活性炭负载铈催化臭氧氧化去除水中邻苯二甲酸二甲酯的研究

CATALYTIC OZONATION OF DIMETHYL PHTHALATE OVER CERIUM/ACTIVATED CARBON CATALYST

摘要: 用浸渍法在活性炭上负载铈制备催化剂（Ce/AC），并用XRD和SEM对其进行了表征．考察了Ce负载量、催化剂投加量对Ce/AC催化臭氧氧化降解邻苯二甲酸二甲酯（DMP）的影响．结果表明，Ce/AC催化臭氧氧化降解DMP的优化参数是催化剂投加量1.5 g/L，Ce的负载量0.2 %．在优化条件下，Ce/AC加入有利于催化臭氧氧化DMP过程中TOC的去除．质量浓度30 mg/L（pH=5.0）DMP反应60 min后的TOC去除率由以AC为催化剂的48 %提高到68 %，而单独臭氧氧化过程中TOC去除率仅有22 %．

Abstract: Cerium-doped activated carbon catalyst (Ce/AC) was prepared using dipping method to degrade dimethyl phthalate in water. Activated carbon (AC) and Ce/AC were characterized by XRD and SEM. The effects of cerium content and catalyst dosage on catalytic ozonation of DMP were investigated. The results showed that the catalytic activity reached optimal when 0.2 % cerium was doped onto AC support and the optimal dosages of Ce/AC catalyst was 1.5 g/L. Compared with the native activated carbon, Ce/AC could notably enhance the catalytic ozonation of DMP. The TOC removal rate using Ce/AC catalyst at 60 min could reach 68 %, while 48 % using AC catalyst and only 22 % using ozone alone.