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Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes
Xu, Yang1,2; Duan, Feng1; Li, Yuping1; Cao, Hongbin1; Chang, Junjun1,2; Pang, Haoliang3; Chen, Jianxin4
2021-10-15
Source PublicationDESALINATION
ISSN0011-9164
Volume514Pages:8
AbstractFlow 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.
KeywordFlow electrode Capacitive deionization Nickel hexacyanoferrate Capacitance contribution Charge neutralization contribution
DOI10.1016/j.desal.2021.115172
Language英语
WOS KeywordSUSPENSION ELECTRODES ; WATER DESALINATION ; FARADAIC REACTIONS ; STORAGE ELECTRODE ; CATHODE MATERIAL ; MODE ; LIFE
Funding ProjectNational Natural Science Foundation of China (NSFC)[21976180] ; National Natural Science Foundation of China (NSFC)[U20A20140]
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Chemical ; Water Resources
Funding OrganizationNational Natural Science Foundation of China (NSFC)
WOS IDWOS:000665803700006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49265
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Yuping; Cao, Hongbin
Affiliation1.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
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Xiangtan Univ, Coll Environm & Resources, Xiangtan 411105, Hunan, Peoples R China
4.Hebei Univ Technol, Sch Chem Engn & Technol, Tianjin 300130, Peoples R China
Recommended Citation
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.
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