The influences of separators on capacitive deionization systems in the cycle of adsorption and desorption
| Autor: | Zhou Shi, Zhengyang Gu, Ruihuan Ning, Qihan Yao, Qingqing Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Capacitive deionization Stainless steel fiber Health Toxicology and Mutagenesis Analytical chemistry Separator (oil production) 02 engineering and technology Sodium Chloride 010501 environmental sciences engineering.material Electric Capacitance Electrochemistry 01 natural sciences Desalination Water Purification Adsorption Electricity Desorption Environmental Chemistry Electrodes 0105 earth and related environmental sciences Ions Electrochemical Techniques General Medicine 021001 nanoscience & nanotechnology Pollution Electrode engineering 0210 nano-technology |
| Zdroj: | Environmental Science and Pollution Research. 25:3313-3319 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-017-0716-5 |
| Popis: | This research focused on the influence of different separator compartments on the performance of capacitive deionization (CDI) cells in terms of brackish water treatment. For comparison, different separators including filter paper(FP), carbon nanotube (CNT), and stainless steel fiber (SSF) on deionization and desorption rate of salt were examined. The best performance was obtained when the CNT separator was packed, followed by SSF and FP. Reducing the cell voltage from 1.2 to 0.4 V decreased the salt removal and electrode regeneration rate of SSF-CDI. Electrochemical impedance spectrometry (EIS) analysis revealed that the resistance and specific capacitance of separator materials are essential to the desalination and desorption performance of CDI. The electric double layers (EDLs) accelerated the ion transfer in the flow chamber due to storing excess ions, therefore increasing the desalination and electrode regeneration rate. |
| Databáze: | OpenAIRE |
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