RO Water Purifier principle:
The pore diameter of the reverse osmosis membrane is mostly 1 nanometer (1nm=10^-9m), and its separation objects are dissolved ions and organic matter with a molecular weight of several hundred or more.
A membrane that can only pass through solvent but not solute is generally called an ideal semipermeable membrane.
When a solvent and a solution (or two solutions of different concentrations) are placed on both sides of the membrane, the pure solvent will naturally pass through the semipermeable membrane and spontaneously move to the solution (or move from a low-concentration solution to a high-concentration solution) on both sides. flow, a phenomenon called osmosis.
Equilibrium is reached when the osmotic process proceeds to the point where pressure develops at the liquid surface of the solution to counteract the tendency of the solvent to flow toward the solution. This pressure is called the osmotic pressure of the solution.
The size of the osmotic pres…