Catalytic activity of Fe/SBA-15 for ozonation of dimethyl phthalate in aqueous solution

被引：132
作者：
Huang, Ruihuan [1 ]
Yan, Huihua [1 ]
Li, Laisheng [1 ]
Deng, Dayi [1 ]
Shu, Yuehong [1 ]
Zhang, Qiuyun [1 ]
机构：
[1] S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 106卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Fe/SBA-15; Catalytic ozonation; Dimethyl phthalate; ACTIVATED CARBON; OXALIC-ACID; SBA-15; MATERIALS; WATER-TREATMENT; DEGRADATION; OXIDATION; NITROBENZENE; OZONE; PHOTODEGRADATION; MECHANISM;
D O I：
10.1016/j.apcatb.2011.05.041
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The catalytic activity of iron-loaded SBA-15 (Fe/SBA-15) for ozonation of dimethyl phthalate (DMP) in aqueous solution was investigated. SBA-15 was synthesized by a hydrothermal method and Fe/SBA-15 was prepared by an incipient wetness impregnation method. The materials were characterized by a low and wide angle X-ray powder diffraction (XRD). N-2 adsorption-desorption, and atomic absorption spectrometer (AAS). Under the chosen conditions (50 mg h(-1) ozone dosage, 10 mg l(-1) DMP solution and 0.20 g l(-1) catalyst dosage), Fe/SBA-15/O-3 process obviously improved DMP and total organic carbon (TOC) removal efficiency due to the generation of hydroxyl radical (HCP), which was approved by tert-butanol (TBA). The mineralization of DMP followed an apparent first-order kinetics. The rate constant in Fe/SBA-15/O-3 was 0.0058 min(-1), 3.9 times higher than that of O-3 alone, 3.4 and 1.9 times higher than those of SBA-15/O-3 and Fe2O3/O-3 processes respectively. The iron content, reaction temperature and initial pH of DMP solution played important roles in Fe/SBA-15/O-3 process, while chloride ion exhibited the slight influence. The synergetic effect between O-3 and Fe/SBA-15 adsorption illustrates that Fe/SBA-15 is a promising catalyst for ozonation process. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：264 / 271
页数：8
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