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2. Defluoridation - Wikipedia

   en.wikipedia.org/wiki/Defluoridation

   Defluoridation is the downward adjustment of the level of fluoride in drinking water. Worldwide, fluoride is one of the most abundant anions present in groundwater. Fluoride is more present in groundwater than surface water mainly due to the leaching of minerals. Groundwater accounts for 98 percent of the earth's potable water. [1]

3. Experts battle culture warriors over a 'revolutionary' public ...

   www.aol.com/news/medical-freedom-vs-public...

   Experts eventually discovered that the water in Colorado Springs had unusually high levels of fluoride — up to 12 milligrams per liter. Fluoride is a mineral found naturally in rocks, which then ...

4. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out for a variety of ...

5. Water fluoridation - Wikipedia

   en.wikipedia.org/wiki/Water_fluoridation

   Fluoridation does not affect the appearance, taste, or smell of drinking water.[1] It is normally accomplished by adding one of three compounds to the water: sodium fluoride, fluorosilicic acid, or sodium fluorosilicate. Sodium fluoride(NaF) was the first compound used and is the reference standard.[35]

6. Water fluoridation controversy - Wikipedia

   en.wikipedia.org/wiki/Water_fluoridation_controversy

   e. The water fluoridation controversy arises from political, ethical, economic, and health considerations regarding the fluoridation of public water supplies . For deprived groups in both maturing and matured countries, international and national agencies and dental associations across the world support the safety and effectiveness of water ...

7. Activated alumina - Wikipedia

   en.wikipedia.org/wiki/Activated_alumina

   Activated alumina. Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 m 2 /g. The compound is used as a desiccant (to keep things dry by adsorbing water from the air) and as a filter of fluoride, arsenic ...