γ-Fe-Ti-Al2O3催化臭氧氧化水中布洛芬并阻断溴酸盐生成研究  

Catalytic ozonation of ibuprofen in water and ketardation of bromate formation by γ-Fe-Ti-Al_2O_3

作　　者：邴吉帅 陈丽[1] 张彭义[2] BING Jishuai;CHEN Li;ZHANG Pengyi(Marine Resources Development Institute of Jiangsu, Huaihai Institute of Technology, Lianyungang, 222002, China;School of Environment, Tsinghua University, Beijing, 100084, China)

机构地区：[1]江苏省海洋资源开发研究院,淮海工学院,连云港222002 [2]清华大学环境学院,北京100084

出　　处：《环境化学》2018年第12期2694-2700,共7页Environmental Chemistry

基　　金：江苏省环保科研项目(2012010);江苏省科技计划项目(BE2013662)资助.

摘　　要：以葡萄糖为模版,采用蒸发诱导自组装法合成了铁、钛掺杂γ-Al_2O_3(γ-Fe-Ti-Al_2O_3)介孔催化剂,并将其用于臭氧氧化含Br^-水中布洛芬. X射线衍射(XRD)、氮气吸附-脱附(BET)、X射线光电子能谱(XPS)表征结果表明,铁、钛成功掺杂进入γ-Al_2O_3骨架,分布均匀,保持了γ-Al_2O_3有序的介孔结构,具有较大的比表面积,钛的价态为Ti^(4+)和Ti^(3+)共存,铁的价态是Fe^(3+).铁、钛的掺杂显著提高γ-Al_2O_3催化臭氧氧化含Br^-水中布洛芬的活性,且有效阻断了溴酸盐的生成,反应60 min后,TOC去除率由γ-Al_2O_3的54%提高到86%,而单独臭氧氧化仅为13%.电子自旋共振和催化剂表面Fe^(2+)离子捕获实验表明,羟基和超氧自由基是反应活性氧物种,有利于有机物的矿化;有机物能够强化γ-Fe-Ti-Al_2O_3催化剂中的Fe^(3+)还原为Fe^(2+),从而有利于溴酸盐的阻断还原.Using glucose as a template, iron-, and titanium-doped γ-Al2O3 (γ-Fe-Ti-Al2O3) mesoporous catalysts were synthesized by evaporation-induced self-assembly method and applied to ozonation of ibuprofen in Br- containing water. X ray diffraction (XRD), nitrogen adsorption desorption (BET), X ray photoelectron spectroscopy (XPS) characterization results showed that iron and titanium were successfully doped into the skeleton of γ-Al2O3, with uniform distribution. And the ordered mesoporous structure of γ-Al2O3 was maintained, with large specific surface area. The valence of titanium coexists with Ti4+ and Ti3+, and the valence of iron was Fe^3+.The addition of iron and titanium significantly enhanced the removal rate of ibuprofen by ozonation in Br^- containing water, and effectively blocked the formation of bromate. After 60 min reaction, the removal rate of TOC was increased from 54% of γ-Al2O3/O3 to 86% with γ-Fe-Ti-Al2O3/O3, while the ozonation alone was only 13%. Electron spin resonance and Fe^2+ ion capture experiments on the surface of the catalyst showed that hydroxyl and superoxide radicals were the reactive oxygen species, which were beneficial to the mineralization of organic matter. The addition of organic compounds enhanced the reduction of Fe^3+ to Fe^2+ in the catalytic ozonation of γ-Fe-Ti-Al2O3, which is beneficial to the retardation of bromate generation.

关 键 词：γ-Fe-Ti-Al2O3 催化臭氧氧化 布洛芬 溴酸盐 

分 类 号：X703[环境科学与工程—环境工程]