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Simultaneous removal of ammonia and phosphate by electro-oxidation and electrocoagulation using RuO2–IrO2/Ti and microscale zero-valent iron composite electrode
Sun,Dongni1,2; Hong,Xiaoting2; Wu,Keming1; Hui,K. S.3; Du,Yingying2; Hui,K. N.4
2020-02-01
Source PublicationWater Research
ISSN0043-1354
Volume169
AbstractElectro-oxidation using RuO–IrO/Ti plate anode and electrocoagulation using iron plate anode were widely applied to remove ammonia and phosphate in an aquatic environment, respectively. In this work, we designed magnetically bound ZVI microparticles on RuO–IrO/Ti plate as a composite electrode for the simultaneous removal of ammonia and phosphate from aqueous solution via combined EO and EC (EO/EC) processes. We present a series of experiments to study such simultaneous removal under an electric field via the EO/EC process. In the electrochemical unit, mZVI-RuO-IrO/Ti, mZVI-graphite, and RuO–IrO/Ti electrodes were used as anodes. The influence of applied voltage, initial pH, zero-valent iron dosage, reaction temperature, and organic compounds on the EO/EC process was also examined. Ammonia and phosphate could be completely removed at an applied voltage of 10 V, pH of 7, zero-valent iron dosage of 0.1 g, and reaction temperature of 35 °C using mZVI-RuO-IrO/Ti anode when influent ammonia and phosphate concentrations is 200 and 100 mg L. Ammonia degradation was consistent with pseudo-zero-order kinetic model. The characterization was analyzed by scanning electron microscope-energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Hence, the mZVI-RuO-IrO/Ti electrode can be used for efficient simultaneous removal of ammonia and phosphate.
KeywordAmmonia Electro-oxidation Electrocoagulation Phosphate Zero-valent iron
DOI10.1016/j.watres.2019.115239
URLView the original
Language英语
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Cited Times [WOS]:15   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorHong,Xiaoting
Affiliation1.Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan,430081,China
2.Department of Chemistry,Zhejiang Sci-tech University,Hangzhou,310018,China
3.Engineering,Faculty of Science,University of East Anglia,Norwich,NR4 7TJ,United Kingdom
4.Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Macau,Taipa,China
Recommended Citation
GB/T 7714
Sun,Dongni,Hong,Xiaoting,Wu,Keming,et al. Simultaneous removal of ammonia and phosphate by electro-oxidation and electrocoagulation using RuO2–IrO2/Ti and microscale zero-valent iron composite electrode[J]. Water Research,2020,169.
APA Sun,Dongni,Hong,Xiaoting,Wu,Keming,Hui,K. S.,Du,Yingying,&Hui,K. N..(2020).Simultaneous removal of ammonia and phosphate by electro-oxidation and electrocoagulation using RuO2–IrO2/Ti and microscale zero-valent iron composite electrode.Water Research,169.
MLA Sun,Dongni,et al."Simultaneous removal of ammonia and phosphate by electro-oxidation and electrocoagulation using RuO2–IrO2/Ti and microscale zero-valent iron composite electrode".Water Research 169(2020).
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