Electrodialysis (EDI) is a technology that uses electric field force to drive the movement of charged particles (ions) in a solution through ion exchange membranes to achieve the purpose of separating, desalinating, and concentrating specific ions in the solution. It is widely used in fields such as water treatment, chemical industry, food processing, and environmental protection.
Working principle:
The electrodialysis system usually consists of the following parts:
Ion exchange membrane: Electrodialysis uses selectively permeable ion exchange membranes, usually including cation exchange membranes (allowing cations to pass through) and anion exchange membranes (allowing anions to pass through). These membranes are arranged alternately in an electrodialysis stack.
Electrodes: Electrodes, namely anode and cathode, are set at both ends of the electrodialysis stack. A direct current voltage is applied to the electrodes to form an electric field.
Compartment: The ion exchange membrane divides the electrodialyzer into multiple compartments. Each compartment is separated by a membrane to form a concentrated compartment and a dilute compartment.
When a direct current voltage is applied to the electrodes, the cations (positive ions) in the solution will move towards the cathode, while the anions (negative ions) will move towards the anode. Due to the selective permeability of the ion exchange membrane, ions can only move along specific paths:
Cations can only pass through cation exchange membranes and move from the concentrated compartment to the dilute compartment.
Anions can only pass through anion exchange membranes and move from the concentrated compartment to the dilute compartment.
In this way, the ion concentration in the concentrated compartment gradually decreases, while the ion concentration in the dilute compartment gradually increases, realizing the desalination or concentration of the solution.
Titanium anode for electrodialysis is an important part of electrodialysis technology.
The titanium anode plate for electrodialysis has excellent corrosion resistance and good electrical conductivity, and is very suitable for use in an environment involving electrolyte solutions such as electrodialysis. In the electrodialysis process, the titanium anode plate for electrodialysis, as part of the electrode, provides an electric field for the migration of ions.
Since electrodialysis is usually used in fields such as water treatment, chemical industry, food processing and environmental protection, the solutions in these fields may be highly corrosive, while the titanium anode plate can maintain stable performance under harsh conditions.
The quality and performance of the titanium anode plate for electrodialysis play a key role in the efficiency and reliability of the electrodialysis system. High-quality titanium anode plates should have a uniform coating, good electrical conductivity and a long service life to ensure the stable operation of the electrodialysis process and the efficient separation, desalination or concentration of specific ions in the solution.
With the continuous progress of technology, our research and development of titanium anode plates for electrodialysis is also deepening continuously to meet the needs of different application scenarios and improve the overall performance and application range of electrodialysis technology.
