Cerium incorporated MCM-48 (Ce-MCM-48) as a catalyst to inhibit bromate formation during ozonation of bromide-containing water: Efficacy and mechanism
文献类型：期刊论文
| 作者 | Li, Weiwei; Lu, Xiaowei; Xu, Ke; Qu, Jiuhui; Qiang, Zhimin |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2015-12-01 |
| 卷号 | 86期号:0页码:2-8 |
| 关键词 | Bromate formation Catalytic ozonation Cerium incorporated MCM-48 Inhibition Water treatment |
| 英文摘要 | The composite mesoporous sieve Ce-MCM-48 (cerium incorporated MCM-48) with different Si/Ce molar ratios were synthesized hydrothermally and characterized with X-ray diffraction, X-ray photoelectron spectroscopy, BET surface area, and pH(pzc). Results indicate that Ce-MCM-48, especially with a Si/Ce molar ratio of 66 (i.e., Ce-66-MCM-48), could significantly inhibit bromate (BrO3-) formation during ozonation of Br- -containing water, achieving 91% of inhibition efficiency at pH 7.6 and 25 degrees C. An acidic or alkaline pH decreased the inhibition efficiency of Ce-66-MCM-48 to some extent, but reaction temperature ranging from 15 to 30 degrees C had no significant impact By comparing the bromine mass balance, aqueous O-3 decomposition, and newly formed H2O2 between O-3 and O-3/Ce-66-MCM-48 processes, the inhibition mechanism was proposed: Ce-66-MCM-48 promoted aqueous O-3 decomposition to generate hydroxyl radicals (center dot OH) that could merge into H2O2, so the oxidative transformation of Br- and HOBr/OBr- by O-3 and center dot OH was primarily suppressed. The catalytic ability of Ce-66-MCM-48 was continuously regenerated through the circulating reactions between Ce(III) and Ce(IV) occurring on the catalyst surface. Besides its inhibition on BrO3- formation, Ce-66-MCM-48 could also enhance the degradation of refractory organic micropollutants. Because of these distinct merits, Ce-66-MCM-48 has potential applications to water treatment by ozone. (c) 2015 Elsevier Ltd. All rights reserved. |
| 研究领域[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| WOS记录号 | WOS:000366618300002 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32733]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Weiwei,Lu, Xiaowei,Xu, Ke,et al. Cerium incorporated MCM-48 (Ce-MCM-48) as a catalyst to inhibit bromate formation during ozonation of bromide-containing water: Efficacy and mechanism[J]. WATER RESEARCH,2015,86(0):2-8. |
| APA | Li, Weiwei,Lu, Xiaowei,Xu, Ke,Qu, Jiuhui,&Qiang, Zhimin.(2015).Cerium incorporated MCM-48 (Ce-MCM-48) as a catalyst to inhibit bromate formation during ozonation of bromide-containing water: Efficacy and mechanism.WATER RESEARCH,86(0),2-8. |
| MLA | Li, Weiwei,et al."Cerium incorporated MCM-48 (Ce-MCM-48) as a catalyst to inhibit bromate formation during ozonation of bromide-containing water: Efficacy and mechanism".WATER RESEARCH 86.0(2015):2-8. |
入库方式： OAI收割
来源：生态环境研究中心
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