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年度	103	專案性質	實驗性質
專案類別	模場試驗	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	二仁溪污染底泥整治模場試驗計畫(第四年-鄰苯二甲酸酯塑化劑污染底泥之快速檢測與模場試驗
中文關鍵字	鄰苯二甲酸酯；塑化劑；底泥整治；快速檢測；模場試驗；拉曼光譜
專案英文名稱	Remediation pilot study of the contaminated sediments in Er-Ren River (Year 4 -Rapid detection and remediation of phthalate ester-contaminated river sediments)
英文關鍵字	Pthalates; Plasticizers; Sediment remediation; Rapid detection; Pilot study; Raman Scattering
執行金額
執行期間	2013/11/25 至 2014/11/24
計畫中文摘要	鄰苯二甲酸酯（phthalate esters, PAEs）通常用於塑膠製程中充當塑化劑之 用，可增加塑膠製品之撓曲程度與黏性，但具有相當之毒性，因添加方式為物理 性加入，並未形成化學鍵結，於使用時可陸續釋放至空氣、土壤與水體中，造成 人體健康危害。我國目前毒性化學物質管理法所管制 PAEs 即達到 26 種之多，其 中使用量最大的當屬 di-(2-ethylhexyl) phthalate（DEHP），目前台灣居家空氣中塵 粒之塑化劑濃度為全球最高，土壤、底泥與魚體中 DEHP 濃度與世界各國比較均 偏高。以我國二仁溪為例，底泥中 DEHP 濃度在 94 年之最高測值為 26.2 mg/kg（乾 重）為當年所有檢測河川底泥中之最高者，已經超過法規之上限值 19.7 mg/kg（乾 重），有進行整治技術研發之必要。並且鑒於底泥中 PAEs 之檢測分析標準方法曠 日廢時，並且同樣面臨整治效果驗證之困難性。先期之二仁溪與三爺溪沿岸底泥 採樣分析結果顯示，4 種受法規規範之 PAEs 有 2 種平均濃度已經超過底泥品質指 標上限值。第一階段模場試驗結果顯示二仁溪底泥中微生物對 DEHP 之降解能力 的確比國際間之試驗結果為佳，其半生期為國際文獻數值之 1/20 至 1/30 之間；第 二階段模場試驗則顯示現場風化之 PAEs 以 BBP 最容易回收，以總去除率而言，乳 化液與釋氧劑添加之工程干預仍是較佳之方案，但在 DEHP 為主要污染物且為風 化型態時應謹慎使用；未進行積極整治與源頭管理，PAEs 塑化劑在二仁溪底泥中 濃度可能會繼續升高。表面增強拉曼光譜用奈米金薄膜之方式進行 SERS 檢測後，靈敏性與專一性經過 40 樣品測試後均可達 100%，方法偵測極限為 6.67 mg/L，若 以萃取液進行檢測，應可達到 0.67 mg/kg 之法偵測極限。
計畫英文摘要	River sediments play an imperative role in ecosystems, such as self-cleaning capacity, planktonic habitat, and benthic organismal habitat. Once contaminated by persistent organic pollutants (POPs), the contaminant may enter human body or other organisms through food chains resulting adverse health effects and detriment of ecosystems. Taking Er-Ren River as an exampleaccording to the literatures, it is heavily polluted. In its sediment, PAEs, especially di-(2-ethylhexyl) phthalate (DEHP), are above the regulated standard. However, a cost-effective in-situ remediation technology does not exist yet. In the lab, the half-lives of the four regulated PAEs under aerobic conditions are less than 1 month but much longer under anaerobic conditions, which is the prevailing condition in river sediments. For example, the half-life of DEHP in sediment is as long as 347 days. Since sediment is the ultimate accumulation environmental media of PAEs, successful remediation of PAEs in sediments will substantially cut down the mass of PAEs in our surroundings and contribute greatly to the health of human. This project is aimed to remove PAEs in river sediment by implementing a pilot study at the Er-Ren River in the southern Taiwan. To meet the demand of rapid detection and quantification of DEHP in river sediment, suface-enhanced Raman scattering (SERS) detection technology is continuously developed in this research project. The results indicate that the current PAEs concentration in Er-Ren River sediment exceeds the historical values indicating the river may be polluted more heavily in recent years. Result on pilot study showed that engineering intervention may be better than natural recovery and emulsion-recovery operation yielded the best result. If DEHP is the predominant contaminant and weathered, emginnering intervention should be assessed before implementation. Method of detection limit of SERS can reach down to 6.67 mg/L in solvent extract of DEHP which could be interopretted as 0.67 mg/kg in sediment. This result indicated that SERS is probably feasible on rapid detection of DEHP in river sediments. It is recommended that PAEs concentration in Er-Ren river sediment should be monitored and the health risk should be assessed in the near future.