zinc, nickel, lead and cadmium heavy metals and optimum operating conditions are further determined, the products of removal of heavy metals by calcium polysulfide are analyzed, the reaction mechanism of calcium polysulfide for removing different heavy metals is established, the application field of calcium polysulfide technique is enlarged. Part 3 is the field pilot test plan, the field pilot test is implemented in the groundwater pollution control area, Guangzheng Road, Dali District, Taichung City, the remediation technique of calcium polysulfide field reduction stability method is established by applying the self-made agent and evaluating the effect.