چكيده به لاتين
In recent years, capacitive deionization has been considered as one of the effective methods in desalination of freshwater. In this study, an attempt has been made to improve the performance of this method by examining the performance of this method on a laboratory scale and making changes to it, in addition to better understanding this new method. In the first part of the activity in this research, electrodes made of commercial activated carbon were used in the process of capacitive de-ionization in the middle passage with constant current conditions. To measure the amount of salt adsorbed during this experiment, 10 mM sodium chloride solution, input flow rate of 20 ml / min, voltage limit of 0.8 volts and current density of 0.1 A / g were used. The adsorption efficiency of this type of electrode was 4.5 mg / gThe second part involved the synthesis of hexacyanate iron ferrate. In order to improve the electrochemical performance of this material, co-precipitation synthesis method and Na4Fe (CN) 6 raw material were used. Also, in order to study the morphological change of the synthesized material from cube to spherical, high temperature etching method with PVP was used. In the third part of the activity, the performance of a hybrid capacitive ionization cell consisting of an activated carbon electrode and an iron hexacyanoferrate electrode was investigated so that at a voltage of 0.8 V and a current density of 0.1 A / g, the absorption efficiency was 33 mg / g.. The effect of morphological change on the adsorption efficiency on the current density A / g 1 was also investigated. The adsorption efficiency in the first charge cycle for the cell consisting of spherical and cubic hexacyanoferrate was 17 mg / g and 15.4 mg / g, respectively. Then, the electrochemical performance of the electrodes made by cyclic voltammetry and charge-discharge test was investigated.
