摘要
异相芬顿(Fenton)催化氧化是一种有效的深度处理技术,通常能够处理难生物降解有机污染物并在温和的条件下实现反应,但非均相芬顿存在反应效率低下的缺点。主要通过增加反应的活性位点来加快反应速率,可以通过将催化剂的尺寸减小到纳米级、在比表面积高的载体上负载催化剂,引入金属到催化体系中等方式来对异相芬顿进行改性。在此基础上综述了非均相芬顿在载体型催化剂、磁性催化剂以及金属催化剂对有机物降解效率的影响。结果表明,改性的催化剂对印染废水的脱色率普遍达到90%以上,为后续的生物处理打下了基础。因此,研究具有催化活性和回收率高、重现性好的非均相芬顿催化剂是今后的发展方向。
Heterogeneous Fenton-catalyzed oxidation is a very effective method for the treatment of intractable biodegradable organic contaminants,which can be accomplished under mild conditions.However,heterogeneous Fenton has the disadvantage of low reaction efficiency.The reaction rate was raised mainly by increasing the active site of the reaction.Methods for enhancing the operational sites are to reduce the size of the catalyst for nanoscale and to load the catalyst onto a high specific surface area support.In addition,the introduction of metal into the catalytic system can also increase the reaction rate.The effects of heterogeneous Fenton on the degradation efficiency of organic compounds in supported catalysts,magnetic catalysts and metal catalysts were reviewed.The results showed that the decolorization rate of the modified catalysts was above 90%.Which laid the foundation for the subsequent biological treatment.Therefore,the study of high catalytic activity,easy recovery,excellent reproducibility of heterogeneous Fenton catalyst is the future direction of development.
出处
《应用化工》
CAS
CSCD
北大核心
2017年第8期1599-1602,1607,共5页
Applied Chemical Industry
基金
国家自然科学基金(5146401)
关键词
改性
异相芬顿
高级氧化技术
印染废水
催化剂
modified
heterogeneous Fenton
advanced oxidation technology
printing and dyeing wastewater
catalysts
