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Production method of modified hydroxyapatite for efficiently removing fluoride in water body

A technology of hydroxyapatite and fluoride, applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve the problem of low adsorption capacity, achieve scientific preparation methods, good ability to remove fluoride, and raw materials Easy to get effect

Inactive Publication Date: 2019-12-03
江苏长江水务股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As one of the most studied bioactive materials, hydroxyapatite has good bioactivity and compatibility, is easy to prepare, and has a certain adsorption effect on fluoride in aqueous solution, but its adsorption capacity is relatively low.

Method used

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  • Production method of modified hydroxyapatite for efficiently removing fluoride in water body
  • Production method of modified hydroxyapatite for efficiently removing fluoride in water body
  • Production method of modified hydroxyapatite for efficiently removing fluoride in water body

Examples

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Embodiment

[0020] (1) to AlCl 3 Add Na to the solution 2 CO 3 , the preparation of polyaluminium chloride with a degree of alkalization of 2.0;

[0021] (2) Utilize the polyaluminum chloride prepared in step (1) to prepare the required nanometer Al 13 solution;

[0022] (3) Weigh a hydroxyapatite sample of a certain quality, and disperse it uniformly in absolute ethanol to prepare a hydroxyapatite suspension;

[0023] (4) the nano-Al prepared by step (2) 13 Add dropwise to the hydroxyapatite suspension prepared in step (3), react at a temperature of 25° C. for 1.0 h, and age for 12.0 h. After aging, suction filter, wash, and dry at 80° C. The modified hydroxyapatite is obtained after grinding.

[0024] As shown in Figure 1, the initial fluoride is 10 mg / L, the volume is 50 ml, the mass of hydroxyapatite is 0.05 g, the adsorption time is 12 h, and the adsorption temperature is 25 °C; When the ratio increases, the fluoride removal rate is significantly improved. When the molar mass ...

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Abstract

The invention relates to a production method of modified hydroxyapatite for efficiently removing fluoride in a water body, and belongs to the technical field of water treatment. The modified hydroxyapatite for efficiently removing the fluoride in the water body is obtained through the method which comprises the following steps: (1) adding an alkali into an AlCl3 solution to produce polyaluminum chloride with an alkalisation degree of 2.0; (2) producing a required nanometer Al13 solution by means of the polyaluminum chloride produced in the step (1); (3) weighing a certain mass of hydroxyapatite sample, and evenly dispersing the hydroxyapatite sample in absolute ethyl alcohol to produce a hydroxyapatite suspension; and (4) adding the nanometer Al13 produced in the step (2) into the hydroxyapatite suspension produced in the step (3) dropwise, carrying out a reaction at certain temperature for a period of time, conducting suction filtration after ageing is conducted, and conducting washing, drying and grinding to obtain the modified hydroxyapatite. According to the production method of the modified hydroxyapatite for efficiently removing the fluoride in the water body, the nanometer Al13 and the hydroxyapatite are combined, powerful adsorption capability of the nanometer A13 of the fluoride is given play to, and through a synergistic effect of the nanometer Al13 and the hydroxyapatite, the fluoride removing efficiency can be efficiently improved. The operation method is simple and easy to implement, the raw materials are easy to obtain, and the cost is low so that the operation method can be applied to a wide variety of actual work.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a modified hydroxyapatite and a preparation method thereof, in particular to a preparation method of a modified hydroxyapatite capable of efficiently removing fluoride in water bodies. Background technique [0002] As one of the most studied bioactive materials, hydroxyapatite has good bioactivity and compatibility, is easy to prepare, and has a certain adsorption effect on fluoride in aqueous solution, but its adsorption capacity is relatively low. According to the special surface characteristics and good affinity of hydroxyapatite, researchers modified it by doping, pore expansion, surface modification and other technologies to improve its adsorption performance. [0003] Studies have shown that due to the strong affinity between fluoride and Al, the adsorption of fluorine on various Al compounds mainly occurs on the surface Al atoms. For compounds containing Al-O or OH, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04C02F1/28B01J20/30C02F101/14
CPCB01J20/048B01J20/0248B01J20/027C02F1/281C02F2101/14
Inventor 张放明颜勇郑全兴刘锐袁松奎周纯洁朱敏徐慧金燕
Owner 江苏长江水务股份有限公司
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