DOI: 10.1016/j.watres.2017.12.015
Scopus记录号: 2-s2.0-85038865823
论文题名: A comparison of multicomponent electrosorption in capacitive deionization and membrane capacitive deionization
作者: Hassanvand A. ; Chen G.Q. ; Webley P.A. ; Kentish S.E.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 131 起始页码: 100
结束页码: 109
语种: 英语
英文关键词: Calcium
; Capacitive deionization
; Desalination
; Electrosorption
; Nitrate
; Sulfate
Scopus关键词: Calcium
; Desalination
; Desorption
; Effluents
; Ion exchange
; Ions
; Nitrates
; Sulfur compounds
; Adsorption and desorptions
; Capacitive deionization
; Charge efficiency
; Electrosorption
; Membrane capacitive deionization
; Rate-controlling steps
; Salt concentration
; Sulfate
; Ion exchange membranes
; calcium
; chloride
; ion
; nitrate
; potassium
; sodium
; sodium chloride
; sulfate
; adsorption
; calcium
; desalination
; desorption
; effluent
; electrochemical method
; ion exchange
; membrane
; nitrate
; sulfate
; adsorption
; Article
; capacitive deionization
; comparative study
; controlled study
; desalination
; desorption
; electrosorption
; ion exchange
; ionization
; membrane
; pH
; physical phenomena
; priority journal
英文摘要: In this study, the desalination performance of Capacitive Deionization (CDI) and Membrane Capacitive Deionization (MCDI) was studied for a wide range of salt compositions. The comprehensive data collection for monovalent and divalent ions used in this work enabled us to understand better the competitive electrosorption of these ions both with and without ion-exchange membranes (IEMs). As expected, MCDI showed an enhanced salt adsorption and charge efficiency in comparison with CDI. However, the different electrosorption behavior of the former reveals that ion transport through the IEMs is a significant rate-controlling step in the desalination process. A sharper desorption peak is observed for divalent ions in MCDI, which can be attributed to a portion of these ions being temporarily stored within the IEMs, thus they are the first to leave the cell upon discharge. In addition to salt concentration, we monitored the pH of the effluent stream in CDI and MCDI and discuss the potential causes of these fluctuations. The dramatic pH change over one adsorption and desorption cycle in CDI (pH range of 3.5–10.5) can be problematic in a feed water containing components prone to scaling. The pH change, however, was much more limited in the case of MCDI for all salts. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113027
Appears in Collections: 气候减缓与适应
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作者单位: School of Chemical and Biomedical Engineering, University of Melbourne, Parkville, VIC 3010, Australia; The ARC Dairy Innovation Hub, Department of Chemical Engineering, University of Melbourne, Parkville, VIC 3010, Australia
Recommended Citation:
Hassanvand A.,Chen G.Q.,Webley P.A.,et al. A comparison of multicomponent electrosorption in capacitive deionization and membrane capacitive deionization[J]. Water Research,2018-01-01,131