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Tytuł:
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The Role of Bacteria in the Formation and Migration of Oil-Particle Aggregates (OPAs) after Marine Oil Spills and the Associated Mechanism.
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Autorzy:
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Dong R; Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, People's Republic of China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China.
Wan Z; School of Marine Sciences, Sun Yat-sen University/Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, People's Republic of China.
Wang X; North China Sea Environmental Monitoring Center, State Oceanic Administration, Qingdao 266033, People's Republic of China.
Bai Y; School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.
Bao M; Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, People's Republic of China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China.
Li H; Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, People's Republic of China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China.
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Źródło:
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Environmental science & technology [Environ Sci Technol] 2023 May 02; Vol. 57 (17), pp. 7018-7028. Date of Electronic Publication: 2023 Apr 21.
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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: Washington DC : American Chemical Society
Original Publication: Easton, Pa. : American Chemical Society, c1967-
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MeSH Terms:
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Petroleum Pollution*
Water Pollutants, Chemical*/analysis
Petroleum*
Oils ; Water ; Minerals
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Contributed Indexing:
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Keywords: Bacteria; Depth of Penetration; Oil Spills; Oil−Particle Aggregates; Oil−Sediment−Microbe Coupling Mechanism; Vertical Migration
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Substance Nomenclature:
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0 (Water Pollutants, Chemical)
0 (Oils)
059QF0KO0R (Water)
0 (Minerals)
0 (Petroleum)
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Entry Date(s):
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Date Created: 20230421 Date Completed: 20230503 Latest Revision: 20230504
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Update Code:
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20240105
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DOI:
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10.1021/acs.est.3c00647
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PMID:
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37083415
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Oil spills interact with mineral particles to form oil-particle aggregates (OPAs), which promotes the oil's natural diffusion and biodegradation. We investigated the effect of bacteria on the formation and vertical migration of OPAs under different concentrations and types of particles and proposed and elucidated an oil-particle-bacteria coupling mechanism. The depth of particle penetration into oil droplets (13-17 μm) was more than twice that of the nonbacterial group. Oil that remained in the water column and deposited to the bottom decreased from 87% to 49% and increased from 14% to 15% at high/low concentration, respectively. Interestingly, the median droplet diameter showed a negative correlation ( R 2 = 0.83) and positive correlation ( R 2 = 0.60) at high/low concentration, respectively, with the relative penetration depth first proposed. We further demonstrated that bacteria increased the penetrating depth by a combination of reducing/increasing the interfacial tension, reducing the oil amount (C 17 -C 38 ) in the OPAs, and increasing the particle width. These effects reduced the droplet size and ultimately changed the vertical migration of OPAs. Finally, we provided a simple assessment of the vertical distribution of OPAs in nearshore environments based on experimental data and suggested that the role of bacteria in increasing the depth of particles penetrating into the oil droplets should not be ignored. These findings will broaden the research perspective of marine oil spill migration.