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Modified HAP composite material for removing fluoride in water body as well as preparation method and application of the modified HAP composite material

A composite material and modification technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of high economic benefits, lack of reliable reliability, etc., and achieve easy availability of raw materials, low cost, and preparation methods. Simple and easy effects

Inactive Publication Date: 2020-06-12
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of reliable, reliable, high economic benefits, easy to operate, and suitable for China's defluoridation technology

Method used

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  • Modified HAP composite material for removing fluoride in water body as well as preparation method and application of the modified HAP composite material
  • Modified HAP composite material for removing fluoride in water body as well as preparation method and application of the modified HAP composite material
  • Modified HAP composite material for removing fluoride in water body as well as preparation method and application of the modified HAP composite material

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preparation example Construction

[0022] The invention discloses a preparation method of a modified HAP composite material, comprising:

[0023] (1) The configured Al 13 solution and (NH 4 ) 3 PO 4 solution or Na 3 PO 4 The solution was added with Ca(NO 3 ) 2 solution or CaCl 2 Aging after reaction in the solution to obtain a mixed solution;

[0024] (2) Filtrating the mixed solution to obtain a precipitate, drying the precipitate and then sintering to obtain the modified HAP composite material.

[0025] In some embodiments of the present invention, the molar ratio of Al and Ca in the mixed solution in step (1) is (3.6 to 3.8):9, specifically 3.62:9, 3.63:9, 3.64:9, 3.65:9, 3.66:9, 3.68:9, 3.7:9, 3.71:9, 3.72:9, 3.73:9, 3.75:9, 3.78:9, 3.8:9; the molar ratio of Ca and P is (2.9 to 3.1): 2, specifically 2.9: 2, 2.95: 2, 3.0: 2, 3.05: 2, 3.1: 2.

[0026] In some embodiments of the present invention, Al described in step (1) 13 The concentration of the solution is 0.08 to 0.12mol / L, specifically 0.08m...

Embodiment 1

[0048] The preparation method of the modified HAP composite material with efficient removal of fluoride in the water body of this implementation, such as figure 1 As shown, through HAP and Al with high-efficiency defluorination performance 13 The combination of fluoride can improve the removal efficiency and adsorption capacity of fluoride, and provide technical support for ensuring good effluent water quality. Specifically include the following steps:

[0049] 1) Prepare AlCl with a concentration of 0.2mol / L 3 solution, 0.25mol / L Na 2 CO 3 Solution, using slow alkali drop method, to 0.2mol / L AlCl 3 Slowly add 0.25mol / L Na to the solution 2 CO 3 solution, the dropping rate is controlled at 0.1-0.15mL·min -1 , and then undergo a purification step to produce [OH + ] and [Al 3+ ] The molar ratio is 2.2:1, Al b >90% Al 13 solution, Al concentration of 0.1mol / L Al 13 solution. Among them, the Al 13 Solution B=2.2, Al b >90%.

[0050] 2) Prepare 0.5mol / L Ca(NO 3 ) ...

Embodiment 2

[0057] The difference between embodiment 2 and embodiment 1 only lies in the Ca(NO 3 ) 2 The solution was changed to CaCl 2 solution, other things remain unchanged, and Al can also be obtained 13 Modified HAP material.

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Abstract

The invention relates to a modified HAP composite material for removing fluoride in water as well as a preparation method and application of the modified HAP composite material. The preparation methodcomprises the following steps: adding a prepared Al13 solution and a (NH4)3PO4 solution or a Na3PO4 solution into a Ca (NO3) 2 solution or a CaCl2 solution, carrying out a reaction and aging the reaction solution to obtain a mixed solution; and filtering the mixed solution to obtain a precipitate, and drying and sintering the precipitate to obtain the modified HAP composite material. The preparation method is simple and feasible, raw materials are easy to obtain, the cost is low, and the possibility of practical application is high; the AL13 modified HAP composite material prepared by the method has better fluorine removal efficiency and higher adsorption capacity.

Description

technical field [0001] The invention relates to the research and development of a novel modified HAP composite material, in particular to a modified HAP composite material for removing fluoride in water, its preparation method and application. Background technique [0002] Among the indicators of drinking water in various countries in the world, fluorine is an indicator other than arsenic, which has large-scale epidemiological data and proves that long-term exposure to drinking water will cause health hazards to the population. Cumulative fluorosis such as dental fluorosis and skeletal fluorosis caused by long-term drinking of high-fluoride water is the most widely affected endemic disease in the world; a population survey of Chinese children has confirmed that excessive fluoride intake also has a significant impact on children's IQ. [0003] From the perspective of engineering application, the more feasible methods for defluoridation of drinking water mainly include coagula...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/14
CPCB01J20/048B01J2220/4806C02F1/281C02F2101/14
Inventor 王东升徐慧童庆
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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