DOI: 10.1016/j.watres.2017.12.070
Scopus记录号: 2-s2.0-85039970452
论文题名: Mineralization of organic pollutants by anodic oxidation using reactive electrochemical membrane synthesized from carbothermal reduction of TiO2
作者: Trellu C. ; Coetsier C. ; Rouch J.-C. ; Esmilaire R. ; Rivallin M. ; Cretin M. ; Causserand C.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 131 起始页码: 310
结束页码: 319
语种: 英语
英文关键词: Anodic oxidation
; Electro-oxidation
; Mineralization
; Organic pollutants
; Reactive electrochemical membrane
; Sub-stoichiometric titanium oxide
Scopus关键词: Carbon
; Carbothermal reduction
; Efficiency
; Electron transitions
; Electrooxidation
; Filtration
; Membranes
; Microfiltration
; Mineralogy
; Organic acids
; Organic carbon
; Organic pollutants
; Oxalic acid
; Oxidation
; Pollution
; Reduction
; Titanium compounds
; Titanium dioxide
; Titanium oxides
; Cross flow filtration
; Direct electron transfer
; Electrochemical membranes
; Membrane permeability
; Mineralization
; Mineralization current efficiencies
; Transmembrane pressures
; Transport of pollutants
; Anodic oxidation
; oxalic acid
; paracetamol
; phenol
; titanium dioxide
; biomineralization
; concentration (composition)
; electrochemistry
; filtration
; mass transport
; membrane
; optimization
; organic pollutant
; oxidation
; oxide group
; permeability
; reduction
; stoichiometry
; Article
; concentration (parameters)
; current density
; electron transport
; membrane
; membrane permeability
; mineralization
; oxidation
; pollutant
; priority journal
; reactive electrochemical membrane
; reduction (chemistry)
; synthesis
; thermodynamics
英文摘要: Reactive Electrochemical Membrane (REM) prepared from carbothermal reduction of TiO2 is used for the mineralization of biorefractory pollutants during filtration operation. The mixture of Ti4O7 and Ti5O9 Magnéli phases ensures the high reactivity of the membrane for organic compound oxidation through •OH mediated oxidation and direct electron transfer. In cross-flow filtration mode, convection-enhanced mass transport of pollutants can be achieved from the high membrane permeability (3300 LMH bar−1). Mineralization efficiency of oxalic acid, paracetamol and phenol was assessed as regards to current density, transmembrane pressure and feed concentration. Unprecedented high removal rates of total organic carbon and mineralization current efficiency were achieved after a single passage through the REM, e.g. 47 g m−2 h−1 – 72% and 6.7 g m−2 h−1 – 47% for oxalic acid and paracetamol, respectively, at 15 mA cm−2. However, two mechanisms have to be considered for optimization of the process. When the TOC flux is too high with respect to the current density, aromatic compounds polymerize in the REM layer where only direct electron transfer occurs. This phenomenon decreases the oxidation efficiency and/or increases REM fouling. Besides, O2 bubbles sweeping at high permeate flux promotes O2 gas generation, with adverse effect on oxidation efficiency. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113015
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France; Institut Européen des Membranes, UMR 5635 (CNRS-ENSCM-UM), Montpellier, France
Recommended Citation:
Trellu C.,Coetsier C.,Rouch J.-C.,et al. Mineralization of organic pollutants by anodic oxidation using reactive electrochemical membrane synthesized from carbothermal reduction of TiO2[J]. Water Research,2018-01-01,131