Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes

doi:10.1016/j.desal.2021.115172

	Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes
	Xu, Yang 3,4; Duan, Feng 3; Li, Yuping 3; Cao, Hongbin 3; Chang, Junjun 3,4; Pang, Haoliang 1; Chen, Jianxin 2
刊名	DESALINATION
	2021-10-15
卷号	514 页码:8
关键词	Flow electrode Capacitive deionization Nickel hexacyanoferrate Capacitance contribution Charge neutralization contribution
ISSN号	0011-9164
DOI	10.1016/j.desal.2021.115172
英文摘要	Flow electrode capacitive deionization (FCDI) has attracted growing attention for the treatment of highconcentration saline water and continuous operation, but the mechanism responsible for the separation of ions has so far received minimal attention. In this study, an asymmetric FCDI (AFCDI) was assembled with nickel hexacyanoferrate (NiHCF) as cathode and activated carbon (AC) as anode. Its desalination performance and distribution of the removed ions were investigated and compared with FCDI using AC as both cathode and anode. Results showed better desalination performance for AFCDI than FCDI at high applied voltages of 2.4 and 2.8 V. The removed ions were adsorbed by active materials (capacitance contribution) and existed in the electrode electrolyte (charge neutralization contribution). However, the contribution of capacitance and charge neutralization was significantly different between NiHCF electrode and AC electrode. When NiHCF was used as electrode, capacitance contribution dominated the removal of sodium and more than 80% sodium was adsorbed by NiHCF at applied voltages of 1.2 & ndash;2.8 V. On the contrary, the removed ions mainly existed in electrode solution when AC was used as electrode and charge neutralization contributed to about 80% of removed ions at 2.8 V. These results clarify the mechanism of ions removal in FCDI.
资助项目	National Natural Science Foundation of China (NSFC)[21976180] ; National Natural Science Foundation of China (NSFC)[U20A20140]
WOS关键词	SUSPENSION ELECTRODES ; WATER DESALINATION ; FARADAIC REACTIONS ; STORAGE ELECTRODE ; CATHODE MATERIAL ; MODE ; LIFE
WOS研究方向	Engineering ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000665803700006
资助机构	National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49264]
专题	中国科学院过程工程研究所
通讯作者	Li, Yuping; Cao, Hongbin
作者单位	1.Xiangtan Univ, Coll Environm & Resources, Xiangtan 411105, Hunan, Peoples R China 2.Hebei Univ Technol, Sch Chem Engn & Technol, Tianjin 300130, Peoples R China 3.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, CAS Key Lab Green Proc & Engn, Inst Proc Engn,Innovat Acad Green Manufacture, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yang,Duan, Feng,Li, Yuping,et al. Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes[J]. DESALINATION,2021,514:8.
APA	Xu, Yang.,Duan, Feng.,Li, Yuping.,Cao, Hongbin.,Chang, Junjun.,...&Chen, Jianxin.(2021).Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes.DESALINATION,514,8.
MLA	Xu, Yang,et al."Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes".DESALINATION 514(2021):8.