摘要
本文以硝基苯为目标反应物 ,对臭氧 /分子筛氧化和臭氧氧化去除水中微量有机污染物的效果进行了比较。发现与单独的臭氧氧化相比 ,臭氧 /分子筛氧化工艺可以提高水中硝基苯的降解效果。在本次实验条件下 ,单独臭氧氧化和臭氧 /分子筛氧化对硝基苯的去除率都随着温度的升高而增加 ,随着pH值的升高越来越大 ;此外还考察了分子筛对硝基苯去除率的影响 ,初步分析了分子筛在臭氧氧化过程中的作用。
Comparative experiments of ozonation alone and molecular sieve-catalyzed ozonation processes were conducted with nitrobenzene as the model organic pollutant. It was found that molecular sieve/O 3 could greatly increase the removal efficiency of nitrobenzene compared with that achieved by ozonation alone. Under the conditions of this experiment, the degradation rate of ozonation alone and molecular sieve-catalyzed ozonation processes are increasing with the amount of catalyst, temperature and value of pH increased in the solution. The experimental results indicate that both in ozonation and molecular sieve-catalyzed ozonation processes nitrobenzene was primarily oxidized by OH·free radical in aqueous solution. We also investigated the effects of catalyst, analyzed the action of catalyst in the process of ozonation.
出处
《化学工程师》
CAS
2004年第11期22-25,共4页
Chemical Engineer
