Preparation of SnOx-MnOx@Al2O3 for Catalytic Ozonation of Phenol in Hypersaline Wastewater

IF 2.1 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Han Guo, Xuankun Li, Guanghui Li, Yang Liu, P. Rao
{"title":"Preparation of SnOx-MnOx@Al2O3 for Catalytic Ozonation of Phenol in Hypersaline Wastewater","authors":"Han Guo, Xuankun Li, Guanghui Li, Yang Liu, P. Rao","doi":"10.1080/01919512.2022.2084031","DOIUrl":null,"url":null,"abstract":"ABSTRACT The catalytic ozonation process (COP) is an effective and advanced oxidation technology for the treatment of organic wastewater. However, high salinity has a negative impact on catalytic ozonation performance. In this work, tin oxide (SnOx) and manganese oxide (MnOx) doped γ-Al2O3 catalysts (SnOx-MnOx@Al2O3) were prepared by the incipient wetness impregnation method and characterized by SEM, XRD, BET, XRT, XPS and FT-IR techniques. The SnOx-MnOx@Al2O3 catalyst was applied to the catalytic ozonation of phenol in hypersaline wastewater, and the catalytic performance was evaluated by COD removal efficiency. When the mass ratio of MnOx to SnOx was 1:3, the pH was 7, the catalyst dosage was 40 g/L, the ozone dosage was 6 mg/(L·min), the NaCl concentration was 15 g/L and the COD removal efficiency of hypersaline phenol wastewater reached 93.8% after 240 min of catalytic ozonation treatment. Compared with the single ozonation process (SOP), the introduction of SnOx-MnOx@Al2O3 catalyst improved the COD removal efficiency by 32.3%. Cl− may quench surface •OH species and ozone to form Cl• and Cl2•− with low activity and high selectivity, resulting in the reduction of catalytic ozonation efficiency. The catalytic activity of the SnOx-MnOx@Al2O3 catalyst remained high after eight cycles. In conclusion, the SnOx-MnOx@Al2O3 catalytic ozonation system exhibits efficient and stable mineralization performance and is a promising strategy for the treatment of hypersaline organic wastewater.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ozone: Science & Engineering","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1080/01919512.2022.2084031","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 3

Abstract

ABSTRACT The catalytic ozonation process (COP) is an effective and advanced oxidation technology for the treatment of organic wastewater. However, high salinity has a negative impact on catalytic ozonation performance. In this work, tin oxide (SnOx) and manganese oxide (MnOx) doped γ-Al2O3 catalysts (SnOx-MnOx@Al2O3) were prepared by the incipient wetness impregnation method and characterized by SEM, XRD, BET, XRT, XPS and FT-IR techniques. The SnOx-MnOx@Al2O3 catalyst was applied to the catalytic ozonation of phenol in hypersaline wastewater, and the catalytic performance was evaluated by COD removal efficiency. When the mass ratio of MnOx to SnOx was 1:3, the pH was 7, the catalyst dosage was 40 g/L, the ozone dosage was 6 mg/(L·min), the NaCl concentration was 15 g/L and the COD removal efficiency of hypersaline phenol wastewater reached 93.8% after 240 min of catalytic ozonation treatment. Compared with the single ozonation process (SOP), the introduction of SnOx-MnOx@Al2O3 catalyst improved the COD removal efficiency by 32.3%. Cl− may quench surface •OH species and ozone to form Cl• and Cl2•− with low activity and high selectivity, resulting in the reduction of catalytic ozonation efficiency. The catalytic activity of the SnOx-MnOx@Al2O3 catalyst remained high after eight cycles. In conclusion, the SnOx-MnOx@Al2O3 catalytic ozonation system exhibits efficient and stable mineralization performance and is a promising strategy for the treatment of hypersaline organic wastewater.
高盐废水中苯酚催化臭氧氧化SnOx-MnOx@Al2O3的制备
催化臭氧氧化法(COP)是一种高效、先进的处理有机废水的氧化技术。然而,高盐度对催化臭氧化性能有负面影响。本文采用初湿浸渍法制备了氧化锡(SnOx)和氧化锰(MnOx)掺杂的γ-Al2O3催化剂(SnOx-MnOx@Al2O3),并采用SEM、XRD、BET、XRT、XPS和FT-IR技术对其进行了表征。将SnOx-MnOx@Al2O3催化剂应用于高盐废水中苯酚的催化臭氧化处理,并通过COD去除率评价其催化性能。当MnOx与SnOx的质量比为1:3、pH = 7、催化剂用量为40 g/L、臭氧用量为6 mg/(L·min)、NaCl浓度为15 g/L时,经过240 min的催化臭氧化处理,高盐苯酚废水的COD去除率达到93.8%。与单次臭氧氧化(SOP)工艺相比,SnOx-MnOx@Al2O3催化剂的引入使COD去除率提高了32.3%。Cl -可能猝灭表面•OH和臭氧,形成低活性、高选择性的Cl•和Cl2•−,导致催化臭氧化效率降低。SnOx-MnOx@Al2O3催化剂经过8个循环后仍保持较高的催化活性。综上所述,SnOx-MnOx@Al2O3催化臭氧化系统具有高效稳定的矿化性能,是处理高盐有机废水的一种有前景的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Ozone: Science & Engineering
Ozone: Science & Engineering 环境科学-工程:环境
CiteScore
5.90
自引率
11.10%
发文量
40
审稿时长
2 months
期刊介绍: The only journal in the world that focuses on the technologies of ozone and related oxidation technologies, Ozone: Science and Engineering brings you quality original research, review papers, research notes, and case histories in each issue. Get the most up-to date results of basic, applied, and engineered research including: -Ozone generation and contacting- Treatment of drinking water- Analysis of ozone in gases and liquids- Treatment of wastewater and hazardous waste- Advanced oxidation processes- Treatment of emerging contaminants- Agri-Food applications- Process control of ozone systems- New applications for ozone (e.g. laundry applications, semiconductor applications)- Chemical synthesis. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信