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Defluorinating ionic sieve of drinking water and production thereof

A technology of ion sieve and drinking water, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of human poisoning, fluorosis, etc., and achieve good results

Inactive Publication Date: 2005-12-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As an important trace element, fluorine has a beneficial or harmful effect on the body depending on the amount of intake. In rural areas that mainly rely on groundwater as drinking water, the fluorine content in drinking water exceeds the standard, leading to endemic fluorosis. For this reason, In the World Health Organization's 1993 report, the fluorine content in drinking water has been strictly regulated, pointing out that when the fluorine content in drinking water is 0.5-1.0mg / L, it is necessary for the human body and can prevent tooth and bone diseases. When the content is greater than 1.5mg / L, it will have a toxic effect on the human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] TiCl 4 Soluble in 3mol / L HCl solution, and then dilute to obtain a Ti concentration of 0.86mol / L; a titanium pillaring agent with a HCl concentration of 0.7mol / L, and columnize titanium according to the ratio of Ti / montmorillonite=20meq / g The agent is slowly added dropwise to the 2% montmorillonite suspension prepared under continuous stirring, and the average particle size of the montmorillonite is 5-50 microns. After stirring, let it stand for 12 hours, then separate the solid and liquid, wash with distilled water several times until there is no Cl ion, and dry at 100°C. Finally, it was calcined at 600°C-650°C for 5 hours, and the titanium pillared montmorillonite was obtained by grinding. The titanium pillared montmorillonite was soaked in 0.1mol / L copper ammonium sulfate solution at a concentration of 4% (wt), respectively. After standing for 12 hours, filter and dry at 100°C. The research results show that the defluoridation ion sieve has a good adsorption effect...

Embodiment 2

[0017] TiCl 4 Soluble in 3mol / L HCl solution, and then dilute to obtain a Ti concentration of 0.86mol / L; a titanium pillaring agent with a HCl concentration of 0.7mol / L, and columnize titanium according to the ratio of Ti / montmorillonite=20meq / g The agent is slowly added dropwise to the 2% (wt) montmorillonite suspension prepared under constant stirring, and the average particle size of the montmorillonite is 5-50 microns. After stirring for 3 hours, put the suspension into a high-pressure container and seal it, and let it stand for 12 hours at a temperature of 300 ° C. After the suspension is taken out, it is separated from the solid and liquid, and at the same time, it is washed several times with distilled water until there is no Cl ion. Dry at ℃. Finally, it was calcined at 600°C-650°C for 5 hours, and the titanium pillared montmorillonite was obtained by grinding. The titanium pillared montmorillonite was soaked in a 0.1mol / L silver nitrate solution at a concentration of...

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Abstract

An ionic sieve for defluorinating the drinking water is compased of the powder of montmorillonite column compound as carrier and one or more of Cu, Ag, Ce and Gd as active component. Its preparing process includes such steps as preparing Ti columning agent, mixing with montmorillonite, calcining, immersing in the solution of said metals, and heating.

Description

technical field [0001] The invention relates to a defluorination ion sieve for drinking water and a preparation method thereof, which belongs to the purification technology of impurities in drinking water. Background technique [0002] As an important trace element, fluorine has a beneficial or harmful effect on the body depending on the amount of intake. In rural areas that mainly rely on groundwater as drinking water, the fluorine content in drinking water exceeds the standard, leading to endemic fluorosis. For this reason, In the World Health Organization's 1993 report, the fluorine content in drinking water has been strictly regulated, pointing out that when the fluorine content in drinking water is 0.5-1.0mg / L, it is necessary for the human body and can prevent tooth and bone diseases. When the content is greater than 1.5mg / L, it will have a toxic effect on the human body. Especially in recent years, due to the development of modern industry an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12
Inventor 那平刘剑锋张海燕王郁凝胡涛孙岩王榕树
Owner TIANJIN UNIV
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