催化臭氧化水中硝基苯速率常数的影响因素

为考察催化臭氧化降解水中硝基苯的表观速率常数随剂量因素的演进,采用半连续流批次实验检测臭氧投量、硝基苯初始质量浓度和蜂窝陶瓷催化剂用量对单独臭氧氧化和臭氧/蜂窝陶瓷氧化工艺降解水中硝基苯的表观反应速率常数的影响规律.结果表明,在不同的臭氧投量(0.987~2.732 mg/L)、不同的硝基苯初始质量浓度(50~250μg/L)和不同的蜂窝陶瓷催化剂用量(1~5个)下,2种氧化工艺对硝基苯的降解均遵循假一级反应动力学模型,且2种工艺的表观反应速率常数都分别与臭氧投量、硝基苯初始质量浓度和蜂窝陶瓷催化剂的用量成正相关性.

Effect of applied quantitative factor on rate constant of catalytic ozonation for the decomposition of nitrobenzene in aqueous solution

In order to study the evolution of apparent rate constants with the applied quantitative factors,an experiment was conducted to investigate these influences on apparent rate constants in processes of ozonation alone and ceramic honeycomb-catalyzed ozonation for degradation of nitrobenzene in aqueous solution with a semi-continue batch reactor,such as the applied ozone dose,the initial concentration of nitrobenzene and the amount of catalyst.The results indicated that the two processes all followed the pseudo-first-order kinetic model at different applied ozone doses(0.987-2.732 mg/L),initial concentrations of nitrobenzene(50-250 μg/L) as well as amounts of catalyst(1-5 blocks),and the apparent rate constants of the two processes had positive relativity with the factors mentioned above.