Iim Fatimah, Endarko : Measurements Of The Salt-removal Of NaCl, KCl And MgCl Using a Carbon Electrode Prepared With Freezing Thawing Method In Capacitive Deionization
International Conference on Advanced Materials Science and Technology (ICAMST)
carbon electrode CDI salt-removal freezing thawing
Carbon electrodes prepared with freezing thawing method for desalination purpose has been synthesized and characterized. The carbon electrodes were prepared with an activated carbon (700 – 1400 m2/g) and polyvinyl alcohol (PVA) as a binder using freezing thawing method with 3 and 4 cycles (1 cycle is 12 hours for freezing and 12 hours for thawing). Electrical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to analyze their electrochemical properties. The main study was to measure the salt-removal of 180 ?S/cm NaCl, MgCl and KCl using a capacitive deionization (CDI) unit cell with five pairs of carbon electrodes. The applied potential of 2.0 V and a flow rate of 25 mL/min were used to desalination tests, the result showed that the salt-removal percentage of KCl solution has greater than NaCl and MgCl. The highest value for the salt-removal of NaCl, KCl and MgCl can be achieved for the freezing thawing method with 4 cycles. The salt-removal percentage of KCl was achieved at 64.10 whilst resulted in 54.30 and 54.47 for NaCl and MgCl, respectively.