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Aluminum oxide-hydroxyapatite-chitosan composite adsorption material, preparation method and application thereof

A composite adsorption material, hydroxyapatite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of complex preparation process of adsorption materials, high processing cost, environmental pollution, etc., to achieve Good economic benefits, reduce environmental pollution, and high economic benefits

Pending Publication Date: 2021-09-17
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the removal of the above two organic pollutants, the most common solutions are adsorption and photocatalytic degradation, but the preparation process of the adsorbent material using the adsorption method is complicated and the processing cost is high. The phenomenon of shedding, causing the adsorbent to dissolve in the environmental water, may also cause additional environmental pollution problems

Method used

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  • Aluminum oxide-hydroxyapatite-chitosan composite adsorption material, preparation method and application thereof
  • Aluminum oxide-hydroxyapatite-chitosan composite adsorption material, preparation method and application thereof
  • Aluminum oxide-hydroxyapatite-chitosan composite adsorption material, preparation method and application thereof

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Embodiment 1

[0035] A preparation method of aluminum oxide-hydroxyapatite-chitosan composite adsorption material, comprising the following steps:

[0036] Step 1, 6g chitosan is dissolved in 60mL, volume fraction is in the acetic acid solution of 2%, makes chitosan solution;

[0037] Step 2. Add 200mL, 1mol / L alumina solution to 200mL, 1mol / L, calcium chloride / phosphoric acid solution with a mass fraction of 40%, stir continuously for 2.5h, and then add 100mL of 30% Ammonia, after continuing to stir at room temperature for 1.5h, was washed and dried to obtain alumina-hydroxyapatite material;

[0038] Calcium chloride / phosphoric acid solution is prepared according to the following steps: calcium chloride and phosphoric acid with a molar ratio of 5:3 are jointly added to deionized water;

[0039] Step 3. Add 60 mg of the alumina-hydroxyapatite material prepared in step 2 to 1 L of the chitosan solution prepared in step 1, stir for 2.5 hours to obtain a mixed solution, and add the mixed solu...

Embodiment 2

[0041] A preparation method of aluminum oxide-hydroxyapatite-chitosan composite adsorption material, comprising the following steps:

[0042] Step 1, 7g chitosan is dissolved in 60mL, volume fraction is in the acetic acid solution of 2%, makes chitosan solution;

[0043] Step 2. Add 200mL, 1mol / L alumina solution to 200mL, 1mol / L, calcium chloride / phosphoric acid solution with a mass fraction of 40%, stir continuously for 2.5h, and then add 100mL of 30% Ammonia, after continuing to stir at room temperature for 1.5h, was washed and dried to obtain alumina-hydroxyapatite material;

[0044] Calcium chloride / phosphoric acid solution is prepared according to the following steps: calcium chloride and phosphoric acid with a molar ratio of 5:3 are jointly added to deionized water;

[0045] Step 3. Add 120 mg of the alumina-hydroxyapatite material prepared in step 2 to 1 L of the chitosan solution prepared in step 1, stir for 2.5 hours to obtain a mixed solution, and add the mixed solut...

Embodiment 3

[0047] A preparation method of aluminum oxide-hydroxyapatite-chitosan composite adsorption material, comprising the following steps:

[0048] Step 1, 5g chitosan is dissolved in 70mL, volume fraction is in the acetic acid solution of 2%, makes chitosan solution;

[0049] Step 2. Add 60 mL of 0.5 mol / L alumina solution to 180 mL of 1 mol / L calcium chloride / phosphoric acid solution with a mass fraction of 40%, stir continuously for 2 hours, and then add 84 mL of ammonia water with a volume fraction of 30% , continue to stir at room temperature for 1 hour, and then wash and dry to obtain alumina-hydroxyapatite material;

[0050] Calcium chloride / phosphoric acid solution is prepared according to the following steps: calcium chloride and phosphoric acid with a molar ratio of 5:3 are jointly added to deionized water;

[0051] Step 3. Add 30 mg of the alumina-hydroxyapatite material prepared in step 2 to 1 L of the chitosan solution prepared in step 1, stir for 3 hours to obtain a m...

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Abstract

The invention relates to the technical field of water treatment adsorption materials, in particular to an aluminum oxide-hydroxyapatite-chitosan composite adsorption material, a preparation method and application thereof. The preparation method comprises the following steps: preparing a chitosan solution, then adding an aluminum oxide-hydroxyapatite material in proportion, and then dropwise adding the mixture into a sodium hydroxide solution, and carrying out curing forming to obtain the spherical aluminum oxide-hydroxyapatite-chitosan composite adsorption material. According to the invention, the adsorption material is simple in preparation process, does not need expensive and complex instruments and equipment, and is relatively short in production period and low in cost; the whole adsorption material has good adsorption performance on pollutants and high adsorption equilibrium speed, and the material can be recycled for multiple times after being regenerated after being adsorbed, so that the utilization rate of the material is effectively improved, and the use cost is reduced; and the composite adsorption material disclosed by the invention is prepared from ecological environment-friendly materials, so that little or no secondary pollution is caused to the environment in the adsorption process.

Description

technical field [0001] The invention relates to the technical field of water treatment adsorption materials, in particular to an alumina-hydroxyapatite-chitosan composite adsorption material and its preparation method and application. Background technique [0002] In recent years, the prevalence of pollutants in the water environment has become a worldwide problem. A large number of pollutants mainly come from human industrial production activities, including paint industry, pharmaceuticals, heavy metals, anions, daily necessities, steroid hormones and agricultural chemicals. Such substances usually appear at low concentration levels in water, and because each substance may interact with other substances in the water body, the diversity and complexity of its existing forms in water increase, which not only makes measurement and analysis, and make it more difficult to separate from water bodies. More importantly, since they exist in water resources and play endocrine-disrup...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/20B01J20/08B01J20/048C02F1/288C02F2101/20C02F2101/30
Inventor 许轲韩李龙赵凡丁
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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