DOI: 10.1016/j.watres.2017.10.048
Scopus记录号: 2-s2.0-85032263267
论文题名: Electrochemical Fenton-based treatment of tetracaine in synthetic and urban wastewater using active and non-active anodes
作者: Ridruejo C. ; Centellas F. ; Cabot P.L. ; Sirés I. ; Brillas E.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 128 起始页码: 71
结束页码: 81
语种: 英语
英文关键词: BDD
; Electro-Fenton
; Photoelectro-Fenton
; Product identification
; Tetracaine
; Urban wastewater
Scopus关键词: Anodes
; Anodic oxidation
; Boolean functions
; Byproducts
; Chlorine
; Coal tar
; Electrochemical oxidation
; Electrolytes
; Mineralogy
; Oxalic acid
; Photolysis
; Platinum compounds
; Reaction intermediates
; Ruthenium compounds
; Sodium sulfate
; Wastewater treatment
; Electro-fenton
; Photoelectro-Fenton
; Product identification
; Tetracaine
; Urban wastewater
; Chemicals removal (water treatment)
; carboxylic acid
; chlorine
; electrolyte
; ferrous gluconate
; fumaric acid
; hydrogen peroxide
; nitrogen
; oxalic acid derivative
; tetracaine
; water
; boron
; chlorine
; Fenton's reagent
; iron
; nitrogen
; tetracaine
; antibiotics
; biodegradation
; chemical compound
; concentration (composition)
; electrochemical method
; electrode
; electrokinesis
; hydrogen peroxide
; hydroxyl radical
; identification method
; ionic composition
; oxidation
; photolysis
; ultraviolet A radiation
; wastewater
; wastewater treatment
; Article
; chlorination
; deamination
; degradation
; density
; electrochemistry
; electrolysis
; high performance liquid chromatography
; hydroxylation
; mineralization
; oxidation
; pH
; photolysis
; priority journal
; reaction analysis
; surface property
; ultraviolet A radiation
; volume
; waste water
; waste water management
; analysis
; chemistry
; electrochemical analysis
; kinetics
; oxidation reduction reaction
; procedures
; ultraviolet radiation
; water management
; water pollutant
; Boron
; Chlorine
; Electrochemical Techniques
; Hydrogen Peroxide
; Iron
; Kinetics
; Nitrogen
; Oxidation-Reduction
; Photolysis
; Tetracaine
; Ultraviolet Rays
; Waste Water
; Water Pollutants, Chemical
; Water Purification
英文摘要: The electrochemical degradation of tetracaine hydrochloride has been studied in urban wastewater. Treatments in simulated matrix with similar ionic composition as well as in 0.050 M Na2SO4 were comparatively performed. The cell contained an air-diffusion cathode for H2O2 electrogeneration and an anode selected among active Pt, IrO2-based and RuO2-based materials and non-active boron-doped diamond (BDD). Electrochemical oxidation with electrogenerated H2O2 (EO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF) were comparatively assessed at pH 3.0 and constant current density. The pharmaceutical and its byproducts were oxidized by [rad]OH formed from water oxidation at the anode surface and in the bulk from Fenton's reaction, which occurred upon addition of 0.50 mM Fe2+ in all media, along with active chlorine originated from the anodic oxidation of Cl− contained in the simulated matrix and urban wastewater. The PEF process was the most powerful treatment regardless of the electrolyte composition, owing to the additional photolysis of intermediates by UVA radiation. The use of BDD led to greater mineralization compared to other anodes, being feasible the total removal of all organics from urban wastewater by PEF at long electrolysis time. Chlorinated products were largely recalcitrant when Pt, IrO2-based or RuO2-based anodes were used, whereas they were effectively destroyed by BDD([rad]OH). Tetracaine decay always obeyed a pseudo-first-order kinetics, being slightly faster with the RuO2-based anode in Cl− media because of the higher amounts of active chlorine produced. Total nitrogen and concentrations of NH4 +, NO3 −, ClO3 −, ClO4 − and active chlorine were determined to clarify the behavior of the different electrodes in PEF. Eight intermediates were identified by GC-MS and fumaric and oxalic acids were quantified as final carboxylic acids by ion-exclusion HPLC, allowing the proposal of a plausible reaction sequence for tetracaine mineralization by PEF in Cl−-containing medium. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113161
Appears in Collections: 气候减缓与适应
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作者单位: Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, Barcelona, 08028, Spain
Recommended Citation:
Ridruejo C.,Centellas F.,Cabot P.L.,et al. Electrochemical Fenton-based treatment of tetracaine in synthetic and urban wastewater using active and non-active anodes[J]. Water Research,2018-01-01,128