Dialysis
Dialysis (D) is the process by which a solute passes from the upstream of the membrane to the downstream of the membrane under its own concentration gradient.
Dialysis is the earliest discovered and studied membrane separation technology, but because of its own system limitation, the dialysis process is slow, the efficiency is low, and the selectivity of the dialysis process is not high. Therefore, the dialysis process is mainly used to remove the low molecular weight components of a variety of solute solutions, such as blood dialysis, replace the kidney with a dialysis membrane to remove toxic low molecular weight components such as urea, creatinine, phosphates and uric acid to alleviate the condition of patients with renal failure and uremia.
Under the role of DC electric field, taking the potential difference as impetus, electrodialysis (ED for short) utilizes ion exchange membrane to select the cation and anion in the solution, separates the electrolyte from solution, and so that to realize the concentration, desalination, and purification of solutions.
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