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Method for removing fluorions from mineral water by using food grade alkaline magnesium carbonate

A mineral water and food-grade technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as poor taste, affecting the quality of mineral water, element loss, etc.

Inactive Publication Date: 2011-07-20
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the Chinese patent application "Preparation method of a magnesium defluoridation agent for drinking water" (application number 200910074805.X), a magnesium defluorination agent is disclosed, which has an obvious defluoridation effect when used in drinking water, but the document The change of pH value and the loss of beneficial elements in the water treated with this defluoridation agent are not provided; from the analysis of its preparation process conditions and product inspection report, the active ingredient of this defluoridation agent is magnesium oxide (MgO)
However, our experiments show that the water treated with magnesium oxide is obviously weakly alkaline, with pH ≈ 10, and the taste is poor. If it is used for defluoridation of mineral water, it will also lead to B, Si, Sr, etc. in mineral water. Severe loss of beneficial elements, thus affecting the quality of mineral water

Method used

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  • Method for removing fluorions from mineral water by using food grade alkaline magnesium carbonate
  • Method for removing fluorions from mineral water by using food grade alkaline magnesium carbonate
  • Method for removing fluorions from mineral water by using food grade alkaline magnesium carbonate

Examples

Experimental program
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Effect test

Embodiment 1

[0009] Take 1 liter of mineral water to be treated, keep the water temperature at 20°C, add 16 grams of food-grade basic magnesium carbonate powder under constant stirring, continue stirring for 2 hours, let stand for 8 hours, filter to remove insolubles in the water, and obtain pH=7.5 , and the fluoride ion (F - ) concentration is less than 1.5mg / L mineral water, the main element content in the mineral water before and after treatment is shown in Table 1.

[0010] Table 1

[0011]

Embodiment 2

[0013] Take 1 liter of mineral water to be treated, keep the water temperature at 30°C, add 8 grams of food-grade basic magnesium carbonate powder under constant stirring, continue stirring for 6 hours, let stand for 16 hours, filter to remove insolubles in the water, and obtain pH = 7.5 , and the fluoride ion (F - ) concentration is less than 1.5mg / L mineral water, the content of main elements in the mineral water before and after treatment is shown in Table 2.

[0014] Table 2

[0015]

Embodiment 3

[0017] Take 1 liter of mineral water to be treated, keep the water temperature at 50°C, add 12 grams of food-grade basic magnesium carbonate powder under constant stirring, continue stirring for 4 hours, let stand for 12 hours, filter to remove insolubles in the water, and obtain pH=7.5 , and the fluoride ion (F - ) concentration is less than 1.5mg / L mineral water, the content of main elements in the mineral water before and after treatment is shown in Table 3.

[0018] table 3

[0019]

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PUM

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Abstract

The invention discloses a method for removing fluorions from mineral water by using food grade alkaline magnesium carbonate. In the method, fluorine is removed from mineral water by taking food grade alkaline magnesium carbonate as a fluorine removing agent. The method comprises the following operating steps of: uniformly mixing food grade alkaline magnesium carbonate powder with mineral water with the fluorine content of higher than the national standard in the mass ratio of 1:(62-1):125 by continuously stirring; keeping the temperature of the mineral water between 20 DEG C and 60 DEG C; continuously stirring for 2-8 hours; standing for 2-24 hours; and removing insoluble substances from water by filtering to obtain drinking mineral water of which the pH is 7.5, the fluorine content is accordant with the national standard, beneficial elements are effectively kept and Mg residual is lower than the value of 150 mg / L suggested by the world health organization (WHO).

Description

technical field [0001] The invention belongs to a method for removing fluorine ions in mineral water by using food-grade basic magnesium carbonate. Background technique [0002] Mineral water contains a variety of trace elements that are beneficial to human health, but also contain some trace elements that are harmful to human health. Fluoride in drinking water is a double-edged sword. When the fluoride ion concentration is between 0.5 and 1.0 mg / L, it can effectively prevent dental caries, but if you drink water with a fluoride ion concentration exceeding 2 mg / L for a long time, you will suffer from fluorosis Dental and skeletal fluorosis and other systemic chronic diseases, and even damage to human cranial nerves. The World Health Organization (WHO) recommends that the fluoride ion content in drinking water should not exceed 1.5mg / L. Water hygiene standards (GB5749-2006) have stricter regulations, and the content of fluoride ions should not exceed 1.0mg / L. However, in m...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F101/14
Inventor 龚琦唐千淄韦小玲伍娟
Owner GUANGXI UNIV
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