Difference Between Fluoridation and Defluoridation

Thekey differencebetween fluoridation and defluoridation is thatfluoridation is the process of increasing thefluoridecontent, whereas defluoridation is the process of decreasing the fluoride content in drinking water.

Both fluoridation and defluoridation are very important processes regarding the quality control of municipal water we use as drinking water. Defluoridation is the opposite process of fluoridation, and both these processes can be helpful in different situations. Thus, it is important to know the exact difference between fluoridation and defluoridation.

内容

1.Overview and Key Difference
2.什么是氟化
3.What is Defluoridation
4.——氟化反应与Defluori并排比较dation in Tabular Form
5.概括

什么是氟化?

Fluoridation is the process of increasing the fluoride level in drinking water. It is the controlled adjustment of the fluoride level to maintain the appropriate fluoride levels in the water. This is very important to prevent tooth decay. The fluoride in water can prevent the formation of tooth cavities. In this process, a chemical compound containing fluoride ions is added to drinking water. However, fluoridation does not change the colour, smell or taste of water

Earlier, people usedsodium fluoridefor this purpose. However, it is an expensive chemical compound. Today, the compound USA uses for this process is fluorosilicic acid, which is inexpensive. Another compound we can use for fluoridation is sodium fluorosilicate.

What is Defluoridation?

Defluoridation is the process of decreasing the fluoride level in drinking water. In groundwater, fluoride ion is very abundant. Further, this ion is present in high amounts in groundwater compared to surface water. It is due to the leaching of minerals. Since excessive fluoride ion content in drinking water can cause different health issues, defluoridation is an important process. The health problems that occur due this high levels of fluoride include dental fluorosis and skeletal fluorosis.

Although there are different techniques for defluoridation, there are a few limitations as well. The major problem is the high cost. Sometimes, these processes may release even contaminants to the water. Besides, the major techniques we can use for defluoridation include adsorption, precipitation, ion exchange, membrane processes, etc. All these processes are very effective in removing fluoride ion, but the disposal of fluoride-containing sludge is problematic.

What is the Difference Between Fluoridation and Defluoridation?

放流是氟化的相反过程。氟化和放流之间的关键区别在于氟化是增加氟化物含量的过程，而放流化是减少饮用水中氟化物含量的过程。当考虑这些过程的技术时，可以通过添加化学化合物，例如氟化钠，氟硅酸和氟硅酸钠和脱氟化来进行氟化，并通过吸附，沉淀，降水，离子交换，膜过程等进行。

以下信息图总结了氟化与放流化之间的差异。

概括– Fluoridation vs Defluoridation

Both fluoridation and defluoridation are very important water-treating processes. Defluoridation is the opposite process of fluoridation. The key difference between fluoridation and defluoridation is that fluoridation is the process of increasing the fluoride content, whereas defluoridation is the process of decreasing the fluoride content in drinking water.

Reference:

1. Nordqvist, Christian. “Fluoride: Risks, Uses, and Side Effects.” Medical News Today, MediLexicon International, 21 Feb. 2018,Available here.
2. “Defluoridation.” Wikipedia, Wikimedia Foundation, 20 Sept. 2019,Available here.
3. “Water Fluoridation.” Wikipedia, Wikimedia Foundation, 19 Sept. 2019,Available here.

Image Courtesy:

1. “Glass-half-full” By jenny downing – glass half-full（CC由2.0）viaCommons Wikimedia
2. “Dental fluorosis (mild)” By Matthew Ferguson 57 – Own work(CC BY-SA 4.0)viaCommons Wikimedia