Promotion of catalytic ozonation of aniline with Mn-Ce-Ox/γ-Al2O3

被引:10
|
作者
Xu, Xuelu [1 ]
Zhao, Jiao [1 ]
Jiang, Yunfei [1 ]
Tang, Xiaojia [1 ]
Zhou, Zihao [1 ]
Zhu, Yimin [1 ]
机构
[1] Dalian Maritime Univ, Inst Environm Remediat, Dalian 116026, Peoples R China
关键词
aniline; catalyst; heterogeneous; manganese cerium oxides; ozonation; AQUEOUS-SOLUTION; PHOTOCATALYTIC OZONATION; OZONE DECOMPOSITION; ACID; DEGRADATION; WATER; CERIUM; NITROBENZENE; COMPOSITE; MECHANISMS;
D O I
10.2166/wst.2018.301
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, Mn-Ce-O-x/gamma-Al2O3 supported catalysts were adopted to promote the removal efficiency of aniline in simulated wastewater with ozone. Mn-Ce-O-x/gamma-Al2O3 catalysts were prepared by the impregnation-calcination method. Its phase structure, specific surface area, loading amount and distribution of active units were analyzed by XRD, BET, ICP-AES and TEM/SEM respectively. The characterization results demonstrated that the catalysts had a good dispersion of Mn-Ce-O-x active sites and an abundant porous structure from the gamma-Al2O3 support. The catalytic ozonation results showed that with Mn-3-Ce-1-O-x/gamma-Al2O3(1.0), the aniline removal efficiency was highly improved, 15.0% higher than that of ozonation without a catalyst. Furthermore, from the variation in loading amounts of Mn and Ce, it can be seen that the molar ratio of Mn and Ce within the Mn-Ce-O-x plays a key role in accelerating the ozonation of aniline in simulated wastewater with ozone, while Mn:Ce = 1.9:1 showed the best performance. More importantly, the catalysts showed high recycling performance and could be reused at least 12 times without obvious loss of activity.
引用
收藏
页码:339 / 346
页数:8
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