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年度	105	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	中原大學	申請系所	環境工程系
專案主持人	趙煥平	職等/職稱	教授
專案中文名稱	醇類增加有機物揮發應用於受柴油污染場址之研究
中文關鍵字	醇類，揮發，柴油，空氣注入法
專案英文名稱	Volatilization increase through addition of alcohol for removal of diesel fuel in the sites of soil-water contaminantion
英文關鍵字	Alcohol, volatilization, diesel, air-sparging
執行金額	916,000元
執行期間	2015/11/17 至 2016/11/16
計畫中文摘要	空氣注入法與土壤蒸氣萃取法均為土壤地下水受到有機物污染時常見的處理方法，但可惜的是受限於有機物的揮發速率，常需要花費許多時間才能達到整治目標，若能有效增加有機物之揮發量，則能提高空氣注入法與土壤蒸氣萃取法之處理效率，本計畫延續去年以醇類加入增加高揮發性有機物之研究成果，今年改以揮發較低的柴油組成物為揮發測試對象，研究可分成兩部分，一部分以柴油組成中個別的有機物進行揮發測試，了解加入醇類後對這些有機物揮發所產生之影響，第二部分為直接以柴油樣品進行測試，評估加入醇類後揮發量增加比例。 在本研究中選擇三種醇類包括正戊醇、正己醇與正庚醇進行實驗，醇類濃度目前設定為2、6、10ppm三種濃度，個別測試揮發的化合物包括C9~C14的烷類，另一部分則直接以市售柴油進行測試，實驗時間依據有機物的性質設定為3小時至63小時不等，揮發出的有機物以商用吸附管吸收，再以二硫化碳萃取後注入氣相層析儀分析揮發出的質量，再與未加入醇類時進行比較。 研究結果顯示加入醇類確實可使所選擇有機物的揮發效率增加，但由於柴油組成之污染物具低水解度在設定條件下已形成非水相液體(NAPL)，因此揮發量增加的比例大部分低於兩倍，且由於形成NAPL的有機物較難混合均勻，因此實驗將產生較大的偏差，當以未加入土壤、加入一般有機質的蘆竹土與加入高有機質的彰化土進行比較，土壤有機質仍會對有機物在土壤中的傳輸產生抑制，但抑制效果不如高揮發性有機物明顯，在揮發增加比例變化趨勢方面，由於污染物已呈現NAPL形式，因此無法完全呈現穩定的趨勢，整體而言加入醇類仍可視為改善空氣注入法效率的方法之一。 關鍵字: 醇類、揮發、柴油、空氣注入法
計畫英文摘要	Air sparging (AS) and soil vapor extraction (SVE) are widely used to remediate contaminated soil and groundwater for the contamination of organic compounds. When the target contaminants are low volatile organic compounds, it would be a very long schedule to finish the remediation process. If a method was developed to enhance volatilization of organic compounds, it would improve the removal efficiency of organic contaminant. This study continued the previous project and, diesel fuel with the lower volatility was selected to examine the increase in volatilization of organic compounds by adding alcohol to groundwater. The volatilization experiment in this study was divided into two parts, including individual organic compounds and diesel fuel sample. The increase in volatile amount was evaluated as presence of alcohols in the soil-water system. These alochols need the properties of relatively lower water soluibilies and higher volatility. Three kinds of alcohols n-pentanol, n-hexanol and n-heptanol were selected to carry out the experiments. The target organic compounds including C9~C14 alkane and diesel fuel was used to examine the result. The concentrations of alcohols with 2, 6, and 10ppm were added in the solution mixing with a target organic compound. The released VOCs were adsorbed by using a commercial adsorption tube. CS2 was used to extract the target organic compound. Furthermore, the extractive solution was injected in GC to analyze the volatile amount of target organic compound. The changes in volatile amounts of organic compounds in alcohol solution were examined. The obtained result including the presence of alcohols could enhance the volatile amounts of test organic contaminants. However, the target organic compounds have formed NAPL caused the lower efficiency in volatilization enhancement. Some of potential bias was ascribed to poor uniform mixing under NAPL condition. Although soil organic matter could reduce transport of organic contaminants in soil, the reduced amounts for the low volatile organic compounds are far lower than those for the high volatile organic compounds. It is difficult to quantify the change in volatile amounts of target organic contaminants under the NAPL condition. The developed method can be used to improve the efficiency of AS in the further.。 Keywords: Alcohol, volatilization, disel fuel, air sparging