Semipermeable membrane

With semi-permeability (Latin semi, half, partly ' and Permeo, go through, walk through, pass '; see permeability ) refers to the property of substantial or physical interfaces (often membranes ), " semi- permeable" or to be " partially transparent ".

In the simplest definition is referred to a semi-permeable membrane, if the membrane transmits the solvent but not the solute. More generally, molecules below a certain molecular weight or colloids or particles below a certain size to pass through only.

Semi-permeability is the basis for the process of osmosis that takes place in the cells of all organisms and is also used for technical applications such as the osmotic power plant. In addition, we used semi- permeability of the so-called reverse osmosis, for example, for water treatment and seawater desalination.