有机酸根对铁氧化物催化UV-Fenton降解染料的性能影响及其机理研究
发布时间：2019-02-19 12:17
【摘要】：多相光助-芬顿技术作为高级氧化技术的一种,具有非常大的应用潜力。铁氧化物是多相芬顿催化剂开发常用的活性组分,通过研究不同晶型铁氧化物之间的催化性能可以为开发新型、高效的多相催化剂提供理论依据,将有助于多相芬顿技术的发展。本文选取了五种不同晶型的铁氧化物作为多相芬顿体系的催化剂,比较研究了它们在芬顿和紫外光助-芬顿体系中催化降解橙Ⅱ的性能。结果表明:紫外光的加入能够极大地提高各体系的降解效率;在紫外光照射下,以磁铁矿和磁赤铁矿组成的混晶的催化性能和稳定性能最佳,五种铁氧化物的催化性能大小为:混晶磁铁矿针铁矿≈磁赤铁矿赤铁矿;在反应过程中五种铁氧化物都伴随有一定量的铁离子溶出,但只有混晶溶出的铁离子能够在反应结束后吸附回来。而后在反应体系中加入一定量的有机酸根,重点研究了不同的有机酸根对体系中橙Ⅱ降解的影响。研究发现,不同的有机酸根对多相光助-芬顿体系降解橙Ⅱ的影响不同,丙二酸钠和草酸钠会促进橙Ⅱ的降解,EDTA、柠檬酸三钠和乙酸钠则会抑制橙Ⅱ的降解,其中草酸钠能够极大地促进体系降解橙Ⅱ的效率,它的最佳添加浓度为0.5mmol/L。通过进一步的研究发现,草酸根对体系降解效率的促进主要是通过促进铁离子的溶出来实现的。
[Abstract]:As a kind of advanced oxidation technology, multiphase photo-assisted Fenton technology has great application potential. Iron oxide is a common active component in the development of multiphase Fenton catalyst. The study on the catalytic performance of different crystalline iron oxides can provide theoretical basis for the development of new and efficient multiphase catalysts. It will be helpful to the development of multiphase Fenton technology. In this paper, five kinds of iron oxides with different crystalline forms were selected as catalysts for multiphase Fenton system, and their catalytic degradation properties of orange 鈪，
本文编号：2426493
[Abstract]:As a kind of advanced oxidation technology, multiphase photo-assisted Fenton technology has great application potential. Iron oxide is a common active component in the development of multiphase Fenton catalyst. The study on the catalytic performance of different crystalline iron oxides can provide theoretical basis for the development of new and efficient multiphase catalysts. It will be helpful to the development of multiphase Fenton technology. In this paper, five kinds of iron oxides with different crystalline forms were selected as catalysts for multiphase Fenton system, and their catalytic degradation properties of orange 鈪，
本文编号：2426493
本文链接：https://www.wllwen.com/kejilunwen/huaxue/2426493.html
教材专著
