活性炭粉末电极电容除盐与膜电容除盐对比

A comparative study on capacitive deionization and membrane capacitive deionization with powdered activate carbon as electrodes

为研究电容法除盐技术(CDI)与膜电容法除盐技术(MCDI)除盐效果的差异,获得具有较优除盐特性的电除盐体系,选用成本较低的活性碳粉末作为电容法除盐体系的电极材料,研究CDI与MCDI对不同质量浓度盐水的处理效果.结果表明,随着处理盐溶液质量浓度的提高,CDI与MCDI的电吸附量均有提高,且MCDI电吸附效果的优势更为明显.当盐水质量浓度由0.05 g/L上升到0.5 g/L时,MCDI的电吸附量由99.4μmol/g升至694.4μmol/g,而CDI的电吸附量仅由80.3μmol/g变化至135.7μmol/g.

To get an effective electric desalination system, the electrosorption performance of a capactive deionization （CDI） and a membrane capactive deionization （MCDI） was compared. The electrosorption capacity and electrosorption rate of CDI and MCDI with different salt concentrations were studied when powdered activated carbon was used as the electrode material. The results showed that as the salt concentration increased from 0. 05 to 0. 5 g/L, the electrosorption capacity of MCDI increased dramatically from 99. 4 to 694. 4 mol/g, while the electrosorption capacity of CDI just increased from 80. 3 to 135.7 μmol/g.