Removal of phosphate in secondary effluent from municipal wastewater treatment plant by iron and aluminum electrocoagulation: Efficiency and mechanism

doi:10.1016/j.seppur.2021.120439

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	Removal of phosphate in secondary effluent from municipal wastewater treatment plant by iron and aluminum electrocoagulation: Efficiency and mechanism
	Y., Yang ; Y., Li ; R., Mao ; Y., Shi ; S., Lin ; M., Qiao ; X., Zhao
刊名	Separation and Purification Technology
	2022-04-01
卷号	286
关键词	Aluminum Biochemical oxygen demand Dissolved oxygen Efficiency Effluent treatment Effluents Ion exchange Iron oxides Sewage pumping plants Wastewater treatment Water treatment plants Dissolved oxygen concentrations Domestic wastewater Electro coagulations Floc Low dissolved oxygen Municipal wastewater treatment plant effluent Municipal wastewater treatment plants Phosphate removal Secondary effluent Wastewater treatment plant effluent
ISSN号	1383-5866
DOI	10.1016/j.seppur.2021.120439
英文摘要	Domestic wastewater quality conditions are complex, which will affect the types of flocs in Fe-electrocoagulation (EC). However, the influence of different types of flocs has not been considered for the removal of phosphate in real wastewater. Herein, the removal of phosphate in real domestic wastewater secondary effluent was investigated during Fe-EC process under low and high dissolved oxygen (DO) concentrations. The removal of phosphate was also investigated during Al-EC process for comparison. The results showed that phosphate (1.3 mg/L) could be efficiently removed with an efficiency of 98% ± 2% both during Fe-EC process with low and high DO concentration, as well as during Al-EC process, with a slight lower removal rate during Al-EC (in 5 min) compared with Fe-EC (in 2 min), at 10 mA/cm2. The flocs composition was mainly green rust during Fe-EC with low DO, amorphous trivalent iron oxide/hydroxide during Fe-EC with high DO, and amorphous alum hydroxide during Al-EC. The removal mechanism was also deduced that the removal of phosphate by Fe-EC with high DO and Al-EC was mainly by coagulation, while by Fe-EC with low DO concentration was mainly by ion-exchange adsorption. © 2022 Elsevier B.V.
语种	英语
出版者	Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157860]
专题	兰州理工大学
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; 3.Guizhou Water Conservancy and Hydropower Engineering Consulting Co. LTD., Guiyang; 550002, China; 4.R&D Centre, Guizhou Water Service Co., LTD., Guiyang; 550002, China
推荐引用方式 GB/T 7714	Y., Yang,Y., Li,R., Mao,et al. Removal of phosphate in secondary effluent from municipal wastewater treatment plant by iron and aluminum electrocoagulation: Efficiency and mechanism[J]. Separation and Purification Technology,2022,286.
APA	Y., Yang.,Y., Li.,R., Mao.,Y., Shi.,S., Lin.,...&X., Zhao.(2022).Removal of phosphate in secondary effluent from municipal wastewater treatment plant by iron and aluminum electrocoagulation: Efficiency and mechanism.Separation and Purification Technology,286.
MLA	Y., Yang,et al."Removal of phosphate in secondary effluent from municipal wastewater treatment plant by iron and aluminum electrocoagulation: Efficiency and mechanism".Separation and Purification Technology 286(2022).