磁性介孔复合Fenton催化剂的制备及对染料废水降解行为和机理的研究

Dye wastewater is a major source of pollution in China. This project uses much concern mesoporous heterogeneous Fenton reaction to degrade dye wastewater. The technology's bottleneck in degradation of dye wastewater is high cost of catalyst, difficult recovery and easy dissolution of reactive component.Starting from improve the dye wastewater treatment efficiency, easy recycle, and decrease in the cost，magnetic mesoporous complex Fenton catalyst was synthesized. In the self-assembly process of mesoporous catalyst, the magnetic oxides, such as ( γ-Fe2O3), were embedded in porewall by regulation of reaction parameters to design the microstructure unit. Therefore, the loss of active components was effectively prevented. At the same time, catalyst's nanometer pore structure and high surface area can improve the adsorption and degradation properties of organic matter. Mesoporous composite itself possessing magnetic performance can be conveniently separated by outside magnetic field. When the magnetic mesoporous catalyst was used repeatedly, whether to maintain good performance of adsorption and degradation was further investigated. Study it's adsorption and degradation mechanism. And establish the adsorption model of magnetic mesoporous catalyst and explore dynamics equation of adsorption and degradation. High efficiency heterogeneous Fenton method in water treatment was laid on experimental and theoretical basis for the practical application of low consumption.

染料废水是我国一大行业污染源。本项目利用倍受关注的介孔非均相Fenton反应降解染料废水。该技术在染料废水降解应用中瓶颈是催化剂费用高、难回收以及活性组份易溶出。磁性介孔复合Fenton催化剂从提高染料废水的处理效果、易回收、降低费用出发，采用有机铁（FeCn-(NH3)+Br-）作为模板剂，在介孔催化剂自组装过程中,通过调控反应参数来设计微结构单元。使磁性氧化物（如γ-Fe2O3）包埋或镶嵌于介孔孔壁，有效防止活性组份的流失。利用介孔的纳米效应和高比表面积提高对有机物的吸附和降解性能；利用介孔复合物本身具有的磁性，通过外界磁场可以方便的分离。进一步考察磁性介孔复合催化剂多次重复利用其降解效果维持良好的可行性。研究其吸附-降解机理，并建立磁性介孔复合催化剂的吸附模型，探究其吸附-降解的动力学并拟合动力学方程。为非均相Fenton法在水处理方面高效-低耗的实际应用奠定实验和理论基础。

染料废水是我国一大行业污染源，本项目利用倍受关注的介孔结构的非均相类Fenton反应降解染料废水。该技术在染料废水降解应用中的瓶颈是催化剂费用高、难回收以及活性组份易溶出。磁性介孔结构类Fenton催化剂从提高染料废水的处理效果、易回收、降解费用出发，采用有机长链（P123或F127）作为模板剂，在介孔结构催化剂自组装过程中，通过调控反应参数来设计微结构单元。使磁性氧化物（如γ-Fe2O3)包埋或镶嵌于介孔孔壁，有效防止活性组份的流失。利用介孔的纳米效应和高比表面积提高对有机物的吸附和降解性能；利用介孔复合材料本身具有磁性，通过外界磁场或者离心分离可以方便的分离。进一步考察磁性介孔复合催化剂多次重复利用其降解效果维持良好的可行性。研究其吸附-降解机理，并建立磁性介孔结构复合催化剂的吸附模型，探究其吸附-降解的动力学并拟合动力学方程。为类Fenton法水处理方面高效-低耗的实际应用奠定实验和理论基础。