DOI: 10.1016/j.watres.2018.11.004
Scopus记录号: 2-s2.0-85056222081
论文题名: Anode materials for sulfide oxidation in alkaline wastewater: An activity and stability performance comparison
作者: Ntagia E. ; Fiset E. ; da Silva Lima L. ; Pikaar I. ; Zhang X. ; Jeremiasse A.W. ; Prévoteau A. ; Rabaey K.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 111
结束页码: 119
语种: 英语
英文关键词: Alkaline streams
; Electrochemistry
; Mixed metal oxide anodes
; Resource recovery
; Sulfide
; Zero-chemical
Scopus关键词: Alkalinity
; Anodes
; Catalyst activity
; Catalytic oxidation
; Coated materials
; Economic and social effects
; Efficiency
; Electrocatalysts
; Electrochemistry
; Lead compounds
; Metal recovery
; Oxidation
; Platinum compounds
; Ruthenium
; Sodium sulfide
; Stability
; Sulfur compounds
; Tantalum compounds
; Titanium dioxide
; Titanium oxides
; Waste treatment
; Alkaline conditions
; Alkaline streams
; Coulombic efficiency
; Mixed metal oxide
; Resource recovery
; Stability performance
; Sulfide
; Sulfide concentration
; Iridium compounds
; metal oxide
; sulfide
; sulfur
; titanium
; catalyst
; comparative study
; electrochemistry
; electrode
; oxidation
; performance assessment
; pollutant removal
; recovery
; stream
; sulfide
; wastewater treatment
; alkalinity
; Article
; concentration (parameters)
; current density
; oxidation
; priority journal
; waste water
英文摘要: Electrochemical sulfide removal can be attractive as a zero-chemical-input approach for treatment of waste streams such as spent caustics coupled to caustic recovery. A key concern is possible decline in catalytic activity, due to passivation from deposited elemental sulfur (S0) on the anode surface and stability limitation, due to sulfide oxidation under highly alkaline conditions. In this study, six commercially available electrode materials (Ir Mixed Metal Oxide (MMO), Ru MMO, Pt/IrOx, Pt, PbOx and TiO2/IrTaO2 coated titanium-based electrodes) were tested to investigate the impact of the electrocatalyst on the process efficiency in terms of sulfide removal and final product of sulfide oxidation, as well as to determine the stability of the electrocatalyst under high sulfide concentrations (50 mM Na2S) and high alkalinity (pH > 12). Short-term experiments showed that the catalyst type impacts the anode potential and the sulfide oxidation reaction products. Longer-term experiments under current densities up to 200 A m−2 showed a high differentiation in stability performance among the catalysts. Ru MMO was the most active towards sulfide oxidation with a coulombic efficiency of 63.2 ± 0.5% at an average anode potential of 0.92 ± 0.17 V vs SHE. Ir MMO was the most stable, preserving 100% of its original catalyst loading during the tests. The results demonstrated that Ru MMO and Ir MMO were the most suitable electrode materials for sulfide oxidation under highly alkaline conditions, while the need for establishing a good trade-off between activity, stability and cost still persists. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122172
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, Gent, 9000, Belgium; The University of Queensland, The School of Civil Engineering, Brisbane, QLD 4072, Australia; Magneto Special Anodes (an Evoqua Brand), Calandstraat 109, Schiedam, BA 3125, Netherlands
Recommended Citation:
Ntagia E.,Fiset E.,da Silva Lima L.,et al. Anode materials for sulfide oxidation in alkaline wastewater: An activity and stability performance comparison[J]. Water Research,2019-01-01