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Tytuł:
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Electrocatalytic dechlorination of halogenated antibiotics via synergistic effect of chlorine-cobalt bond and atomic H.
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Autorzy:
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Liu T; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
Luo J; Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, GA 30332, United States.
Meng X; Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, GA 30332, United States.
Yang L; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
Liang B; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Liu M; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
Liu C; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China. Electronic address: chem_.
Wang A; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Liu X; Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, China.
Pei Y; Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, China.
Yuan J; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
Crittenden J; Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, GA 30332, United States.
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Źródło:
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Journal of hazardous materials [J Hazard Mater] 2018 Sep 15; Vol. 358, pp. 294-301. Date of Electronic Publication: 2018 Jul 03.
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Typ publikacji:
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Journal Article; Research Support, Non-U.S. Gov't
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Język:
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English
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Imprint Name(s):
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Original Publication: Amsterdam : Elsevier,
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MeSH Terms:
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Electrolysis*
Anti-Bacterial Agents/*analysis
Chlorine/*chemistry
Cobalt/*chemistry
Hydrogen/*chemistry
Water Pollutants, Chemical/*analysis
Water Purification/*methods
Catalysis ; Electrodes ; Halogenation ; Oxides/chemistry ; Phosphorus/chemistry
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Contributed Indexing:
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Keywords: Atomic H*; CoCl bond; Electroreductive dechlorination; Halogenated antibiotics; Synergistic effect
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Substance Nomenclature:
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0 (Anti-Bacterial Agents)
0 (Oxides)
0 (Water Pollutants, Chemical)
27YLU75U4W (Phosphorus)
3G0H8C9362 (Cobalt)
4R7X1O2820 (Chlorine)
7YNJ3PO35Z (Hydrogen)
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Entry Date(s):
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Date Created: 20180711 Date Completed: 20191107 Latest Revision: 20191107
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Update Code:
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20240105
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DOI:
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10.1016/j.jhazmat.2018.06.064
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PMID:
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29990817
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Although noble metal electrocatalysts are highly efficient in the dehalogenation of halogenated antibiotics, the prohibitive cost hinders their practical applications. In this study, a cobalt-phosphorous/oxide (CoP/O) composite prepared via a one-step electrodeposition was for the first time applied in electroreductive dechlorination of halogenated antibiotics (HA), including chloramphenicol (CAP), florfenicol (FLO) and thiamphenicol (TAP). CoP/O had a higher FLO dechlorination efficiency (91%) than Pd/C (69.3%) (t = 60 min, C 0 = 20 mg L -1 , applied voltage of -1.2 V vs. saturated calomel electrode (SCE)). Furthermore, the dechlorination efficiencies of CoP/O for CAP and TAP reached to 98.7 and 74.2%, respectively. The electron spin resonance and in situ Raman characterizations confirmed that atomic H* was produced via the CoP and the formation of CoCl bonds occurred on the CoO in CoP/O. The CoCl bond formation could trap HA molecules onto CoP/O and weaken the CCl bond strength. The synergistic effect of H* attack and CoCl bond was responsible for the high dechlorination efficiency. This study offers new insights into the interface mechanism of electroreductive dehalogenation process, and shows a great potential for the remediation of halogenated antibiotics contaminated wastewater.
(Copyright © 2018 Elsevier B.V. All rights reserved.)