New horizons in purification of liquids: novel colloidal and 1nterfacial strategies to remove hazardous molecules, viruses and other microorganisms from water or blood

摘要

Water is continually moving around, through, and above the earth as water vapor, liquid water, and ice. In fact, water is continually changing its form. The Earth is essentially a "closed system", like a terrarium. That means that the Earth neither, as a whole, gains nor loses much matter, including water. This means that the same water that existed on Earth millions of year ago is still here. Thanks to the water cycle, the same water is continually being recycled all around the globe. It is entirely possible that the water you drank for lunch was once used by some other person for bathing.