Dr. J. William Hirzy, EPA scientist, is reported to have said, "If the stuff gets out into the air, it's a pollutant; if it gets into the river, it's a pollutant, if it gets into a lake, it's a pollutant; but if it goes right straight into your drinking water system, it's not a pollutant. That's amazing!"
from http://www.organic-gardening-and-homesteading.com/fluoride-water-filters.html
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.[31] It is a white, odorless powder or crystal; the crystalline form is preferred if manual handling is used, as it minimizes dust.[32] It is more expensive than the other compounds, but is easily handled and is usually used by smaller utility companies.[33]
- Fluorosilicic acid (H2SiF6) is an inexpensive liquid by-product of phosphate fertilizer manufacture.[31] It comes in varying strengths, typically 23–25%; because it contains so much water, shipping can be expensive.[32] It is also known as hexafluorosilicic, hexafluosilicic, hydrofluosilicic, and silicofluoric acid.[31]
- Sodium fluorosilicate (Na2SiF6) is the sodium salt of fluorosilicic acid. It is a powder or very fine crystal that is easier to ship than fluorosilicic acid. It is also known as sodium silicofluoride.[32]
No comments:
Post a Comment