Reverse osmosis (RO) is water purification process that uses a partially permeable membrane to separate ions, unwanted molecules and larger particles from drinking water. In reverse osmosis an applied pressure is used to overcome osmotic pressure, a colligative property that is driven by chemical potential differences of solvent, a thermodynamics parameter. RO can remove many type of suspended chemical materials as well biological one from water. 

Reverse osmosis (RO) is water purification process that uses a partially permeable membrane to separate ions, unwanted molecules and larger particles from drinking water. In reverse osmosis an applied pressure is used to overcome osmotic pressure, a colligative property that is driven by chemical potential differences of solvent, a thermodynamics parameter. RO can remove many type of suspended chemical materials as well biological one from water.