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A kind of chitosan-mimetic thin aluminum doped magnetic adsorbent and preparation method thereof

A technology of imitating thin water aluminum and magnetic adsorbent, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc., can solve the problems of long time for precipitation, difficult separation, etc. , large adsorption capacity, strong magnetic effect

Inactive Publication Date: 2017-01-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this AlCs composite material is difficult to separate from the water body after adsorption, and it takes a long time for precipitation

Method used

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  • A kind of chitosan-mimetic thin aluminum doped magnetic adsorbent and preparation method thereof
  • A kind of chitosan-mimetic thin aluminum doped magnetic adsorbent and preparation method thereof
  • A kind of chitosan-mimetic thin aluminum doped magnetic adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Chitosan-mimetic thin aluminum doped magnetic adsorbent, its preparation process is as follows:

[0026] (1) Weigh 2.0g of ferric chloride (FeCl 3 ·6H 2 O) Evenly dispersed in 80mL ethylene glycol to make a solution. And under stirring condition, add PVP (2.00g) and anhydrous sodium acetate (7.20g) successively, stir to form a homogeneous system. The mixture was transferred to a 100mL reactor with a polytetrafluoroethylene liner and sealed. Finally, the autoclave was placed in an electric blast drying oven and heated to 180°C for constant temperature reaction for 8h. After cooling, the resulting suspension was magnetically separated to obtain a black powdery substance. After washing the powder 3 times with dehydrated ethanol, transfer it to a 50 mL volumetric flask with ethanol as the medium, and dilute to 50 mL with ethanol. A superparamagnetic nano-fluid is obtained.

[0027] (2) Weigh 1.0g of aluminum isopropoxide and dissolve it in 300mL of absolute ethanol, an...

Embodiment 2

[0038]Chitosan-mimetic thin aluminum doped magnetic adsorbent, its preparation process is as follows:

[0039] (1) Weigh 3.0g of ferric chloride (FeCl 3 ·6H 2 O) Evenly dispersed in 80mL ethylene glycol to make a solution. Then add PVP (3.0g) and anhydrous sodium acetate (9.0g) successively under stirring condition, and stir to form a homogeneous system. The mixture was transferred to a 100mL reactor with polytetrafluoroethylene liner and sealed. Finally, the autoclave was placed in an electric blast drying oven and heated to 200°C for constant temperature reaction for 10h. After cooling, the resulting suspension was magnetically separated to obtain a black powdery substance. After washing the powder 3 times with dehydrated ethanol, transfer it to a 50 mL volumetric flask with ethanol as the medium, and dilute to 50 mL with ethanol. A superparamagnetic nano-fluid is obtained.

[0040] (2) Weigh 1.0g of aluminum isopropoxide and dissolve it in 150mL of absolute ethanol, an...

Embodiment 3

[0048] Chitosan-mimetic thin aluminum doped magnetic adsorbent, its preparation process is as follows:

[0049] (1) Weigh 4.0g of ferric chloride (FeCl 3 ·6H 2 O) Evenly dispersed in 80mL ethylene glycol to make a solution. Then add PVP (3.0g) and anhydrous sodium acetate (6.0g) successively under stirring condition, and stir to form a homogeneous system. The mixture was transferred to a 100mL reactor with a polytetrafluoroethylene liner and sealed. Finally, the autoclave was placed in an electric blast drying oven and heated to 160°C for constant temperature reaction for 6h. After cooling, the resulting suspension was magnetically separated to obtain a black powdery substance. After washing the powder 3 times with dehydrated ethanol, transfer it to a 50 mL volumetric flask with ethanol as the medium, and dilute to 50 mL with ethanol. A superparamagnetic nano-fluid is obtained.

[0050] (2) Weigh 0.2g of aluminum isopropoxide and dissolve it in 150mL of absolute ethanol, ...

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Abstract

The invention provides a preparation method of a chitosan-pseudo boehmite doped magnetic adsorbent. The preparation method comprises the steps of preparation of a ferroferric oxide core, preparation of an ethanol solution of nano ferroferric oxide-isopropanol aluminum, preparation of a chitosan-acetic acid solution, preparation of the chitosan-pseudo boehmite doped magnetic adsorbent and the like. The invention also provides the chitosan-pseudo boehmite doped magnetic adsorbent which takes nano ferroferric oxide as the core, and doped with pseudo boehmite and crosslinked chitosan on the surface. The magnetic composite adsorbent prepared by the method has adsorption performance for cations and anions simultaneously, is large in adsorption capacity and high in moisture content, and has the advantages of high magnetism, stable properties, high mechanical properties and the like.

Description

technical field [0001] The invention belongs to the field of material science and environmental engineering, and relates to a composite adsorption material with good selectivity to heavy metal ions in groundwater, good adsorption performance and reusability and a preparation method thereof, in particular to a nano-ferric oxide as a core 1. A method for preparing an adsorbent whose surface is doped with mimic boehmite and cross-linked chitosan. Background technique [0002] There are a large number of heavy metals and fluoride ions in groundwater, and there are various separation and enrichment methods, mainly including adsorption method, chemical precipitation method, electrodialysis method, extraction method, membrane method and so on. [0003] Adsorption is one of the cheaper water treatment methods. Common adsorption materials include activated carbon, activated alumina, nano-ferric oxide, chitosan, etc. Among the existing reports, aluminum-doped adsorbent is a promising...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/58C02F1/62
CPCB01J20/06B01J20/08B01J20/24B01J2220/46C02F1/288C02F2101/14C02F2101/20C02F2101/22
Inventor 陈卫万震刘成何思源
Owner HOHAI UNIV
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