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Preparation and application of magnetic hydroxyapatite/graphene oxide adsorbent

A technology of hydroxyapatite and graphene, applied in the direction of adsorption water/sewage treatment, other chemical processes, water/sewage treatment, etc., to achieve the effect of excellent physical and chemical properties and mechanical properties, simple preparation process, and efficient removal

Inactive Publication Date: 2015-01-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The magnetic hydroxyapatite / graphene oxide in the present invention has simple preparation method as an adsorbent, high adsorption capacity, reusability, environmental protection, and no published patents and literature reports

Method used

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Examples

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Embodiment 1

[0020] Example 1 A preparation method of magnetic hydroxyapatite / graphene oxide adsorbent

[0021] (1) Magnetic ferric oxide, characterized in that 0.5 g of ferric chloride was dissolved in 20 mL of ethanol, 2.0 g of anhydrous sodium acetate and 10 mL of ethylenediamine were added, mechanically stirred for 15 min, and transferred to 100 mL of reaction In the still, react at 200 °C for 8 h, cool to room temperature, wash with deionized water until neutral, dry in vacuum at 50 °C, and grind into powder;

[0022] (2) Mix 250 mL, 0.025 mol / L calcium nitrate and 30 mL, 0.3 mol / L ammonium bicarbonate uniformly with mechanical stirring, add 0.10 g magnetic ferric iron tetroxide, and ultrasonicate for 5 min to disperse the magnetic ferric ferric oxide evenly , slowly add 150 mL, 0.20 mol / L ammonium hydrogen phosphate, maintain the pH of the system at 10 with ammonia water, keep the reaction for 40 min in a water bath at 45 °C, and age the reacted system for 24 h to obtain an aged syst...

Embodiment 2

[0024] Example 2 A preparation method of magnetic hydroxyapatite / graphene oxide adsorbent

[0025] (1) Magnetic ferric oxide, characterized in that 1.0 g of ferric chloride was dissolved in 20 mL of ethanol, 30 g of anhydrous sodium acetate and 10 mL of ethylenediamine were added, mechanically stirred for 20 min, and transferred to 100 mL of reaction In the kettle, react at 200 °C for 9 h, cool to room temperature, wash with deionized water until neutral, dry in vacuum at 50 °C, and grind into powder;

[0026] (2) Mix 300 mL, 0.025 mol / L calcium nitrate and 40 mL, 0.3 mol / L ammonium bicarbonate uniformly with mechanical stirring, add 0.15 g of magnetic ferric iron tetroxide, and disperse the magnetic ferric ferric oxide evenly by ultrasonication for 5 min , slowly add 180 mL, 0.30 mol / L ammonium hydrogen phosphate, maintain the pH of the system at 10 with ammonia water, keep the reaction for 40 min in a water bath at 45 °C, and age the reacted system for 24 h to obtain an agin...

Embodiment 3

[0028] Example 3 A preparation method of magnetic hydroxyapatite / graphene oxide adsorbent

[0029] (1) Magnetic ferric oxide, characterized in that 2.0 g of ferric chloride was dissolved in 20 mL of ethanol, 4.0 g of anhydrous sodium acetate and 10 mL of ethylenediamine were added, mechanically stirred for 30 min, and transferred to 100 mL of reaction In the kettle, react at 200°C for 10 h, cool to room temperature, wash with deionized water until neutral, dry in vacuum at 50°C, and grind into powder;

[0030] (2) Mix 350 mL, 0.025 mol / L calcium nitrate and 50 mL, 0.3 mol / L ammonium bicarbonate uniformly with mechanical stirring, add 0.20 g magnetic ferric iron tetroxide, and ultrasonicate for 5 min to disperse the magnetic ferric ferric oxide evenly , slowly add 200 mL, 0.40 mol / L ammonium hydrogen phosphate, maintain the pH of the system at 10 with ammonia water, keep the reaction for 40 min in a water bath at 45 °C, and age the reacted system for 24 h to obtain an aged syst...

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Abstract

The invention relates to preparation and application of a magnetic hydroxyapatite / graphene oxide adsorbent. The preparation method comprises the following steps: mechanically stirring and mixing 50-350mL of 0.025mol / L calcium nitrate and 30-50mL of 0.30mol / L ammonium bicarbonate to be uniform, adding 0.10-0.20g of magnetic ferroferric oxide, maintaining the pH value of the system to be 10 by using ammonia water, reacting in a water bath at the temperature of 45 DEG C for 40 minutes, thereby obtaining an aging system; adding a graphene oxide dispersing system into the aging system, thereby preparing the magnetic hydroxyapatite / graphene oxide adsorbent. According to the preparation method disclosed by the invention, magnetic hydroxyapatite / graphene serves as an adsorbent, the preparation method is simple and feasible, the adsorption capacity is high, the adsorbent has excellent physical and chemical properties and mechanical property, heavy metal ion wastewater can be effectively treated and can be recycled, and the adsorption process is green and environmentally friendly.

Description

technical field [0001] The invention relates to the preparation and application of a magnetic hydroxyapatite / graphene oxide adsorbent, which is suitable for the removal of heavy metal ions in industrial wastewater and belongs to the fields of magnetic phosphate nanocomposite materials, environmental science and engineering. Background technique [0002] Heavy metal pollution is one of the water pollution problems. With the acceleration of urbanization and the rapid development of industry and agriculture, more and more heavy metals are discharged into rivers and lakes. In addition to the high toxicity, bioaccumulation and non-degradability of heavy metals, nearly 80% of the world's residents drink daily Water is not up to hygienic standards. After heavy metals enter the human body, they can be enriched in the organs of the human body, which will cause acute, subacute, and chronic poisoning of the human body, which will cause great harm to the human body. Adsorption method ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62
CPCB01J20/223B01J20/28009C02F1/288
Inventor 杜斌崔莉梅魏琴闫涛闫良国胡丽华
Owner UNIV OF JINAN
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