TiO_2/AC催化臭氧氧化处理水中的苯酚  

Removal of Phenol in Water by Ozonation with Catalysis of TiO_2-mounted Activated Carbon

作　　者：吴桂萍[1] 安文浩[2] 陆晓华[1] 丁八镇 

机构地区：[1]华中科技大学环境科学研究所 [2]韩国全北国立大学校

出　　处：《环境科学与技术》2007年第2期23-25,共3页Environmental Science & Technology

基　　金：中南民族大学引进人才科研启动基金(yzz05019)

摘　　要：研究了单独臭氧氧化及以活性炭(AC)和负载二氧化钛的活性碳(TiO2/AC)为催化剂催化臭氧氧化处理水中苯酚的效果。考察了AC、TiO2/AC对苯酚的吸附特性及三种方法对苯酚的转化率及矿化率效果及其臭氧利用效率,并对氧化过程进行了动力学分析。实验结果表明:AC、TiO2/AC对苯酚的吸附均较好地符合Freundlich方程;催化臭氧氧化转化苯酚的效果高于单独臭氧氧化;TiO2/AC作催化剂有利于苯酚的最终矿化,同时提高了臭氧的利用效率;3种氧化反应均较好的符合二级动力学方程,TiO2/AC催化臭氧氧化苯酚的二级动力学常数为0.0001L/(mg.min),高于单独臭氧氧化0.00004L/(mg.min)和AC催化臭氧氧化0.00006L/(mg.min)。The effectiveness of ozonation and catalytic ozonation with activated carbon (AC) and TiO2-mounted activated carbon (TiO2/AC) as catalyst on removal of phenol was investigated. Adsorption of phenol by AC and TiO2/AC, removal and mineralization efficiency of phenol and utilization efficiency of ozone were studied in the experiment. Kinetics analysis was also done. Results indicated that the isothermal data of adsorption phenol on AC and TiO2/AC followed the Freundlich model well. The presence of catalyst improved the removal and mineralization efficiency of phenol. TiO2/AC was active in degradation phenol into CO2 and H2O and enhanced utilization efficiency of ozone. The degrading COD reactions followed the pseudo second-order kinetics model well and the constants of ozonation, AC catalytic ozonation and TiO2/AC catalytic ozonation were 0.00004L/mg·min, 0.00006 L/mg·min and 0.0001 L/mg·min respectively.

关 键 词：催化臭氧氧化 吸附 TIO2 活性炭 苯酚 

分 类 号：X131[环境科学与工程—环境科学]