DOI: 10.1016/j.watres.2018.06.012
Scopus记录号: 2-s2.0-85049307776
论文题名: Extracellular degradation of tetrabromobisphenol A via biogenic reactive oxygen species by a marine Pseudoalteromonas sp.
作者: Gu C. ; Wang J. ; Guo M. ; Sui M. ; Lu H. ; Liu G.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 354
结束页码: 362
语种: 英语
英文关键词: Coastal pollution
; Cometabolism
; Marine bacterium
; Reactive oxygen species
; Tetrabromobisphenol A
Scopus关键词: Amino acids
; Bacteria
; Biodegradability
; Bioremediation
; Enzyme activity
; Marine pollution
; Organic pollutants
; Oxygen
; Co metabolisms
; Coastal pollution
; Marine bacterium
; Reactive oxygen species
; Tetrabromobisphenol A
; Biodegradation
; hydrogen peroxide
; hydroxyl radical
; oxygen
; reactive oxygen metabolite
; reduced nicotinamide adenine dinucleotide dehydrogenase (quinone)
; siderophore
; superoxide
; tetrabromobisphenol A
; anoxic conditions
; bacterium
; biodegradation
; biotechnology
; chemical compound
; degradation
; gene expression
; marine environment
; marine pollution
; metabolism
; oxidation
; phenolic compound
; reactive oxygen species
; Article
; biodegradability
; bioremediation
; cell metabolism
; coastal waters
; controlled study
; debromination
; marine bacterium
; marine environment
; metabolism
; microbial degradation
; nonhuman
; oxidation
; oxidative stress
; pH
; priority journal
; Pseudoalteromonas
; sea pollution
; Bacteria (microorganisms)
; Pseudoalteromonas
; Pseudoalteromonas sp.
英文摘要: Tetrabromobisphenol A (TBBPA) has attracted considerable attention due to its ubiquitous presence in different environmental compartments worldwide. However, information on its aerobic biodegradability in coastal environments remains unknown. Here, the aerobic biodegradation of TBBPA using a Pseudoalteromonas species commonly found in the marine environment was investigated. We found that extracellular biogenic siderophore, superoxide anion radical (O2 •−), hydrogen peroxide (H2O2), and hydroxyl radical (•OH) were involved in TBBPA degradation. Upregulation of genes (nqrA and lodA) encoding Na+-translocating NADH-quinone oxidoreductase and L-lysine-ε-oxidase supported the extracellular O2 •− and H2O2 production. The underlying mechanism of TBBPA biodegradation presumably involves both O2 •− reduction and •OH-based advanced oxidation process (AOP). Furthermore, TBBPA intermediates of tribromobisphenol A, 4-isopropylene-2,6-dibromophenol, 4-(2-hydroxyisopropyl)-2,6-dibromophenol, 2,4,6-tribromophenol (TBP), 4-hydroxybenzoic acid, and 2-bromobenzoic acid were detected in the culture medium. Debromination and β-scission pathways of TBBPA biodegradation were proposed. Additionally, membrane integrity assays revealed that the increase of intracellular catalase (CAT) activity and the extracellular polymeric substances (EPS) might account for the alleviation of oxidative damage. These findings could deepen understanding of the biodegradation mechanism of TBBPA and other related organic pollutants in coastal and artificial bioremediation systems. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112615
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
Recommended Citation:
Gu C.,Wang J.,Guo M.,et al. Extracellular degradation of tetrabromobisphenol A via biogenic reactive oxygen species by a marine Pseudoalteromonas sp.[J]. Water Research,2018-01-01,142