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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

文献类型：期刊论文

作者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
刊名JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
出版日期2014-10-01
卷号26期号:10页码:2095-2105
关键词Activated carbon Oxalate Ozonation Hydroxyl radicals Surface oxidation Catalytic ozonation
ISSN号1001-0742
其他题名J. Environ. Sci.
中文摘要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.
英文摘要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.
WOS标题词Science & Technology ; Life Sciences & Biomedicine
类目[WOS]Environmental Sciences
研究领域[WOS]Environmental Sciences & Ecology
关键词[WOS]CATALYTIC OZONATION ; AQUEOUS-PHASE ; OXALIC-ACID ; OZONE DECOMPOSITION ; HYDROGEN-PEROXIDE ; WATER-TREATMENT ; RATE CONSTANTS ; OH-RADICALS ; DEGRADATION ; KINETICS
收录类别SCI
原文出处://WOS:000343780700017
语种英语
WOS记录号WOS:000343780700017
公开日期2014-12-01
源URL[http://ir.ipe.ac.cn/handle/122111/11691]  
专题过程工程研究所_研究所（批量导入）
作者单位1.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
推荐引用方式
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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来源：过程工程研究所

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