globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2018.01.003
Scopus ID: 2-s2.0-85040253766
Title:
Electricity production and phosphorous recovery as struvite from synthetic wastewater using magnesium-air fuel cell electrocoagulation
Author: Kim J.H.; An B.M.; Lim D.H.; Park J.Y.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2018
Volume: 132
pages begin: 200
pages end: 210
Language: 英语
Keyword: Electricity production ; Mg-air fuel cell electrocoagulation ; Phosphorous recovery ; Struvite ; Wastewater treatment
Scopus Keyword: Coagulation ; Electric power generation ; Electrolytes ; Electrooxidation ; Fuel cells ; Molecular biology ; Recovery ; Sodium chloride ; Wastewater treatment ; Electricity production ; Electro coagulations ; Electrolyte mixtures ; Initial concentration ; Maximum power density ; Phosphorous recovery ; Struvites ; Synthetic waste water ; Magnesium compounds ; chloride ; magnesium ; phosphate ; phosphorus ; struvite ; magnesium ; phosphorus ; potassium derivative ; potassium dihydrogen phosphate ; sodium chloride ; struvite ; coagulation ; concentration (composition) ; dissolution ; dose-response relationship ; electricity generation ; electrolyte ; experimental study ; fuel cell ; magnesium ; oxidation ; phosphorus ; pollutant removal ; reaction rate ; struvite ; wastewater treatment ; Article ; concentration (parameters) ; current density ; dissolution ; electricity ; electrocoagulation ; priority journal ; waste water ; chemistry ; electricity ; electrochemical analysis ; isolation and purification ; procedures ; sewage ; waste water ; Electricity ; Electrochemical Techniques ; Magnesium ; Phosphates ; Phosphorus ; Potassium Compounds ; Sodium Chloride ; Struvite ; Waste Disposal, Fluid ; Waste Water
English Abstract: This research was based on the investigation of a major principle, regarding the effects of NaCl and KH2PO4 concentrations on struvite recovery, with electricity production using magnesium-air fuel cell electrocoagulation, in accordance with the concentration of phosphorous and chloride. The weight ratio of N:P in the synthetic wastewater was in the range of 1.2–21. The concentration of NH4Cl was fixed at 0.277 M (approximately 3888 ppm as NH3-N and 5000 ppm as NH4), while PO4-P was in the range of 0.006–0.1 M. In addition, the concentrations of NaCl as electrolyte were 0, 0.01, and 0.1 M. Phosphate removal increased linearly with the Mg:P ratio, up to approximately 1.1 mol mol−1, irrespective of the initial concentrations of phosphate and NaCl. The one-to-one reaction as mole ratio between phosphate and the dissolved Mg ions resulted in phosphate removal, with the production of a one-to-one magnesium/phosphate mineral, such as struvite. The average removal rate of phosphorous in experiments without a dose of NaCl was 4.19 mg P cm−2 h−1, which was lower than the relative values of 5.35 and 4.77 mg P cm−2 h−1, in experiments with 0.01 and 0.1 M NaCl. The dissolution rate of Mg with electro-oxidation determined the rate of phosphorous removal with struvite recovery. The average removal rates of phosphorous with dose concentrations of 0.006, 0.01 and 0.02 M KH2PO4 were 4.02, 5.54, 6.9 mg P cm−2 h−1, respectively, which increased with the increase in KH2PO4 dose. However, in experiments with a dose of 0.05 and 0.1 M KH2PO4 the average removal rates of phosphorous decreased to 4.84 and 2.51, respectively. The maximum power densities in the electrolyte mixture of 0.05 M KH2PO4/0.277 M NH4Cl, 0.01 M NaCl/0.05 M KH2PO4/0.277 M NH4Cl, and 0.1 NaCl/0.05 KH2PO4/0.277 M NH4Cl were 25.1, 26.4, and 33.2 W/m2, respectively. The increase in the NaCl dose concentration resulted in an increase in the maximum power density and current density. A dose above 0.05 M KH2PO4 resulted in the decrease of the maximum power densities. However, when the dose was below 0.05 M KH2PO4, the maximum power density increased with the increase in KH2PO4 dose. © 2018
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被引频次[WOS]:16   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/112979
Appears in Collections:气候减缓与适应

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Affiliation: Department of Civil and Environmental Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul, 133-791, South Korea

Recommended Citation:
Kim J.H.,An B.M.,Lim D.H.,et al. Electricity production and phosphorous recovery as struvite from synthetic wastewater using magnesium-air fuel cell electrocoagulation[J]. Water Research,2018-01-01,132
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