【作者】 赵雷； 孙志忠； 马军；

【Author】 ZHAO Lei SUN Zhi-zhong MA Jun (1.School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China;2.School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China)

【机构】 哈尔滨工业大学市政环境工程学院； 黑龙江大学化学化工与材料学院；

【摘要】 以二苯甲酮为目标反应物,采用传统的气液接触式反应器对堇青石催化臭氧化和单独臭氧氧化工艺去除饮用水中有机污染物的效果进行比较。发现与单独臭氧氧化相比,堇青石催化臭氧化工艺可以明显提高水中二苯甲酮的降解效果。在本实验条件下,单独臭氧氧化和堇青石催化臭氧化工艺对二苯甲酮的降解效率都随着溶液初始 pH 值的升高而逐渐增加。考察了催化剂投量、叔丁醇、水体温度和臭氧投加工艺等因素对二苯甲酮降解效果的影响,结果表明单独臭氧氧化和堇青石催化臭氧化工艺对二苯甲酮的降解主要源自于水溶液中羟基自由基（HO^*） 的氧化作用。实验以 XRD、FT-IR、pH_zpc和表面羟基含量的测试结果为基础,从臭氧与非均相表面的作用方式上推测了堇青石催化臭氧化降解水中二苯甲酮过程中 HO^*的引发历程。对堇青石催化剂的使用寿命进行了初步的研究。更多还原

【Abstract】 Comparative experiments of ozonation alone and cordierite catalytic ozonation processes for the organic degradation efficiency in drinking water were conducted with benzophenone as the model organic pollutant in a conventional gas bubble-contacting reactor.It is found that cordierite catalyst can increase the degradation efficiency of benzophenone compared with that achieved by ozonation alone.Under the conditions of this experiment,the degradation efficiency of ozonation alone and cordierite catalytic ozonation processes are increasing with the initial pH increasing in the solution.The effects of the catalyst amount,tert-butanol,temperature and the different process of ozone addition on the degradation of benzophenone were also investigated.The results indicate that in the both processes,benzophenone is primarily oxidized by hydroxyl radicals （HO^*） in aqueous solution.Based on the results ofXRD,FT-IR,pH_zpc and surface hydroxyl groups density,possible mechanism of HO^* initiation was discussed from the aspect of interaction of ozone and heterogeneous surface in the process of cordierite catalytic ozonation for the decomposition of benzophenone in aqueous solution.Primary studies were conducted to determine the lifetime of the cordierite catalyst.更多还原