Fe/MCM-41 as a promising heterogeneous catalyst for ozonation of p-chlorobenzoic acid in aqueous solution

• Published in: Chinese chemical letters Vol. 22; no. 6; pp. 683 - 686
• Main Authors: Huang, Rui Huan, Liu, Jie, Li, Lai Sheng, Zhang, Qiu Yun, Zeng, Li Xuan, Lu, Ping
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2011
• Subjects: Catalytic ozonation; CBA; Fe/MCM-41; MCM; p-Chlorobenzoic acid; TOC; TOC去除率; 总有机碳; 氯苯甲酸; 水溶液; 臭氧; 非均相催化剂; Fe/MCM-41; TOC; Catalytic ozonation; p-Chlorobenzoic acid
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2010.11.037

Mesoporous MCM-41 and Fe loaded MCM-41（Fe/MCM-41）,which were successfully prepared by a hydrothermal method and a dipping method respectively,were applied as heterogeneous catalysts for ozonation of p-chlorobenzoic acid（p-CBA） in aqueous solution.MCM-41 and Fe/MCM-41 were characterized by XRD,FT-IR and diffuse reflectance UV-vis（DR-UV-vis） techniques. The presence of either MCM-41 or Fe/MCM-41 improves p-CBA and total organic carbon（TOC） removal efficiency compared to ozonation alone.Under the experimental condition,TOC removal rate of Fe/MCM-41/O_3 process is over 63.5%at 60 min oxidation time,44.5%using MCM-41 as catalyst,only 37.7%with ozonation alone.The presence of tert-butanol（TBA） in the Fe/MCM-41/ O_3 process indicated that the oxidation mechanism of p-CBA occurs via OH in the liquid bulk.And Fe/MCM-41 is a promising catalyst.