2018-09-13

[public] 71.0K views, 1.82K likes, dislikes audio only

CrashCourse

It can be really important to separate out chemicals for all kinds of reasons. Today we’re going over three different processes engineers use to achieve that separation: distillation, which separates substances based on their different boiling points; liquid-liquid extraction, which uses differences in solubility to transfer a contaminant into a solvent; and reverse osmosis, which filters molecules from a solvent by pressurizing it through a semipermeable barrier.

Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

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RESOURCES:

https://www.nytimes.com/2003/07/29/science/q-a-salt-water-and-fresh.html

https://www.grida.no/resources/5808

https://academic.oup.com/bioscience/article/67/12/1026/4605229

https://pubchem.ncbi.nlm.nih.gov/compound/ethanol

https://www.britannica.com/science/distillation

http://www.srsengineering.com/our-products/distillation-columns/how-columns-work/

http://www.wermac.org/equipment/distillation_part2.html

https://www.aiche.org/resources/publications/cep/2015/november/design-principles-liquid-liquid-extraction

https://puretecwater.com/reverse-osmosis/what-is-reverse-osmosis#understanding-reverse-osmosis

https://www.veoliawatertechnologies.co.uk/technologies/reverse-osmosis

http://www.toraywater.com/knowledge/kno_001_01.html

https://www.pureaqua.com/reverse-osmosis-water-treatment-in-saudi-arabia/

https://www.sciencelearn.org.nz/resources/2051-separating-out-foods-into-component-molecules

https://www.explainthatstuff.com/chromatography.html

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