DOI: 10.1016/j.watres.2018.12.055
Scopus记录号: 2-s2.0-85060206326
论文题名: Capturing the oxic transformation of iopromide – A useful tool for an improved characterization of predominant redox conditions and the removal of trace organic compounds in biofiltration systems?
作者: Müller J. ; Jewell K.S. ; Schulz M. ; Hermes N. ; Ternes T.A. ; Drewes J.E. ; Hübner U.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 274
结束页码: 284
语种: 英语
英文关键词: Biofiltration
; Iopromide
; Redox conditions
; Sequential biofiltration
; Trace organic chemicals
; Transformation products
Scopus关键词: Biofilters
; Biofiltration
; Contrast media
; Dissolved oxygen
; Organic compounds
; Biological transformation
; Dimensionless parameters
; Iodinated contrast medium
; Iopromide
; Redox condition
; Trace organic chemicals
; Trace organic compounds
; Transformation products
; Organic chemicals
; benzotriazole derivative
; dissolved oxygen
; gabapentin
; iopromide
; metoprolol
; organic compound
; biofiltration
; biotechnology
; biotransformation
; chemical composition
; concentration (composition)
; dissolved oxygen
; microbial activity
; nitrate
; organic pollutant
; pollutant removal
; redox conditions
; tracer
; Article
; biofiltration
; biotransformation
; microbial activity
; oxidation reduction reaction
; priority journal
英文摘要: The biological degradation of many trace organic compounds has been reported to be strongly redox dependent. The traditional characterization of redox conditions using the succession of inorganic electron acceptors such as dissolved oxygen and nitrate falls short in accurately describing the critical transition state between oxic and suboxic conditions. Novel monitoring strategies using intrinsic redox tracers might be suitable to close that gap. This study investigated the potential use of the successive biological transformation of the iodinated contrast medium iopromide as an intrinsic tracer of prevailing redox conditions in biofiltration systems. Iopromide degradation in biofiltration systems was monitored by quantifying twelve known biological transformation products formed under oxic conditions. A novel dimensionless parameter (TIOP) was introduced as a measure for the successive transformation of iopromide. A strong correlation between the consumption of dissolved oxygen and iopromide transformation emphasized the importance of general microbial activity on iopromide degradation. However, results disproved a direct correlation between oxic (>1 mg/L O2) and suboxic (<1 mg/L O2) conditions and the degree of iopromide transformation. Results indicated that besides redox conditions also the availability of biodegradable organic substrate affects the degree of iopromide transformation. Similar behavior was found for the compounds gabapentin and benzotriazole, while the oxic degradation of metoprolol remained stable under varying substrate conditions. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122006
Appears in Collections: 气候变化事实与影响
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作者单位: Technical University of Munich, Chair of Urban Water Systems Engineering, Am Coulombwall 3, Garching, 85748, Germany; Federal Institute of Hydrology, Mainzer Tor 1, Koblenz, 56068, Germany
Recommended Citation:
Müller J.,Jewell K.S.,Schulz M.,et al. Capturing the oxic transformation of iopromide – A useful tool for an improved characterization of predominant redox conditions and the removal of trace organic compounds in biofiltration systems?[J]. Water Research,2019-01-01