CAS OpenIR  > 研究所(批量导入)
Activated carbon-enhanced ozonation of oxalate attributed to HO. oxidation in bulk solution and surface oxidation: Effects of the type and number of basic sites
Alternative TitleChem. Eng. J.
Xing, Linlin1,2,3; Xie, Yongbing1; Cao, Hongbin2; Minakata, Daisuke4; Zhang, Yi1,2; Crittenden, John C.5,6
2014-06-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume245Issue:1Pages:71-79
AbstractThe objective of this work is to study the influence of the type and number of basic sites of activated carbon (AC) on the AC-enhanced ozonation of oxalate. A commercial activated carbon (AC) was thermally treated with N-2, H-2, and NH3 at different temperatures. The results of chemical and textural characterization of the original and modified ACs show that the specific surface area and number of basic sites generally increased with increasing treatment temperature, whereas the acidic oxygen-containing groups decreased. Nitrogen-containing groups formed after NH3 treatment. The oxalate removal rate increased in ozonation systems with modified ACs compared with that of systems with the original AC. Oxalate degradation increased when ACs with higher numbers of basic sites and larger specific surface areas were used, except for the AC treated under NH3 at 900 degrees C. Oxalate removal was attributed to surface oxidation and HO. oxidation in bulk solution. The former process was dominant in the ozonation system with 0.2 g/L AC at pH 7. The experimental results indicate pyrrole groups may enhance ozone decomposition to generate HO. in bulk solution, while pyridine groups possibly decreased the surface oxidation of oxalate. Other basic sites, such as basal planes and basic oxygen-containing groups, enhanced oxalate removal through surface oxidation, and indirectly weakened HO. oxidation of oxalate in bulk solution. (C) 2014 Elsevier B.V. All rights reserved.; The objective of this work is to study the influence of the type and number of basic sites of activated carbon (AC) on the AC-enhanced ozonation of oxalate. A commercial activated carbon (AC) was thermally treated with N-2, H-2, and NH3 at different temperatures. The results of chemical and textural characterization of the original and modified ACs show that the specific surface area and number of basic sites generally increased with increasing treatment temperature, whereas the acidic oxygen-containing groups decreased. Nitrogen-containing groups formed after NH3 treatment. The oxalate removal rate increased in ozonation systems with modified ACs compared with that of systems with the original AC. Oxalate degradation increased when ACs with higher numbers of basic sites and larger specific surface areas were used, except for the AC treated under NH3 at 900 degrees C. Oxalate removal was attributed to surface oxidation and HO. oxidation in bulk solution. The former process was dominant in the ozonation system with 0.2 g/L AC at pH 7. The experimental results indicate pyrrole groups may enhance ozone decomposition to generate HO. in bulk solution, while pyridine groups possibly decreased the surface oxidation of oxalate. Other basic sites, such as basal planes and basic oxygen-containing groups, enhanced oxalate removal through surface oxidation, and indirectly weakened HO. oxidation of oxalate in bulk solution. (C) 2014 Elsevier B.V. All rights reserved.
KeywordActivated Carbon Oxalate Ozonation Basic Sites Surface Oxidation Hydroxyl Radical
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2014.01.104
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCATALYTIC OZONATION ; OZONE DECOMPOSITION ; AQUEOUS-SOLUTION ; OXALIC-ACID ; OH-RADICALS ; WATER ; CHEMISTRY ; ADSORPTION ; KINETICS ; FIBERS
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000335275200010
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10997
Collection研究所(批量导入)
Affiliation1.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Michigan Technol Univ, Dept Civil & Environm Engn, Houghton, MI 49931 USA
5.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
6.Georgia Inst Technol, Brook Byers Inst Sustainable Syst, Atlanta, GA 30332 USA
Recommended Citation
GB/T 7714
Xing, Linlin,Xie, Yongbing,Cao, Hongbin,et al. Activated carbon-enhanced ozonation of oxalate attributed to HO. oxidation in bulk solution and surface oxidation: Effects of the type and number of basic sites[J]. CHEMICAL ENGINEERING JOURNAL,2014,245(1):71-79.
APA Xing, Linlin,Xie, Yongbing,Cao, Hongbin,Minakata, Daisuke,Zhang, Yi,&Crittenden, John C..(2014).Activated carbon-enhanced ozonation of oxalate attributed to HO. oxidation in bulk solution and surface oxidation: Effects of the type and number of basic sites.CHEMICAL ENGINEERING JOURNAL,245(1),71-79.
MLA Xing, Linlin,et al."Activated carbon-enhanced ozonation of oxalate attributed to HO. oxidation in bulk solution and surface oxidation: Effects of the type and number of basic sites".CHEMICAL ENGINEERING JOURNAL 245.1(2014):71-79.
Files in This Item:
File Name/Size DocType Version Access License
Activated carbon-enh(1769KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xing, Linlin]'s Articles
[Xie, Yongbing]'s Articles
[Cao, Hongbin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xing, Linlin]'s Articles
[Xie, Yongbing]'s Articles
[Cao, Hongbin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xing, Linlin]'s Articles
[Xie, Yongbing]'s Articles
[Cao, Hongbin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.