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Raman spectroscopic technique towards understanding the degradation of phenol by sodium persulfate in hot compressed water
Wang, Junliang1; Zheng, Weicheng1; Zhang, Yuqing1; Song, Shuang1; Chou, I-Ming2; Hu, Mian1; Pan, Zhiyan1
2020-10-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume257Pages:11
AbstractDegradation of phenol by sodium persulfate (SPS) in hot compressed water (HCW) was investigated in a lab-built fused quartz tube reactor (FQTR) coupled with Raman spectroscopy system. The species of S2O82-, SO42-, HSO4-, SO32- and HSO3- in the reaction system were qualitatively and quantitatively analyzed by Raman spectroscopy. The hydrothermal stability of phenol and SPS at different temperature and the degradation of phenol by SPS were also studied. The results indicated that phenol was not stable in aqueous solution above 200 degrees C, and that only SO42- was generated in the hydrolysis of SPS at temperatures below 50 degrees C, and SO42- and HSO4- were generated at higher temperatures. The maximum conversion rate (90.93%) and mineralization efficiency (38.88%) of phenol by SPS was obtained at reaction temperature of 300 degrees C with 180 min reaction time. During the degradation of phenol by SPS, HSO4- was the main product and S* (not detected by Raman spectroscopy) exhibits a positive correlation with temperature. In addition, a degradation pathway of phenol by SPS was proposed. The degradation data for the kinetic analysis indicated that the reaction followed pseudo first-order kinetics, and the reaction rate constants (k(s)) were given as k(50) degrees(C) = 0.0083 min(-1), k(100) degrees(C) = 0.0197 min(-1), k(200) degrees(C) = 0.0498 min(-1), k(300) degrees(C) = 0.0619 min(-1) and k(400) degrees(C) = 0.0505 min(-1) at 30 min reaction. Moreover, the activation energy (12.580 kJ mol(-1)), the enthalpy change (9.064 kJ mol(-1)) and the entropy change (-222.104 J mol(-1)) of the reaction were also calculated. (C) 2020 Elsevier Ltd. All rights reserved.
KeywordRaman spectroscopy Hot compressed water Fused quartz tube reactor Phenol Sodium persulfate
DOI10.1016/j.chemosphere.2020.127264
Indexed BySCI ; SCI
Funding OrganizationNatural Science Foundation of China ; Natural Sciences Foundation of Zhejiang Province of China ; Key Frontier Science Program of the Chinese Academy of Sciences
Language英语
Funding ProjectNatural Science Foundation of China[41977304] ; Natural Sciences Foundation of Zhejiang Province of China[LY17D030002] ; Key Frontier Science Program of the Chinese Academy of Sciences[QYZDY-SSW-DQC008]
WOS KeywordSUPERCRITICAL WATER ; ACTIVATED PERSULFATE ; WASTE-WATER ; CORROSION BEHAVIOR ; HYDROGEN SULFATE ; AQUEOUS-SOLUTION ; P-NITROPHENOL ; OXIDATION ; MECHANISM ; KINETICS
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000551668200093
PublisherPERGAMON-ELSEVIER SCIENCE LTD
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Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/7834
Collection深海科学研究部_深海极端环境模拟研究实验室
Corresponding AuthorHu, Mian; Pan, Zhiyan
Affiliation1.Zhejiang Univ Technol, Coll Environm, Hangzhou 310032, Zhejiang, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Hainan, Peoples R China
Recommended Citation
GB/T 7714
Wang, Junliang,Zheng, Weicheng,Zhang, Yuqing,et al. Raman spectroscopic technique towards understanding the degradation of phenol by sodium persulfate in hot compressed water[J]. CHEMOSPHERE,2020,257:11.
APA Wang, Junliang.,Zheng, Weicheng.,Zhang, Yuqing.,Song, Shuang.,Chou, I-Ming.,...&Pan, Zhiyan.(2020).Raman spectroscopic technique towards understanding the degradation of phenol by sodium persulfate in hot compressed water.CHEMOSPHERE,257,11.
MLA Wang, Junliang,et al."Raman spectroscopic technique towards understanding the degradation of phenol by sodium persulfate in hot compressed water".CHEMOSPHERE 257(2020):11.
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