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Activated carbon enhanced ozonation of oxalate attributed to HO center dot oxidation in bulk solution and surface oxidation: Effect of activated carbon dosage and pH
Alternative TitleJ. Environ. Sci.
Xing, Linlin1,2,3,4; Xie, Yongbing1,2,3; Minakata, Daisuke5; Cao, Hongbin1,2,3; Xiao, Jiadong1,2,3,4; Zhang, Yi1,2,3; Crittenden, John C.6
2014-10-01
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
ISSN1001-0742
Volume26Issue:10Pages:2095-2105
AbstractOzonation of oxalate in aqueous phase was performed with a commercial activated carbon (AC) in this work. The effect of AC dosage and solution pH on the contribution of hydroxyl radicals (HO center dot) in bulk solution and oxidation on the AC surface to the removal of oxalate was studied. We found that the removal of oxalate was reduced by tert-butyl alcohol (tBA) with low dosages of AC, while it was hardly affected by tBA when the AC dosage was greater than 0.3 g/L. tBA also inhibited ozone decomposition when the AC dosage was no more than 0.05 g/L, but it did not work when the AC dosage was no less than 0.1 g/L. These observations indicate that HO center dot in bulk solution and oxidation on the AC surface both contribute to the removal of oxalate. HO center dot oxidation in bulk solution is significant when the dosage of AC is low, whereas surface oxidation is dominant when the dosage of AC is high. The oxalate removal decreased with increasing pH of the solution with an AC dosage of 0.5 g/L. The degradation of oxalate occurs mainly through surface oxidation in acid and neutral solution, but through HO center dot oxidation in basic bulk solution. A mechanism involving both HO center dot oxidation in bulk solution and surface oxidation was proposed for AC enhanced ozonation of oxalate. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.; Ozonation of oxalate in aqueous phase was performed with a commercial activated carbon (AC) in this work. The effect of AC dosage and solution pH on the contribution of hydroxyl radicals (HO center dot) in bulk solution and oxidation on the AC surface to the removal of oxalate was studied. We found that the removal of oxalate was reduced by tert-butyl alcohol (tBA) with low dosages of AC, while it was hardly affected by tBA when the AC dosage was greater than 0.3 g/L. tBA also inhibited ozone decomposition when the AC dosage was no more than 0.05 g/L, but it did not work when the AC dosage was no less than 0.1 g/L. These observations indicate that HO center dot in bulk solution and oxidation on the AC surface both contribute to the removal of oxalate. HO center dot oxidation in bulk solution is significant when the dosage of AC is low, whereas surface oxidation is dominant when the dosage of AC is high. The oxalate removal decreased with increasing pH of the solution with an AC dosage of 0.5 g/L. The degradation of oxalate occurs mainly through surface oxidation in acid and neutral solution, but through HO center dot oxidation in basic bulk solution. A mechanism involving both HO center dot oxidation in bulk solution and surface oxidation was proposed for AC enhanced ozonation of oxalate. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
KeywordActivated Carbon Oxalate Ozonation Hydroxyl Radicals Surface Oxidation Catalytic Ozonation
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jes.2014.08.009
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCATALYTIC OZONATION ; AQUEOUS-PHASE ; OXALIC-ACID ; OZONE DECOMPOSITION ; HYDROGEN-PEROXIDE ; WATER-TREATMENT ; RATE CONSTANTS ; OH-RADICALS ; DEGRADATION ; KINETICS
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000343780700017
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11691
Collection研究所(批量导入)
Affiliation1.Natl Engn Lab Hydrometal 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.Beijing Engn Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Michigan Technol Univ, Dept Civil & Environm Engn, Houghton, MI 49931 USA
6.Georgia Inst Technol, Brook Byers Inst Sustainable Syst, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
Recommended Citation
GB/T 7714
Xing, Linlin,Xie, Yongbing,Minakata, Daisuke,et al. Activated carbon enhanced ozonation of oxalate attributed to HO center dot oxidation in bulk solution and surface oxidation: Effect of activated carbon dosage and pH[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2014,26(10):2095-2105.
APA Xing, Linlin.,Xie, Yongbing.,Minakata, Daisuke.,Cao, Hongbin.,Xiao, Jiadong.,...&Crittenden, John C..(2014).Activated carbon enhanced ozonation of oxalate attributed to HO center dot oxidation in bulk solution and surface oxidation: Effect of activated carbon dosage and pH.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,26(10),2095-2105.
MLA Xing, Linlin,et al."Activated carbon enhanced ozonation of oxalate attributed to HO center dot oxidation in bulk solution and surface oxidation: Effect of activated carbon dosage and pH".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 26.10(2014):2095-2105.
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