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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.
Water Res. 2020 Feb 01; 169:115239.WR

Abstract

Electro-oxidation using RuO2-IrO2/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 RuO2-IrO2/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-RuO2-IrO2/Ti, mZVI-graphite, and RuO2-IrO2/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-RuO2-IrO2/Ti anode when influent ammonia and phosphate concentrations is 200 and 100 mg L-1. 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-RuO2-IrO2/Ti electrode can be used for efficient simultaneous removal of ammonia and phosphate.

Authors+Show Affiliations

Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, 430081, PR China; Department of Chemistry, Zhejiang Sci-tech University, Hangzhou, 310018, PR China.Department of Chemistry, Zhejiang Sci-tech University, Hangzhou, 310018, PR China. Electronic address: hanren.xiaoting@gmail.com.Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, 430081, PR China.Engineering, Faculty of Science, University of East Anglia, Norwich, NR4 7TJ, United Kingdom.Department of Chemistry, Zhejiang Sci-tech University, Hangzhou, 310018, PR China.Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31706129

Citation

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, vol. 169, 2020, p. 115239.
Sun D, Hong X, Wu K, 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 Res. 2020;169:115239.
Sun, D., Hong, X., Wu, K., Hui, K. S., Du, Y., & 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, 115239. https://doi.org/10.1016/j.watres.2019.115239
Sun D, 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 Res. 2020 Feb 1;169:115239. PubMed PMID: 31706129.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simultaneous removal of ammonia and phosphate by electro-oxidation and electrocoagulation using RuO2-IrO2/Ti and microscale zero-valent iron composite electrode. AU - Sun,Dongni, AU - Hong,Xiaoting, AU - Wu,Keming, AU - Hui,K S, AU - Du,Yingying, AU - Hui,K N, Y1 - 2019/10/31/ PY - 2019/07/16/received PY - 2019/10/21/revised PY - 2019/10/25/accepted PY - 2019/11/11/pubmed PY - 2020/1/1/medline PY - 2019/11/10/entrez KW - Ammonia KW - Electro-oxidation KW - Electrocoagulation KW - Phosphate KW - Zero-valent iron SP - 115239 EP - 115239 JF - Water research JO - Water Res VL - 169 N2 - Electro-oxidation using RuO2-IrO2/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 RuO2-IrO2/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-RuO2-IrO2/Ti, mZVI-graphite, and RuO2-IrO2/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-RuO2-IrO2/Ti anode when influent ammonia and phosphate concentrations is 200 and 100 mg L-1. 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-RuO2-IrO2/Ti electrode can be used for efficient simultaneous removal of ammonia and phosphate. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/31706129/Simultaneous_removal_of_ammonia_and_phosphate_by_electro_oxidation_and_electrocoagulation_using_RuO2_IrO2/Ti_and_microscale_zero_valent_iron_composite_electrode_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(19)31013-9 DB - PRIME DP - Unbound Medicine ER -