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Simultaneous removal of arsenite and fluoride via an integrated electro-oxidation and electrocoagulation process
Zhao, Xu; Zhang, Baofeng; Liu, Huijuan; Qu, Jiuhui
2011-04-01
Source PublicationCHEMOSPHERE
Volume83Issue:5Pages:726—729
AbstractAn integrated electro-oxidation and electrocoagulation system was designed and used to remove As(III) and F(-) ions from water simultaneously. Dimensionally stable anodes (DSA), Fe electrodes, and Al electrodes were combined into an electrochemical system. Two pieces of DSA electrodes were assigned as the outside of the Fe and Al electrodes and were directly connected to the power supply as anode and cathode, respectively. The Fe and Al ions were generated by electro-induced process simultaneously. Subsequently, hydroxides of Fe and Al were formed. Arsenic ions are mainly removed by iron hydroxides and F(-) ions are mainly removed by the Al oxides. At the initial concentration of 1.0 mg L(-1), most of As(III) was transferred into As(V) within 40 min at current density of 4 mA cm(-2), whereas F(-) ions can be efficiently removed simultaneously. The effect of the ratio of Fe and Al plate electrodes and current density on the removal of As(III) and F(-) was investigated. With one piece of Fe plate electrode and three pieces of Al plate electrodes, it is observed that As(III) with concentration of 1 mg L(-1) and F(-) with concentration of 4.5 mg L(-1) can be removed and their final concentrations were below the values of 10 mu g L(-1) and 1.0 mg L(-1), respectively within 40 min. Removal efficiency of As(III) increases with the increase of solution pH. However, in the pH range of 6-7, removal efficiency of F(-) is the largest. (C) 2011 Elsevier Ltd. All rights reserved.
Department环境水质学国家重点实验室
WOS IDWOS:000290009700014
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Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/7088
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Zhao, Xu,Zhang, Baofeng,Liu, Huijuan,et al. Simultaneous removal of arsenite and fluoride via an integrated electro-oxidation and electrocoagulation process[J]. CHEMOSPHERE,2011,83(5):726—729.
APA Zhao, Xu,Zhang, Baofeng,Liu, Huijuan,&Qu, Jiuhui.(2011).Simultaneous removal of arsenite and fluoride via an integrated electro-oxidation and electrocoagulation process.CHEMOSPHERE,83(5),726—729.
MLA Zhao, Xu,et al."Simultaneous removal of arsenite and fluoride via an integrated electro-oxidation and electrocoagulation process".CHEMOSPHERE 83.5(2011):726—729.
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