Al pasar el agua por la membrana, la presión disminuye por el lado de menor concentración. Contemporáneamente aumenta la presión de la solución más concentrada hasta alcanzar el equilibrio que detiene el flujo a través de la membrana.
La diferencia de presión entre las dos soluciones en ese estado de equilibrio se llama “presión osmótica”.
Reverse osmosis is a scientific reversion procedure of the natural osmotic process: all that is needed is the application of a greater pressure than the osmotic pressure to reverse the flow in the semi-permeable diaphragm and therefore to separate the salts and the dissolved solids.
Before this process was possible, a synthetic diaphragm had to be designed, which needed to be highly permeable to water but which also needed to act as an effective barrier against salts and all the other dissolved minerals. |