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Tytuł:
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Fe 3 O 4 accelerates tetracycline degradation during anaerobic digestion: Synergistic role of adsorption and microbial metabolism.
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Autorzy:
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Zhao Z; School of Ecology and Environment, Zhengzhou University, Kexue Road 100, Zhengzhou 450001, China.
Zhang G; School of Water Conservancy Science and Engineering, Zhengzhou University, Kexue Road 100, Zhengzhou 450001, China.
Zhang Y; Key Laboratory of Industrial Ecology and Envronmental Engineering (Ministry of Education), Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Dou M; School of Ecology and Environment, Zhengzhou University, Kexue Road 100, Zhengzhou 450001, China.
Li Y; School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, China. Electronic address: .
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Źródło:
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Water research [Water Res] 2020 Oct 15; Vol. 185, pp. 116225. Date of Electronic Publication: 2020 Jul 24.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Oxford, Pergamon Press.
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MeSH Terms:
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Anti-Bacterial Agents*
Tetracycline*
Adsorption ; Anaerobiosis ; Bacteria/genetics
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Contributed Indexing:
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Keywords: Adsorption; Fe(3)O(4); Syntrophic metabolism; Tetracycline
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Substance Nomenclature:
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0 (Anti-Bacterial Agents)
F8VB5M810T (Tetracycline)
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Entry Date(s):
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Date Created: 20200801 Date Completed: 20201021 Latest Revision: 20201021
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Update Code:
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20240104
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DOI:
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10.1016/j.watres.2020.116225
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PMID:
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32736283
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Antibiotics contaminants, for example, tetracycline (TC) in the environment have attracted extensive attention around the world, and appropriate treatments for such contaminants are urgently required. In this study, five groups of anaerobic reactors supplemented with different amounts of Fe 3 O 4 were operated periodically to investigate their performance on TC removal. The results showed that Fe 3 O 4 effectively promoted TC removal. Compared with the control reactor, the TC removal efficiency was increased by 7.3% when co-digested with glucose, and increased by 40.4% when mono TC was digested in reactors with 5.0 g/L Fe 3 O 4 . Further analysis indicated that the probable mechanism of Fe 3 O 4 promoting TC removal was through TC being adsorbed from the liquid onto Fe 3 O 4 , making TC more available for microbes to be biodegraded. Microbial community analysis indicated that the bacteria (Klebsiella, Pseudomonas, and Escherichia) related to TC removal were enriched, which meant more pathways for TC removal were available following the addition of Fe 3 O 4 . In addition, in the Fe 3 O 4 -supplemented reactors, syntrophic metabolism (between Desulfovibrio and Methanobacterium, Azonexus and Methanobacterium) were possibly established, which played an important role in improving TC removal and CH 4 production. The electron transport system data further confirmed these results. The functional gene classification for Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis demonstrated that the dominant functions enhanced by Fe 3 O 4 supplementation was microbial metabolic activities.
Competing Interests: Declaration of Competing Interest The authors declare no competing interests.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
