摘要
根据小型试验结果,分析了复配催化剂催化臭氧化富里酸的反应机理。研究结果表明,催化臭氧化的过程包括直接氧化和间接氧化两种作用,其中自由基链反应是主要作用。除氧化作用外,活性炭和铁屑表面能吸附臭氧和有机污染物,强化相互之间的氧化作用,并促进羟基自由基(.OH)的产生;另外,铁炭颗粒微界面形成众多的微原电池,在臭氧氧化作用和TiO2的诱导作用下,能够生成更多的原子氧和羟基自由基,可以进一步提高了氧化效率。富里酸的催化臭氧化降解过程符合拟一级反应动力学,并经过对比发现可见腐殖质的降解速率高于UV腐殖质的降解速率。
According to small-scale experiment,the reaction mechanism of ozone complex catalyst oxidation of fulvic acid was analyzed.The results showed that catalytic ozonation includes direct oxidation and indirect oxidation,and free radical chain reaction is the main role.In addition to oxidation,the activated carbon and iron surface can absorb ozone and organic pollutants,strengthen the mutual oxidation and to promote hydroxyl radical(·OH) generation.Futhermore,many micro-micro-interface of the original battery forms on the surface of iron and carbon particles in the ozone oxidation and the induction of TiO2.It is able to produce more atomic oxygen and hydroxyl radicals which can further improve the oxidation efficiency.Catalytic ozonation process of fulvic acid in line with the proposed kinetics,and after comparison shows that the degradation rate of visible humus higher than the degradation rate of UV humus.
出处
《给水排水》
CSCD
北大核心
2010年第S2期32-36,共5页
Water & Wastewater Engineering
关键词
催化臭氧化
富里酸
复配催化剂
Catalytic ozonation
Fulvic acid
Complex catalyst
