壓力輔助臭氧處理受燃料油污染之土壤

Pressure-assisted ozonation of fuel-oil contaminated soil

魏廷宇(Wei Ting-Yu)

指導教授 ： 陳庭堅

國立屏東科技大學/工學院/環境工程與科學系所/碩士(2011年)

https://doi.org/10.6346/NPUST.2011.00158

摘要

近年來台灣用油量與日俱增，使得加油站與煉油廠等陸續興建，大大增加了油品外漏與污染發生的機會。臭氧法雖可有效降解污染物，但因臭氧與包覆於土壤顆粒之中的污染物接觸面積有限，使燃料油之去除效率無法達到管制標準以下。
　　本研究使用壓力輔助臭氧處理技術，採用加壓-減壓的循環方式，在不鏽鋼製造之反應槽內注入空氣/臭氧混合氣體，使土壤因快速加壓-減壓而達到分離土壤顆粒效果，並在加壓-減壓過程中產生劇烈擾動，使臭氧能更容易與污染物接觸，增加降解效率，可增加傳統臭氧法的去除燃料油效率。因此本實驗探討在不同試驗條件下壓力臭氧對燃料油之去除效率，為去除受燃料油污染之土壤提供新的可能性。
實驗結果顯示，壓力輔助臭氧法效果快速且去除率明顯。在循環40次、萃取時間5 min、壓力150 psi、臭氧濃度2 %、水溫25 ℃，在4 L反應槽內加入20 g土和400 mL水即可降至法規管制標準以下。加壓-減壓循環次數與反應時間越長，燃料油去除率越好，增加臭氧濃度和水溫可促進壓力輔助臭氧的反應效率增加去除率。

關鍵字

燃料油 ； 加壓-減壓循環 ； 土壤整治 ； 臭氧

並列摘要

Increasing consumption of oil in Taiwan in recent years necessitated construction of refineries and other petrochemical plants. The increasing number of facilities for fuel processing and storage increased incidents of leakage and accidents. Although ozone is capable of removing many organic contaminants, the contact of ozone with entrapped contaminants in sol is often limited, resulting in remediation not meeting regulatory standards.
In this study, pressure-assisted ozonation technique is used to improve treatment effectiveness. The method involves compression and decompression cycles with an ozone/air mixture carried out in a stainless steel tank. The method breaks up soil aggregates to expose the soil contaminants, thereby achieving improved remediation effectiveness. This study has examined removal effectiveness under different conditions and explored the application possibilities of the new approach.
The pressure-assisted ozonation treatment of a soil batch at 20 g in 400 mL of water for 5 min using pressure-assisted ozonation with 40 cycles of pressure 150 psi with 2% ozone in air at room temperature has resulted in effective contaminant removal from soil. Contaminant removal improves with increasing cycles, contact time, solution temperature, and ozone concentration.

並列關鍵字

fuel oil ； compression and decompression cycle ； soil remediation ； ozone

參考文獻

許麗娟，2003，土壤中總石油碳氫化合物(TPHs)檢測之研究，行政院環境保護署環境檢驗所，桃園。

環檢所，2002，超音波萃取法 NIEA M167.00C，行政院環境保護署環境檢驗所，桃園。

Fenton, H. J. H., 1894, “Oxidation of Tartaric Acid in Presence of Iron”, Journal of Chemical Society, Vol. 65, pp.889-910.

Freeman, M., 1998, “Standard Handbook of Hazardous Waste Treatment and Disposal”, 2th Edition., Published by McGraw-Hill, Inc., pp. 2-6.

Haber, F. and Weiss, J., 1934, “The Catalytic Decomposition of Hydrogen Peroxide by Iron Salts”, Proceedings the Royal Society, Vol.147, pp.332–351.