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Defluoridation adsorbent material and preparation method thereof

An adsorption material and adsorbent technology, applied in the field of defluorination adsorption material and its preparation, can solve the problems of large influence of pH value, low adsorption capacity of defluorination adsorbent, low regeneration efficiency, etc. Stable adsorption effect and good regeneration effect

Inactive Publication Date: 2012-07-25
曾锐 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems that the existing fluorine removal adsorbents have low adsorption capacity, are greatly affected by the pH value, and have low regeneration efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Grinding the adsorbent zeolite to 40-100 mesh;

[0021] (2) Add CaCl2 and MgCl2 After the solution was stirred, the supernatant was discarded, and the NaOH solution was added to stir;

[0022] (3) Pour off the suspension, rinse the adsorbent with deionized water, and dry to obtain the composite fluorine removal adsorbent.

Embodiment 2

[0024] (1) Adsorbent pretreatment: choose zeolite produced in Fuxin, Liaoning, and crush it to 40-100 mesh. Wash with 5% hydrochloric acid for 2-3 times until aluminum ions are no longer detected.

[0025] (2) Take 5-10g of the above-mentioned pretreated adsorbent, then add 100mL CaCl 2 and MgCl 2 Stir the solution for 20-60min; finally discard the supernatant, add 100-250mL NaOH solution with a concentration of 1%-5%, and stir for 20-60min;

[0026] (3) Pour off the suspension, rinse the remaining granular adsorbent with deionized water for 4-5 times, and obtain the calcium-magnesium composite defluoridation adsorbent material after drying.

Embodiment 3

[0028] A calcium-magnesium composite fluorine removal adsorption material, the preparation method of which is:

[0029] (1) Adsorbent pretreatment: choose zeolite produced in Fuxin, Liaoning, and crush it to 40 mesh. Wash with 5% hydrochloric acid for 2-3 times until aluminum ions are no longer detected.

[0030] (2) Take 10 g of the above-mentioned pretreated adsorbent, then add 90 mL of 1% CaCl 2 solution and 10 mL of 1% MgCl 2 The solution was stirred for 30 min; finally, the supernatant was discarded, and 100 mL of 1% NaOH solution was added, and stirred for 30 min;

[0031] (3) Pour off the suspension, rinse the remaining granular adsorbent with deionized water for 4-5 times, and obtain the calcium-magnesium composite defluoridation adsorbent material after drying.

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Abstract

The invention provides a defluoridation adsorbent material and a preparation method thereof, belonging to the technical field of water treatment. The composite defluoridation adsorbent material comprises oxides containing calcium and magnesium and hydroxides which are obtained via synthesis with zeolite as a skeleton, and is a particulate substance with the particle diameter of 40-100 meshes, and the content of calcium or magnesium is 10-30 percent. The preparation method of the defluoridation adsorbent material comprises the following steps of: (1) pulverizing the adsorbent zeolite to 40-100 meshes; (2) adding CaCl2 and MgCl2 solution, mixing, removing supernatant, adding NaOH solution, and mixing; and (3) removing suspension, washing the adsorbent with deionized water, and drying to obtain the composite defluoridation adsorbent material. The composite adsorbent material has large adsorption capacity, a wide scope of application of the pH, good regeneration effects, stable adsorption effects, wide raw material source and simplicity in preparation.

Description

(1) Technical field [0001] The invention relates to a fluoride removal adsorption material and a preparation method thereof, belonging to the technical field of water treatment. (2) Background technology [0002] Fluorine is an essential trace element for the human body, but insufficient or excessive intake of fluorine from the outside world will have adverse effects on the human body. The suitable range of fluorine for the human body is very narrow. If you lack fluoride, you will easily suffer from dental caries. If you take too much fluoride, it will lead to dental fluorosis and skeletal fluorosis. The main way for the human body to absorb fluorine is drinking water. According to the sanitary standard of drinking water in my country, the fluorine content in drinking water shall not exceed 1.0mg / L. [0003] my country is a country with serious fluoride hazards. By the end of 2000, the population of endemic fluorosis (mainly drinking water type and soot pollution type) in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30
Inventor 曾锐李东红丘鸿斌
Owner 曾锐
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