介孔Fe2O3/SBA-15催化臭氧氧化含酚废水

含酚废水来源广泛自然条件下难以去除，酚类物质毒性大对生态环境和人类生活健康造成了较严重的影响。本文选取了有机废水处理中较为高效的臭氧催化氧化技术，使用臭氧氧源曝气产生大量的含氧自由基，催化氧化降解酚类有机物，同时对活性中心载体进行了优化，选取制备了一类水热稳定性好及机械强度高的多孔材料，使用这些多孔材料对活性中心Fe₂O₃进行了再组装，合成了一系列表面富集Fe₂O₃的SBA-15介孔薄膜材料，由于SBA-15材料较大的比表面积、丰富的孔隙结构、高度分散的活性中心，在臭氧催化氧化含酚废水中取得了较好效果。苯酚溶液初始浓度为100mg/L (COD 238mg/L)、Fe₂O₃(5)/SBA-15催化剂投加量为30g、臭氧气体流量为2mg/min、废水HRT为5min、流量为0.8L/h的条件下，该催化剂能高效连续稳定运行500h不易失活，其COD去除率仍能保持在65%以上，催化剂活性依然保持在83%以上。Fe₂O₃/SBA-15类介孔催化材料在深度处理含酚废水中具有工业化应用潜质。

Catalytic oxidation of phenolic wastewater by O3 over mesoporousFe2O3/SBA-15

Phenolic compounds have a wide range of sources. It is very difficult to remove phenolic compounds from wastewater under natural conditions. Phenolic compounds are highly toxic and have a serious impact on ecological environment and people's health. In the paper, the efficient ozone catalytic oxidation technology for organic wastewater treatment was selected to degrade and oxidate phenolic organic compounds by oxygen radicals, which produced by ozone aeration. The catalyst carriers were selected and optimized. A kind of porous materials with good hydrothermal stability and high physical strength was prepared. The active sites Fe₂O₃ was modified by these supports, which to synthesize a series of SBA-15 mesoporous materials on whose surface Fe₂O₃ film was enriched. The SBA-15 mesoporous materials had very good effect on catalytic oxidation of phenolic wastewater because of its large specific surface area, abundant porous structure and uniform active sites. The materials could run efficiently and steadily for 500h, with the catalytic activity above 83% under the reaction conditions: initial phenol solution concentration of 100mg/L (COD 238mg/L), hydraulic retention time of phenolic wastewater of 5min, quantity of flow 0.8L/h and ozone aeration rate of 2mg/min and 30g Fe₂O₃(5)/SBA-15 materials. Thus, mesoporous catalytic materials such as Fe₂O₃/SBA-15 have an industrial application potential in advanced treatment of phenolic wastewater.