DOI: 10.1016/j.watres.2017.10.073
Scopus记录号: 2-s2.0-85033475092
论文题名: Evidence of co-metabolic bentazone transformation by methanotrophic enrichment from a groundwater-fed rapid sand filter
作者: Hedegaard M.J. ; Deliniere H. ; Prasse C. ; Dechesne A. ; Smets B.F. ; Albrechtsen H.-J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 105
结束页码: 114
语种: 英语
英文关键词: Bentazone
; Co-metabolism
; Degradation
; Methane oxidation
; Pesticides
Scopus关键词: Aquifers
; Bandpass filters
; Degradation
; Groundwater resources
; Hydrogeology
; Mass spectrometry
; Metabolism
; Oxidation
; Pesticides
; Potable water
; Sand
; Waterworks
; Bentazone
; Co metabolisms
; Co-metabolic degradation
; Drinking water production
; High resolution mass spectrometry
; Methane oxidation
; Microcosm experiments
; Transformation products
; Methane
; acetylene
; bentazon
; ground water
; methane
; methane monooxygenase
; oxygen
; tap water
; bentazon
; benzothiadiazine derivative
; ground water
; herbicide
; silicon dioxide
; biodegradation
; chemical compound
; concentration (composition)
; enrichment
; experimental study
; filter
; groundwater
; herbicide
; metabolism
; methane
; methanotrophy
; oxidation
; pollutant removal
; transformation
; Article
; bacterial growth
; biomass
; enzyme activity
; mass spectrometry
; methanotroph
; microcosm
; nonhuman
; oxidation
; oxygen consumption
; priority journal
; real time polymerase chain reaction
; bioreactor
; bioremediation
; evaluation study
; filtration
; metabolism
; oxidation reduction reaction
; procedures
; water management
; Benzothiadiazines
; Biodegradation, Environmental
; Bioreactors
; Filtration
; Groundwater
; Herbicides
; Methane
; Oxidation-Reduction
; Silicon Dioxide
; Water Purification
英文摘要: The herbicide bentazone is recalcitrant in aquifers and is therefore frequently detected in wells used for drinking water production. However, bentazone degradation has been observed in filter sand from a rapid sand filter at a waterworks with methane-rich groundwater. Here, the association between methane oxidation and removal of bentazone was investigated with a methanotrophic enrichment culture derived from methane-fed column reactors inoculated with that filter sand. Several independent lines of evidence obtained from microcosm experiments with the methanotrophic enrichment culture, tap water and bentazone at concentrations below 2 mg/L showed methanotrophic co-metabolic bentazone transformation: The culture removed 53% of the bentazone in 21 days in presence of 5 mg/L of methane, while only 31% was removed in absence of methane. Addition of acetylene inhibited methane oxidation and stopped bentazone removal. The presence of bentazone partly inhibited methane oxidation since the methane consumption rate was significantly lower at high (1 mg/L) than at low (1 μg/L) bentazone concentrations. The transformation yield of methane relative to bentazone normalized by their concentration ratio ranged from 58 to 158, well within the range for methanotrophic co-metabolic degradation of trace contaminants calculated from the literature, with normalized substrate preferences varying from 3 to 400. High-resolution mass spectrometry revealed formation of the transformation products (TPs) 6-OH, 8-OH, isopropyl-OH and di-OH-bentazone, with higher abundances of all TPs in the presence of methane. Overall, we found a suite of evidence all showing that bentazone was co-metabolically transformed to hydroxy-bentazone by a methanotrophic culture enriched from a rapid sand filter at a waterworks. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113123
Appears in Collections: 气候减缓与适应
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作者单位: DTU Environment, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark; Department of Civil and Environmental, Engineering University of California, Berkeley, CA 94720, United States; Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD 21218, United States
Recommended Citation:
Hedegaard M.J.,Deliniere H.,Prasse C.,et al. Evidence of co-metabolic bentazone transformation by methanotrophic enrichment from a groundwater-fed rapid sand filter[J]. Water Research,2018-01-01,129