It takes a minimum of 5 standard 1 h class periods, but can be expanded or downsized as is appropriate. View Author Information. Cite this: J. Article Views Altmetric -. Cited By. This article has not yet been cited by other publications. Pair your accounts. In this process, pressure is applied to the water, which allows water to flow through a membrane, leaving the ions, salts, and other dissolved solids and nonvolatile organics behind.
My Cart. We are America's leading supplier of high quality drinking water systems and information source. Water and Health. Water Quality. Water Can Heal. Contaminants Facts. Air and Health. Water Filtration or Purification — Key Differences Why do we need to remove chlorine from our whole house? Top 5 Hard Water Problems for Homeowners. See Also. Distillation requires a lot of energy to boil the water, and also to cool the steam down to condense it.
The waste water is very salty and can be difficult to dispose of in a sustainable way which does not harm marine ecosystems. Water is put under high pressure and passed through a membrane which has tiny pores holes in it. The pores allow water molecules through, but prevent most ions and molecules from passing through.
Reverse osmosis requires expensive membranes and also produces a large volume of waste water, so its efficiency is often quite low. Which method of water purification would be best suited to a country in the Middle East which has a large amount of fossil fuel reserves?
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