Stuff You Should Know How Reverse Osmosis Will Save the World
Jul 15, 2021
Could tiny membranes save humanity? Discover how reverse osmosis transforms salty seawater into fresh drinking water. The podcast dives into the science behind this fascinating process, revealing its potential to tackle global water scarcity. With a mix of engaging anecdotes, including a nod to the band Whitesnake, it balances technical insights with light-hearted fun. Listeners learn about home applications and sustainability challenges, while gaining tips to enhance their water quality. It's an entertaining yet educational journey into the world of water purification!
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Osmosis Explained
- Osmosis is a natural process where water moves through a semi-permeable membrane to equalize solute concentrations.
- This creates osmotic pressure, driving water from a lower concentration to a higher one, seeking equilibrium.
Reverse Osmosis
- Reverse osmosis, unlike osmosis, is energy-intensive and goes against nature's tendency towards equilibrium, forcing water against natural osmotic pressure.
- It produces ultra-pure water by pushing a concentrated solution (like saltwater) through a membrane, leaving behind a higher concentrated solution.
Reverse Osmosis Pioneers
- UCLA grad students Sidney Loeb and Srinivasa Suri Rajan developed the first practical reverse osmosis membrane using cellulose acetate.
- Their 1965 Coalinga, California plant proved the concept, paving the way for large-scale desalination.