土壤與地下水污染整治為目前世界環保先進國家所關注的重要議題。其中加油站及石化工業之大型儲油槽及管線老舊腐蝕，油品洩漏機會隨使用年限增加而增加，而油品中BTEX及MTBE為代表性有機污染物，利用亞鐵離子或是鐵氧化物催化過氧化氫產生氫氧自由基的Fenton及Fenton-like反應，常被用來處理受BTEX及MTBE污染的土壤及地下水。本研究以類芬頓反應處理苯及MTBE污染物，首先進行鐵系資材（Iron-based material，IBM）的製備，以其作為類芬頓反應之鐵源，並與鐵氧化物比較評估類芬頓反應釋放氫氧自由基之能力，再以實驗所得較佳反應操作條件，探討兩種鐵系資材IBM（A）及（B）處理含苯及MTBE污染物之效率。
研究結果顯示，IBM（A）及（B）之粒徑主要分布在1.19~4.76 mm之間，主要成分皆以Ca、Si及Fe為主，且含鐵量分別為23.83 wt.%、15.32 wt.%，主要晶相為矽酸鐵、磁鐵礦與氧化亞鐵，在Fe2+及Fe3+的分布上，IBM（A）含有2.8 %的Fe2+及21 %的Fe3+，而IBM（B）含有5 %的Fe2+及10.4 %的Fe3+，因此，IBM具有作為類芬頓反應之鐵源的潛力。另外，本研究所使用的化學探針pCBA對氫氧自由基的專一性相當高，透過pCBA的降解可以間接求出氫氧自由基產量，亦即可量測類芬頓反應之氫氧自由基產量。在鐵氧化物系統中，較佳的反應條件為在鐵氧化物添加劑量100 g/L，H2O2濃度23.52 mM，氫氧自由基釋放能力為FeO > Fe3O4 > Fe2O3；而鐵系資材系統中，較佳的反應條件為在鐵系資材添加劑量250 g/L，H2O2濃度23.52 mM，氫氧自由基釋放能力為IBM（A）> IBM（B）。以Rct值大小評估Fenton-like系統之氫氧自由基轉換效率，結果為FeO > IBM（A）> IBM（B）> Fe3O4 > Fe2O3。
在污染物去除方面，鐵氧化物較佳操作條件為添加量100 g/L，H2O2添加濃度23.52 mM，在不調整pH值，反應時間4小時，此時FeO、Fe3O4、Fe2O3對苯的去除率分別為98%、64%、45%，而對MTBE的去除率分別為46%、24%、19%；而IBM較佳操作條件為添加量250 g/L、H2O2添加濃度23.52 mM，在不調整pH值、反應時間4小時，此情況下IBM（A）、IBM（B）對苯的去除率分別為65%、55%，而對MTBE的去除率分別為47%、33%。綜合以上結果，IBM（A）、（B）具有做為透水性催化牆材料應用於苯及MTBE污染物處理之淺力。

One of the most common sources for BTEX and MTBE contamination of soil and groundwater are spills involving the release of petroleum products such as gasoline, diesel fuel and lubricating and heating oil from leaking oil tanks. Fenton-like reaction is a soil and groundwater chemical oxidation remediation technology derived from Fenton reaction. This remediation technology is achieved by using iron oxides to catalyze H2O2 and produce free hydroxyl radicals to destroy the organic pollutants in the soil and groundwater. The pCBA was used as a•OH-probe compound in this study. Monitoring the change in concentration of the•OH-probe compound provides an indirect measurement of the•OH concentration. BETX and MTBE are used as target pollutant, hoping to investigate the relationship between the releasing efficiency of OH free radicals and the removal efficiency of BTEX/MTBE. Results from this research showed IBM was suitable for the Fenton-like reactions because of their high iron content. The releasing efficiency of system OH free radicals can be discussed with pCBA pseudo-first-order model. It can tell from the result that the transient steady-state OH free radical concentration of pure iron oxides is greater than IBM (A). The reaction efficiency of IBM (A) is significantly greater than IBM (B). The optimal conditions of the releasing efficiency of OH free radical, the benzene removal rate of FeO, Fe3O4, Fe2O3, IBM (A) and (B) were 98%, 64%, 45%, 65% and 55% respectively, while the MTBE removal rate of FeO, Fe3O4, Fe2O3, IBM (A) and (B) were 46%, 24%, 19%, 47% and 33% respectively.

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