1.Coal Chemistry Research Institute，China Coal Research Institute，Beijing ，China；2.School of Civil and Environmental Engineering，Harbin Institute of Technology(Shenzhen), Shenzhen ，China；3.PXMK Environmental Science and Technology Co., Ltd.,Pingxiang , China；4.Datang (Beijing) Water Engineering Technology Co.,Ltd., Beijing China

为分析非均相催化臭氧处理煤化工高含盐废水的处理效果和影响因素,采用氧化铝粉末为原料制备了MgO-Al2O3催化剂,通过扫描电镜和比表面积仪对其微观形貌及比表面积进行表征,以废水COD为考察指标,研究了臭氧单独氧化和以MgO-Al2O3为催化剂催化臭氧氧化对COD的去除效果,并探讨了催化剂和臭氧的投加量对催化臭氧氧化的影响。结果表明,MgO-Al2O3催化剂表面不平整,含有金属氧化物MgO,比表面积较大,为153.5 m2/g。臭氧单独氧化和催化臭氧氧化对COD的去除率分别达到45%和61%,后者对COD的去除效果更好。催化剂和臭氧的投加量均会影响催化臭氧氧化的处理效果,适当增大二者的投加量,可提高COD去除效果,但过量后,去除效果并不会显著提高,试验中催化剂和臭氧的最佳投加量分别为300 g/L和260 mg/（L·h）。

In order to ascertain the treatment effect and influencing factors of heterogeneous catalytic ozonation process for treatment of high-salt wastewater from coal chemical industry,MgO-Al2O3 catalyst was prepared by using alumina powder as raw material,and characterized by scanning electron microscopy and specific surface area instrument.COD removal rate was used as an indicator to study the effect of ozone oxidation alone and MgO-Al2O3 as catalyst for the oxidation of COD,and the effects of catalyst and ozone dosages for catalytic ozonation were discussed.The results show that the surface of MgO-Al2O3 catalyst is not flat,contains metal oxide MgO,and has a large specific surface area,reaching 153.5 m2/g.The COD removals by ozone oxidation and catalytic ozonation reach 45% and 61%,respectively,and the latter has a better COD removal effect.The dosages of catalyst and ozone all affect the treatment effect of catalytic ozonation,increasing the dosages of them can increase the COD removal effect.However,after the excess,the removal effect will not be significantly improved.The optimum dosages of catalyst and ozone in the experiment are 300 g/L and 260 mg/(L·h),respectively.

国家重点研发计划资助项目(2017YFB0602304)；深圳市科技计划资助项目(JCYJ20150529114024234)；