DOI: 10.1016/j.watres.2018.02.049
Scopus记录号: 2-s2.0-85042720033
论文题名: Phosphorus removal by in situ generated Fe(II): Efficacy, kinetics and mechanism
作者: Zhang J. ; Bligh M.W. ; Liang P. ; Waite T.D. ; Huang X.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 136 起始页码: 120
结束页码: 130
语种: 英语
英文关键词: Efficiency
; Ferrous iron
; In situ
; Kinetics
; Mechanism
; Phosphorus
Scopus关键词: Alkalinity
; Chlorine compounds
; Coprecipitation
; Efficiency
; Enzyme kinetics
; Kinetics
; Mechanisms
; pH
; Phosphorus
; Sulfur compounds
; Wastewater treatment
; Electrochemical Generation
; Ferric oxy-hydroxides
; Ferrous iron
; Kinetics and mechanism
; Municipal wastewaters
; Removal efficiencies
; Solid phase formation
; Thermodynamic modelling
; Iron compounds
; ferric phosphate
; ferrous chloride
; ferrous sulfate
; iron
; iron salt
; oxygen
; phosphorus
; ferric ion
; ferric oxyhydroxide
; ferrous ion
; phosphorus
; alkalinity
; dissolved oxygen
; efficiency measurement
; electrochemical method
; electrokinesis
; in situ test
; iron
; iron hydroxide
; phosphorus
; pollutant removal
; reaction kinetics
; wastewater
; wastewater treatment
; adsorption
; alkalinity
; Article
; electrolysis
; kinetics
; oxidation
; oxidation kinetics
; particle size
; pH
; polymerization
; priority journal
; solid
; surface charge
; thermodynamics
; waste water management
; X ray diffraction
; chemistry
; electrochemical analysis
; oxidation reduction reaction
; synthesis
; waste water
; water pollutant
; Adsorption
; Electrochemical Techniques
; Ferric Compounds
; Ferrous Compounds
; Kinetics
; Oxidation-Reduction
; Phosphorus
; Waste Water
; Water Pollutants, Chemical
英文摘要: The application of in situ electrochemical generation of ferrous (Fe(II)) ions for phosphorus (P) removal in wastewater treatment was investigated with attention to the efficacy, kinetics and mechanism. At concentrations typical of municipal wastewater, P could be removed by in situ Fe(II) with removal efficiency higher than achieved on addition of FeSO4 and close to that of FeCl3 under both anoxic and oxic conditions. The generation of alkalinity due to water electrolysis at the cathode created much higher pH conditions compared to FeSO4 dosing thereby resulting in very different pathways of Fe solid phase formation and associated P removal mechanisms. The remarkably similar dependence of P removal on accumulated Fe for all investigated currents, initial P concentrations and DO conditions indicated that kinetic aspects did not play a role in P removal during in situ Fe(II) dosing. Thermodynamic modelling was undertaken to investigate possible solid phase formation pathways under anoxic conditions and these insights were extended to oxic conditions. The exclusive formation of ferrous hydroxide during anoxic in situ Fe(II) dosing implied that P removal occurred via coprecipitation and adsorption. Under oxic conditions, the high pH conditions would have resulted in rapid Fe(II) oxidation and formation of ferric oxyhydroxides with associated coprecipitation and adsorption effecting P removal in a similar pattern to that observed under anoxic conditions. In situ Fe(II) dosing represents a versatile option for chemical P removal with the precise control of Fe dosage to optimize FeP forms for possible P recovery. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112843
Appears in Collections: 气候减缓与适应
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作者单位: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
Recommended Citation:
Zhang J.,Bligh M.W.,Liang P.,et al. Phosphorus removal by in situ generated Fe(II): Efficacy, kinetics and mechanism[J]. Water Research,2018-01-01,136