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Method for preparing magnetic adsorbents on basis of iron-based metal-organic framework materials and application of magnetic adsorbents

A magnetic adsorbent, organic framework technology, applied in the directions of alkali metal compounds, chemical instruments and methods, adsorbed water/sewage treatment, etc. Recycling, no secondary pollution, environment-friendly effect

Active Publication Date: 2016-06-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the chemical method has the disadvantages of high cost of chemicals and easy to cause secondary pollution. Many research results of the biological method are only in the experimental stage, so it is difficult to achieve the purpose of practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) La-Fe 3 o 4 Preparation of MIL-101(Fe) Magnetic Composite Material

[0022] La-Fe 3 o 4 Preparation: first mix 2.6gFeCl 3 , 0.22gLa(NO 3 ) 3 ·6H 2 O and 1.0g of sodium citrate were dissolved in 80mL of ethylene glycol, then 4.0g of sodium acetate was added, stirred vigorously for 30min, and then the solution was packaged in a polytetrafluoroethylene-lined reactor, reacted at 200°C for 10h, and cooled to At room temperature, the black solid obtained by centrifugation was washed several times with ethanol, deionized water and ethanol successively, and dried under vacuum at 60°C.

[0023] La-Fe 3 o 4 Preparation of MIL-101(Fe) magnetic composite material: 1.013gLa-Fe 3 o 4 and 0.206g of terephthalic acid were ultrasonically dispersed in 15mL of DMF, and then 0.675g of FeCl was added 3 ·6H 2 O, magnetically stirred for 15 min, reacted in a polytetrafluoroethylene-lined autoclave at 110°C for 24h; cooled to room temperature, centrifuged, washed with water an...

Embodiment 2

[0028] (1) La-Fe 3 o 4 Preparation of MIL-100(Fe) Magnetic Composite Material

[0029] La-Fe 3 o 4 Preparation: first mix 2.6gFeCl 3 , 0.020gLa(NO 3 ) 3 ·6H 2 O and 1.0g of sodium citrate were dissolved in 80mL of ethylene glycol, then 4.0g of sodium acetate was added, stirred vigorously for 30min, and then the solution was packaged in a polytetrafluoroethylene-lined reactor, reacted at 200°C for 10h, and cooled to At room temperature, the black solid obtained by centrifugation was washed several times with ethanol, deionized water and ethanol successively, and dried under vacuum at 60°C.

[0030] La-Fe 3 o 4 Preparation of MIL-100(Fe) magnetic composite material: 0.605gLa-Fe 3 o 4 and 0.4102g of trimesic acid were ultrasonically dispersed in 15mLH 2 O, then add 0.605gFeCl 3 ·6H 2 O, magnetically stirred for 15 min, reacted in a polytetrafluoroethylene-lined autoclave at 150°C for 15h; cooled to room temperature, centrifuged, washed with water and ethanol, and fina...

Embodiment 3

[0035] (1) La-Fe 3 o 4 Preparation of MIL-88B(Fe) Magnetic Composite Material

[0036] La-Fe 3 o 4 Preparation: first mix 2.6gFeCl 3 , 0.22gLa(NO 3 ) 3 ·6H 2 O and 1.0g of sodium citrate were dissolved in 80mL of ethylene glycol, then 4.0g of sodium acetate was added, stirred vigorously for 30min, and then the solution was packaged in a polytetrafluoroethylene-lined reactor, reacted at 200°C for 10h, and cooled to At room temperature, the black solid obtained by centrifugation was washed several times with ethanol, deionized water and ethanol successively, and dried under vacuum at 60°C.

[0037] La-Fe 3 o 4 MIL-88B (Fe) magnetic composite material preparation: 0.405gLa-Fe 3 o 4 and 0.348g terephthalic acid were ultrasonically dispersed in 15mLDMF and 1.2mL2mol / LNaOH mixed solution, and then 1.122gFe(NO 3 ) 3 9H 2 O, magnetically stirred for 15 min, reacted in a polytetrafluoroethylene-lined autoclave at 100°C for 12h; cooled to room temperature, centrifuged, was...

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Abstract

The invention discloses a method for preparing magnetic adsorbents on the basis of iron-based metal-organic framework materials and application of the magnetic adsorbents. The method includes preparing La-doped nanometer Fe3O4(La-Fe3O4) by the aid of solvent-thermal processes and then wrapping the surfaces of the nanometer Fe3O4(La-Fe3O4) with metal-organic framework materials MIL(Fe) to obtain magnetic composite materials La-Fe3O4@MIL(Fe); applying the magnetic composite materials La-Fe3O4@MIL(Fe) to absorbing and removing phosphate in water. The method and the application have the advantages that phosphate radicals in the water can be efficiently adsorbed and removed by the magnetic adsorbents, the magnetic adsorbents are environmentally friendly, are easy to recycle and are reusable, equipment for implementing the method is simple and is convenient to operate, and accordingly the method has an excellent application prospect.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a preparation method and application of a magnetic adsorbent based on an iron-based metal-organic framework material. Background technique [0002] Phosphorus is one of the nutrient elements that cause eutrophication in various water bodies. Excessive phosphorus entering the water body through various channels will lead to the excessive growth of algae and other aquatic organisms, thereby destroying the original ecological balance of the water body and affecting water quality and aquatic life. biological threat. Therefore, the removal method of phosphate in water has become a research hotspot, and it is of great practical significance to develop an efficient and low-cost technology for removing phosphate in water. [0003] Currently, phosphate removal technologies include chemical methods, biological methods, and adsorption methods. Among them, the chemical metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/226B01J20/28009C02F1/285C02F2101/105
Inventor 刘华国伟林李祥惠刘中华王瑞芹
Owner UNIV OF JINAN
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