DOI: 10.1016/j.watres.2018.03.037
Scopus记录号: 2-s2.0-85046011399
论文题名: Effective phosphate removal for advanced water treatment using low energy, migration electric–field assisted electrocoagulation
作者: Tian Y. ; He W. ; Liang D. ; Yang W. ; Logan B.E. ; Ren N.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 138 起始页码: 129
结束页码: 136
语种: 英语
英文关键词: Air-cathode
; Aluminum electrode
; Electrocoagulation
; Energy efficiency
; Iron electrode
; Wastewater treatment
Scopus关键词: Aluminum
; Anodes
; Cathodes
; Cathodic protection
; Chemicals removal (water treatment)
; Clarification
; Coagulation
; Effluent treatment
; Effluents
; Electric fields
; Electrochemical electrodes
; Energy efficiency
; Energy utilization
; Graphite electrodes
; Iron
; Phosphorus
; Titanium
; Wastewater treatment
; Air cathode
; Aluminum electrodes
; Constant current density
; Domestic wastewater
; Electro coagulations
; Iron electrodes
; Primary clarifiers
; Sacrificial anodes
; Iron removal (water treatment)
; aluminum
; graphite
; iron
; nitrogen
; phosphate
; phosphorus
; titanium
; water
; phosphate
; coagulation
; electric field
; electrochemical method
; electrode
; energy efficiency
; ion
; phosphate
; pollutant removal
; precipitation (chemistry)
; wastewater
; wastewater treatment
; water treatment
; Article
; comparative study
; controlled study
; current density
; electrocoagulation
; energy
; energy consumption
; migration electric field assisted electrocoagulation
; nutrient solution
; priority journal
; scanning electron microscopy
; sediment
; water treatment
; X ray photoelectron spectroscopy
; chemistry
; electricity
; electrochemical analysis
; electrode
; flocculation
; procedures
; sewage
; waste water
; water pollutant
; Aluminum
; Electricity
; Electrochemical Techniques
; Electrodes
; Flocculation
; Iron
; Phosphates
; Titanium
; Waste Disposal, Fluid
; Waste Water
; Water Pollutants, Chemical
英文摘要: A migration electric–field assisted electrocoagulation (MEAEC) system was developed to increase phosphate removal from domestic wastewater, with reduced energy consumption, using a titanium charging (inert) electrode and a sacrificial iron anode. In the MEAEC, an electric field was applied between the inert electrode (titanium) and an air cathode to drive migration of phosphate anions towards the sacrificial anode. Current was then applied between the sacrificial anode (Fe or Al mesh) and the air cathode to drive electrocoagulation of phosphate. A MEAEC with the Fe electrode using primary clarifier effluent achieved 98% phosphate removal, producing water with a total phosphorus of 0.3 mg/L with <6 min total treatment time (five cycles; each 10 s inert electrode charging, and 1 min electrocoagulation), at a constant current density of 1 mA/cm2. In the absence of the 10 s charging time, electrocoagulation required 15 min for the same removal. With an aluminum anode and the same phosphorus removal, the MEAEC required 7 cycles (7 min total treatment, 1 min 10 s total charging), while conventional electrocoagulation required 20 min. The energy demand of Fe-MEAEC was only 0.039 kWh/m3 for 98% phosphate removal, which was 35% less than with the Al-MEAEC of 0.06 kWh/m3, and 28% less than that previously obtained using an inert graphite electrode. Analysis of the precipitate showed that a less porous precipitate was obtained with the Al anode than with the Fe anode. The phosphorus in precipitate of Fe-MEAEC was identified as PO4 3− and HPO4 2−, while the Fe was present as both Fe2+ and Fe3+. Only HPO4 2− and Al3+ were identified in the precipitate of the Al-MEAEC. These results indicated that the MEAEC with a titanium inert charging electrode and iron anode could achieve the most efficient phosphate removal with very low energy demands, compared to previous electrochemical approaches. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112796
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin, 150090, China; School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China; Department of Civil & Environmental Engineering, Penn State University, 231Q Sackett Building, University ParkPA 16802, United States
Recommended Citation:
Tian Y.,He W.,Liang D.,et al. Effective phosphate removal for advanced water treatment using low energy, migration electric–field assisted electrocoagulation[J]. Water Research,2018-01-01,138