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Porous hydroxyapatite adsorption material as well as preparation method and application thereof

A porous adsorption material, hydroxyapatite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc.

Inactive Publication Date: 2014-12-17
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a simple preparation method for the synthesis of hydroxyapatite porous adsorption materials under normal temperature and pressure has not been reported yet.

Method used

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  • Porous hydroxyapatite adsorption material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First, diammonium hydrogen phosphate and CTAB were dissolved in water and stirred evenly, and the molar ratio of cetyltrimethylammonium bromide and diammonium hydrogen phosphate was 1:30. Dissolve calcium chloride in water and stir well, and adjust the pH of the solution to 10 with ammonia water. Add the aqueous solution of diammonium hydrogen phosphate and CTAB dropwise to the calcium chloride solution to form a milky white suspension, and stir at 30°C for 30min. The molar ratio of calcium chloride and diammonium hydrogen phosphate is 5:3. Adjust the pH value of the suspension to 12 with ammonia water, stir at 30°C for 30 minutes, age for 12 hours, wash with ethanol and deionized water three times, and dry at 100°C for more than 10 hours to obtain porous hydroxyapatite.

[0017] The porous adsorption material of hydroxyapatite was used in the wastewater treatment of an electroplating factory, and its removal rate of nickel ions was 84.3%.

Embodiment 2

[0019] First, dissolve disodium hydrogen phosphate and CTAB in water and stir evenly. The molar ratio of cetyltrimethylammonium bromide and disodium hydrogen phosphate is 1:30. Dissolve calcium nitrate in water and stir well, and adjust the pH of the solution to 10 with ammonia water. Add the aqueous solution of disodium hydrogen phosphate and CTAB dropwise to the calcium nitrate solution to form a milky white suspension, and stir at 30°C for 30 minutes. The molar ratio of calcium nitrate and disodium hydrogen phosphate is 5:3. Adjust the pH value of the suspension to 10 with ammonia water, stir at 30°C for 30 minutes, age for 12 hours, wash with ethanol and deionized water three times, and dry at 100°C for more than 10 hours to obtain porous hydroxyapatite.

[0020] The porous adsorption material of hydroxyapatite was used in the wastewater treatment of an electroplating factory, and its removal rate of nickel ions was 81.9%.

Embodiment 3

[0022] First, dissolve diammonium hydrogen phosphate and CTAB in water and stir evenly, and the molar ratio of cetyltrimethylammonium bromide and diammonium hydrogen phosphate is 1:10. Dissolve calcium nitrate in water and stir well, and adjust the pH of the solution to 10 with ammonia water. Add the aqueous solution of diammonium hydrogen phosphate and CTAB dropwise to the calcium nitrate solution to form a milky white suspension, and stir at 30°C for 30min. The molar ratio of calcium nitrate and diammonium hydrogen phosphate is 5:3. Adjust the pH value of the suspension to 11 with ammonia water, stir at 30°C for 30 minutes, age for 24 hours, wash with ethanol and deionized water three times, and dry at 100°C for more than 10 hours to obtain porous hydroxyapatite.

[0023] The porous adsorption material of hydroxyapatite was used in the wastewater treatment of an electroplating factory, and its removal rate of nickel ions was 93.1%.

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Abstract

The invention relates to a porous hydroxyapatite adsorption material as well as a preparation method and application thereof. The preparation method of the porous hydroxyapatite adsorption material comprises the following steps: dissolving hydrogen phosphate and hexadecyl trimethyl ammonium bromide in water, uniformly stirring and dropwise adding into a calcium salt aqueous solution with a pH value of 10 to form turbid liquid, and stirring at the temperature of 30 DEG C for 30 minutes; and adding ammonia water into the turbid liquid for adjusting a pH value, stirring at the temperature of 30 DEG C for 30 minutes, then ageing, washing and drying to obtain the porous hydroxyapatite adsorption material. The preparation method of the porous hydroxyapatite adsorption material is simple in process and capable of treating over 80% of nickel ions in electroplating wastewater in one hour.

Description

technical field [0001] The invention relates to a porous adsorption material and its preparation method and application, in particular to a hydroxyapatite porous adsorption material and its preparation method and application. Background technique [0002] Hydroxyapatite has a special crystal structure, which has a good adsorption and fixation effect on divalent heavy metal ions, fluoride ions, and organic pollutants. It has good coordination with the environment and is not easy to cause secondary pollution. It is a kind of environmental pollution New functional materials for governance. The adsorption capacity of hydroxyapatite to heavy metals is related to the specific surface area and crystallinity of hydroxyapatite. The larger the specific surface area, the greater the adsorption capacity, and the worse the crystallinity, the better the adsorption effect. The preparation of hydroxyapatite nanoparticles can greatly increase the specific surface area of ​​the material and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/30C02F1/28C02F1/62C02F103/16
Inventor 何丹农王婷董亚梅
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH