The production of ultrapure water by membrane capacitive deionization (MCDI) technology
- 作者：Jae-Hun Lee ; Jae-Hwan Choi ; jhchoi@kongju.ac.kr
- 关键词：Ultrapure water ; Membrane capacitive deionization ; Electrodeionization ; Carbon electrode ; Conductivity
- 刊名：Journal of Membrane Science
- 出版年：2012
- 期刊代码：55_03767388
- 类别：ch
- 出版时间：1 August, 2012
- 卷：409-410
- 期：Complete
- 页码：251-256
- 文件大小：1037 K
摘要
This study investigated the possibility of producing ultrapure water (UPW) via membrane capacitive deionization (MCDI). A MCDI unit cell with carbon electrodes, anion- and cation-exchange membrane was constructed to perform desalination experiments at various influent concentrations and cell potentials. The possibility of UPW production via the MCDI was assessed by measuring the conductivity and the pH of the effluent and the current flowing through the cell. UPW with a resistivity of 2-9 M惟 cm was obtained when cell potential in the range of 0.8-1.5 V was applied while feeding influent with a conductivity of 20 渭S/cm. In addition, monitoring the current flow through the cell and the pH of the effluent revealed that MCDI can be operated stably without electrochemical reactions at the electrodes at cell potentials up to 1.5 V. The results also revealed that the desorption rate of the adsorbed ions is adjustable via a negative desorption potential.