Preparation method of cationic polyamino acid magnetic adsorbent

A magnetic adsorbent, polyamino acid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., to achieve good structural stability and improve adsorption efficiency.

Inactive Publication Date: 2018-12-14
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the defects of existing anionic pollutants and adsorbents for dye treatment, and firstly provide a method for preparing a recyclable cationic polyamino acid magnetic adsorbent

Method used

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  • Preparation method of cationic polyamino acid magnetic adsorbent
  • Preparation method of cationic polyamino acid magnetic adsorbent
  • Preparation method of cationic polyamino acid magnetic adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0037] FeCl 3 ·6H 2 O 2.0 g and FeCl 2 4H 2 Add 0.8 g of O into 40 mL of deionized water, and stir at a speed of 700 r / min to raise the temperature to 80°C under nitrogen gas. After stirring for another 30 minutes, add ammonia water to adjust the pH of the solution to 9, raise the temperature to 90°C, and continue the reaction for 120 minutes. After the reaction, the product was cooled to room temperature, centrifuged, and the upper liquid was removed, washed with 100mL ethanol and deionized water, and repeated 5 times; the obtained product was vacuum-dried at 50°C for 3h to obtain Fe 3 o 4 Magnetic nanoparticles, finally ground for use.

[0038] Fe 3 o 4Put 0.40g of magnetic nanoparticles into a mixed solvent of 40mL deionized water and 5mL ethanol, ultrasonically disperse for 10min, add 2mL ammonia water and 1.3mL orthosilicate ethyl ester, stir and react at room temperature at a speed of 600r / min for 3.5h, and react After centrifugation, remove the upper liquid, wash...

Embodiment 2

[0042] FeCl 3 ·6H 2 O 2.2g and FeCl 2 4H 2 O 0.9 g was added to 50 mL of deionized water, under nitrogen, stirred at a speed of 700 r / min and heated to 80 ° C, after stirring for 30 min, ammonia water was added to adjust the pH of the solution to 9, the temperature was raised to 90 ° C, and the reaction was continued for 120 min. After the reaction, the product was cooled to room temperature, centrifuged, and the upper liquid was removed, washed with 100mL ethanol and deionized water, and repeated 5 times; the obtained product was vacuum-dried at 50°C for 3h to obtain Fe 3 o 4 Magnetic nanoparticles, finally ground for use.

[0043] Fe 3 o 4 Put 0.40g of magnetic nanoparticles into a mixed solvent of 45mL of deionized water and 6mL of ethanol, ultrasonically disperse for 10min, add 2mL of ammonia water and 1.4mL of ethyl silicate, stir and react at room temperature at a speed of 600r / min for 3.5h, and react After centrifugation, remove the upper liquid, wash 5 times wit...

Embodiment 3

[0047] FeCl 3 ·6H 2 O 2.4g and FeCl 2 4H 2 O 1.0g was added to 60mL deionized water, under nitrogen, stirred at a speed of 700r / min and heated to 80°C, stirred for another 30min, added ammonia water to adjust the pH of the solution to 9, heated to 90°C, and continued to react for 120min. After the reaction, the product was cooled to room temperature, centrifuged, and the upper liquid was removed, washed with 100mL ethanol and deionized water, and repeated 5 times; the obtained product was vacuum-dried at 50°C for 3h to obtain Fe 3 o 4 Magnetic nanoparticles, finally ground for use.

[0048] Fe 3 o 4 Put 0.40g of magnetic nanoparticles into a mixed solvent of 50mL deionized water and 7mL ethanol, ultrasonically disperse for 10min, add 2mL ammonia water and 1.5mL orthosilicate ethyl ester, stir and react at room temperature at a speed of 600r / min for 3.5h, and react After centrifugation, remove the upper liquid, wash 5 times with 100mL deionized water, and vacuum-dry the ...

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Abstract

The invention discloses a preparation method of a cationic polyamino acid magnetic adsorbent. The preparation method comprises the steps of preparing composite nanoparticles of silica-coated ferroferric oxide of a core-shell structure by using the conventional co-precipitation method and hydrolysis method, then hydrolyzing a compound carrying a cationic polyamino acid group with a hydrobromic acid / acetic acid solution, dialyzing and freeze-drying to obtain a polyamino acid solid powder, reacting the composite nanoparticles, the polyamino acid solid powder, dimethacrylate and an initiator, separating, washing and drying to obtain the cationic polyamino acid magnetic adsorbent. The method is simple, mild in condition, strong in controllability and easy to operate; the prepared adsorbent hasgood structural stability, is not affected by the factors such as temperature and ion concentration and has high adsorption efficiency, and the polyamino acid macromolecules therein are biodegradableto reduce secondary pollution to water bodies.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of composite adsorbent materials, and in particular relates to a preparation method of a recyclable cationic polyamino acid magnetic adsorbent. Background technique [0002] With the increase of population and the rapid development of industrialization, water pollution has become one of the most important problems of current environmental pollution. Common pollutants in water pollution include heavy metals, dyes, antibiotics, pesticides, oil, etc. [0003] Among them, because heavy metals are difficult to degrade, highly toxic, and persistent, and can also enter organisms through the food chain, they cause great harm to human health and the ecological environment. Heavy metal pollution includes cationic pollutants and anionic pollutants. There have been relatively in-depth studies on the treatment of cationic pollutants, such as mercury (Hg 2+ ), cadmium (Cd 2+ ), lead (Pb ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22C02F101/30
CPCB01J20/0229B01J20/103B01J20/267B01J20/28009C02F1/285C02F2101/22C02F2101/308
Inventor 周庆翰陈康隆
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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