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Guilherme Mazui

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What is the Difference Between Fluoridation and Defluoridation?

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Fluoridation and defluoridation are two different processes related to the control of fluoride levels in drinking water. Here are the key differences between the two:

  • Fluoridation: This is the process of increasing the fluoride level in drinking water to a level recommended for preventing tooth decay. Fluoridation is successful in reducing tooth decay in children and adults by 40-70%. However, it can lead to dental fluorosis in some cases, which is a condition caused by excessive fluoride intake.
  • Defluoridation: This is the process of decreasing the fluoride content in drinking water. Defluoridation is needed when the naturally occurring fluoride level exceeds recommended limits. It can be accomplished through various methods, such as percolating water through granular beds of activated alumina, bone meal, bone char, or tricalcium phosphate; coagulation with alum; or precipitation with lime.

Both fluoridation and defluoridation are essential processes for quality control of municipal water used as drinking water. The choice between the two processes depends on the specific situation and the desired fluoride levels in the water supply.

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  • What is the Difference Between Fluoridation and Defluoridation?
  • Comparative Table: Fluoridation vs Defluoridation

    • Comparative Table: Fluoridation vs Defluoridation

    The difference between fluoridation and defluoridation lies in their purpose and the fluoride content levels in drinking water:

    Fluoridation Defluoridation
    Increasing the fluoride content in drinking water to reduce tooth decay Decreasing the fluoride content in drinking water when it exceeds recommended limits
    The process is called water fluoridation and only adjusts the fluoride level to maintain appropriate levels for public health When defluoridation is needed, the process aims to remove excess fluoride from the water
    Necessary when the natural fluoride level in water is too low, requiring controlled adjustment using chemical compounds like fluorosilicic acid or sodium fluorosilicate Needed when the naturally occurring fluoride level is too high (above 1.5 mg/L), posing health risks to those consuming it
    Fluoridation does not change the color, smell, or taste of water Defluoridation can be achieved through various methods, such as passing water through granular beds of activated alumina, bone meal, bone char, or tricalcium phosphate; coagulation with alum; or precipitation with lime

    In summary, fluoridation is the process of increasing the fluoride content in drinking water to prevent tooth decay, while defluoridation is the process of reducing the fluoride content when it exceeds recommended limits for public health.

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    Guilherme Mazui

    Guilherme Mazui is graduated in journalism from the Federal University of Minas Gerais (UFMG) and a master's degree in Communication from the University of São Paulo (USP). In addition, he has experience in advertising writing and has worked as a content editor in several companies.