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Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles
Zhang, J; Sun, B; Huang, YY; Guan, XH; Guan, XH (reprint author), Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China.
2015
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume141Pages:154—161
Subtype期刊文献
AbstractThis study developed a heterogeneous catalytic permanganate oxidation system with three molecular sieves, i.e., nanosized ZSM-5 (ZSM-5A), microsized ZSM-5 (ZSM-5B) and MCM-41, supported ruthenium nanoparticles as catalyst, denoted as Ru/ZSM-5A, Ru/ZSM-5B and Ru/MCM-41, respectively. The presence of 0.5 g L-1 Ru/ZSM-5A, Ru/ZSM-5B and Ru/MCM-41 increased the oxidation rate of sulfamethoxazole (SMX) by permanganate at pH 7.0 by 27-1144 times. The catalytic performance of Ru catalysts toward SMX oxidation by permanganate was strongly dependent on Ru loading on the catalysts. The X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) analyses confirmed that Ru catalyst acted as an electron shuttle in catalytic permanganate oxidation process. Ru-VII deposited on the surface of catalysts was oxidized by permanganate to its higher oxidation state Ru-VII, which could work as a co-oxidant with permanganate to decompose SMX and was then reduced to its initial tri-valence. During the successive runs, Ru/ZSM-5A could not maintain its catalytic activity due to the deposition of MnO2, which was the reductive product of permanganate, onto the surface of Ru/ZSM-5A. Thus, the regeneration of partially deactivated Ru catalysts by reductant NH2OH.HCl or ascorbic acid was proposed. Ru/ZSM-5A regenerated by NH2OH.HCl displayed comparable catalytic ability to its virgin counterpart, while ascorbic acid could not completely remove the deposited MnO2. A trace amount of leaching of Ru into the reaction solution was also observed, which would be ameliorated by improving the preparation conditions in the future study. (C) 2015 Elsevier Ltd. All rights reserved.
KeywordPotassium-permanganate Chlorine Dioxide Bisphenol-a Catalysts Kinetics Reduction Spectroscopy Chemicals Removal Phenol
Indexed BySCI
Language英语
WOS IDWOS:000363824400022
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24880
Collection中科院上海应用物理研究所2011-2019年
Corresponding AuthorGuan, XH (reprint author), Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, J,Sun, B,Huang, YY,et al. Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles[J]. CHEMOSPHERE,2015,141:154—161.
APA Zhang, J,Sun, B,Huang, YY,Guan, XH,&Guan, XH .(2015).Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles.CHEMOSPHERE,141,154—161.
MLA Zhang, J,et al."Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles".CHEMOSPHERE 141(2015):154—161.
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