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年度	104	專案性質	實驗性質
專案類別	研究專案	研究主題	底泥
申請機構	國立中興大學	申請系所	環境工程學系
專案主持人	張書奇	職等/職稱	副教授
專案中文名稱	現地底泥整治技術研發－磁性活性碳吸附移除、電磁感熱玻璃化與粒徑分離技術研究
中文關鍵字	底泥,污染物,整治,磁性活性碳,現址固化,膠凝過濾法
專案英文名稱	Innovative technology development for sediment remediation
英文關鍵字	Sediment, contaminant, remediation, magnetic activated carbon, in situ solidification, gel filtration
執行金額	1,240,000元
執行期間	2014/12/1 至 2015/11/30
計畫中文摘要	台灣地區之底泥污染情況相當嚴重，多項有機污染物與重金屬污染濃度在全世界之監測濃度均名列前茅。針對污染物分布之差異性，本計畫將針對底泥中之重金屬與有機污染物進行磁性活性碳吸附與回收、針對局部高污染成分底泥進行現址玻璃化、針對容易懸浮之微小顆粒底泥則以改良式凝膠過濾法進行去除。現行活性碳添加法因活性碳本身具有漂浮性而可輕易遷移到較低污染或是無污染之底泥區域而釋放出污染物導致污染範圍擴大，故研發磁性活性碳複合材（magnetic activated carbon composite）於完成污染物吸附平衡後立即回收；局部高污染區塊之現址玻璃化（in situ vitrification）技術係針對表層底泥污染物固定提出一快速電磁感應加熱進行底泥現址玻璃化技術研發；現行浚渫法（dredging）往往將具高污染濃度之微小底泥顆粒再懸浮於水相中，沉降後導致表層底泥仍具有高濃度污染而無法達成整治目標，本計畫將利用改良式凝膠過濾法進行現地底泥表層微小顆粒之現地分選（in situ fractionation）。目前計畫依預定進度執行，三項技術研發均已顯現成效，磁性活性碳經證實對砷及汞重金屬具有良好吸附效果且遵循擬二階動力方程式，添加於底泥後之較佳回收時間為1至4小時之間，Aroclor1254之最佳去除率可達81.9%。電磁感應加熱玻璃化之重金屬可固定97.0-100.0%之重金屬，1400°C下直接玻璃化法經測試三處之底泥均能達到標準，進一步改良添加玻璃砂方法可將溫度進一步降至1000°C，經測試三處底泥，也均能達到標準。改良之凝膠已可初步分離粒徑不同之底泥顆粒，對最小粒徑範圍(2.0 µm)去除率約56%，尚未達到理想目標。本計畫已經完成可提供我國底泥整治產業三項新技術，並已完成1篇SCI論文論文投稿，二項專利申請中。
計畫英文摘要	Sediment contamination in Taiwan is an imperative environmental problem. Concentration levels of some organic pollutants and heavy metals are ranked at the front all over the world. Aimed at this uneven distribution of contaminants in sediment, this project will focus on development of three different strategic technologies, i.e., magnetic activated carbon (MAC) for organic contaminant removal, in-situ rapid vitrification for highly contaminated sediment, and modified gel filtration for in-situ fine particle fractionation. Up to now, all three technologies has shown good results. Magnetic activated carbon showed good removal on mercury and arsenic and their adsorption followed pseudo- second order kinetics. The better recovery time interval after MAC addition is between one and four hours and the highest removal of Aroclor1254 was 81.9%. Induction heating showed very good confinement of heacy metals up to 97.0-100.0% stabilization of tested eight heavy metals and have tested on sediment from three samling sites and all passed the regulated limits. A new vitrification method was successfully developed and now vitrifying sediment at 1000°C is feasible. This method has been applied to the sediments from three sampling site and showed all passed the regulated limits. Refined gels can successfully separate the sediment particles into two differnet groups but the efficiency need to be further improved. Up to now, all have been implemented and one SCI paper is submitted and two invention patents are filing application. The proposed three new technologies are proved to be feasible as in situ remediation options.