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

• Published in: Water science and technology 2018-08, Vol.78 (2), p.339-346
• Main Authors: Xu, Xuelu, Zhao, Jiao, Jiang, Yunfei, Tang, Xiaojia, Zhou, Zihao, Zhu, Yimin
• Format: Article
• Language: English
• Subjects: Activated carbon; Aluminum oxide; Aniline; Aqueous solutions; Atomic emission spectroscopy; Catalysis; Catalysts; Chemicals; Composite materials; Emission analysis; Inductively coupled plasma; Load distribution (forces); Manganese; Metal oxides; Methods; Ozonation; Ozone; Ozonization; Phenols; Photocatalysis; Removal; Sensors; Solid phases; Stress concentration; Transitional aluminas; Wastewater; Wastewater treatment
• ISSN: 0273-1223; 1996-9732
• DOI: 10.2166/wst.2018.301

In this study, Mn-Ce-Ox/γ-Al2O3 supported catalysts were adopted to promote the removal efficiency of aniline in simulated wastewater with ozone. Mn-Ce-Ox/γ-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-Ox active sites and an abundant porous structure from the γ-Al2O3 support. The catalytic ozonation results showed that with Mn3-Ce1-Ox/γ-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-Ox 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.