When preparing for reverse osmosis, which type of membranes should be utilized?

The use of thin-film composite membranes in reverse osmosis (RO) is due to their superior filtration capabilities and efficiency in removing contaminants from water. These membranes consist of a very thin layer that facilitates high permeability, allowing for better water flux while effectively rejecting a wide range of solutes, including salts and organic molecules.

Thin-film composites are particularly advantageous because they combine the properties of selectivity and durability, making them ideal for applications in both water purification and dialysis. Their structure enhances the performance in terms of pressure and flow rates, which are critical factors in reverse osmosis systems.

While other types of membranes, such as cellulose acetate and polysulfone, have their applications, they may not provide the same level of efficiency and performance characteristic of thin-film composite membranes in reverse osmosis scenarios. The peritoneum is not applicable, as it is not a membrane designed for reverse osmosis purposes in water treatment.