Basic concepts and classification of reverse osmosis membranes

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Basic concepts and classification of reverse osmosis membranes Reverse osmosis membranes are artificially prepared membranes that can selectively filter water molecules. Depending on the material of manufacture, reverse osmosis membranes are made of polymer materials, usually polyamide. 2. Permeability mechanism and influencing factors of reverse osmosis membrane The permeability mechanism of reverse osmosis membrane is mainly based on the physical properties of semi-permeable membrane, that is, only water molecules can pass through, while other solutes are retained. Under pressurized conditions, water molecules diffuse from the high concentration side to the low concentration side, thereby achieving water purification and separation. The permeability performance of reverse osmosis membrane is affected by many factors such as pressure, temperature, pH value, pollutants, etc. 3. Advantages and limitations of reverse osmosis membranes in different application scenarios. Reverse osmosis membranes have the advantages of high purity, low energy consumption, and environmental protection. Therefore, they are widely used in drinking water treatment, industrial water treatment, seawater desalination and other fields.