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Tytuł:
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Efficient removal of refractory organics in landfill leachate concentrates by electrocoagulation in tandem with simultaneous electro-oxidation and in-situ peroxone.
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Autorzy:
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Soomro GS; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space & Environment, Beihang University, Beijing, 102206, China; University of Science and Technology Beijing, Beijing, 100083, China.
Qu C; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space & Environment, Beihang University, Beijing, 102206, China.
Ren N; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space & Environment, Beihang University, Beijing, 102206, China.
Meng S; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space & Environment, Beihang University, Beijing, 102206, China.
Li X; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space & Environment, Beihang University, Beijing, 102206, China.
Liang D; Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space & Environment, Beihang University, Beijing, 102206, China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China. Electronic address: .
Zhang S; Beijing Drainage Group Co. Ltd (BDG), Beijing, 100044, China.
Li Y; Beijing Drainage Group Co. Ltd (BDG), Beijing, 100044, China.
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Źródło:
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Environmental research [Environ Res] 2020 Apr; Vol. 183, pp. 109249. Date of Electronic Publication: 2020 Feb 14.
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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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Publication: <2000- > : Amsterdam : Elsevier
Original Publication: New York, Academic Press.
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MeSH Terms:
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Electrocoagulation*
Waste Disposal, Fluid*
Water Pollutants, Chemical*
Electrodes ; Hydrogen Peroxide ; Iron ; Oxidation-Reduction
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Contributed Indexing:
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Keywords: Electrocoagulation; Energy consumption; Leachate concentrates; Refractory organics; Simultaneous electro-oxidation and in-situ peroxone
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Substance Nomenclature:
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0 (Water Pollutants, Chemical)
BBX060AN9V (Hydrogen Peroxide)
E1UOL152H7 (Iron)
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Entry Date(s):
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Date Created: 20200422 Date Completed: 20200911 Latest Revision: 20200911
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Update Code:
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20240105
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DOI:
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10.1016/j.envres.2020.109249
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PMID:
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32311906
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Leachate concentrates, an effluent produced from nanofiltration and/or reverse osmosis, contains a high amount of salts and dissolved organics especially refractory organics. Thus, the treatment of leachate concentrates would consume high energy or a large amount of chemicals. The present study is to develop an effective treatment method by using coupled electrochemical methods with the least possible energy consumption. The leachate concentrates was pretreated by electrocoagulation (EC), with aluminum or iron electrodes as anodes, to decrease the dissolved organic content. EC with Al electrode was found to be more efficient by consuming 1.25 kWh/m 3 energy to remove 70% of total organic carbon (TOC). EC effluent was further subjected to a novel simultaneous electro-oxidation and in-situ peroxone process, which used a Ti-based nickel and antimony doped tin dioxide (NATO) as anode and a carbon nanotube coated carbon-polytetrafluoroethylene (CNT-C/PTFE) as cathode for oxygen reduction reaction (ORR). Compared with a traditional EO with cathode for hydrogen evolution reaction (HER-EO), ORR-EO obtained higher efficiency and an energy consumption of 26.25 kWh/m 3 , which was much lower than 35.5 kWh/m 3 for HER-EO. Results showed that after ORR-EO, a final TOC of 57.3 mg/L was obtained. Thus, EC in tandem with ORR-EO process has an excellent capability and economic merit in the field of treating leachate concentrates.
Competing Interests: Declaration of competing interest There are no conflicts to declare.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
