Preparation method of Fe3O4@MnO2/active carbon magnetic compound adsorption material

A technology of composite adsorption material and activated carbon, which is applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of limited application, difficult separation, small adsorption capacity, etc., and achieve cheap synthetic materials and synthetic methods Simple, good adsorption effect

Inactive Publication Date: 2013-04-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, powdered activated carbon has the advantages of fast adsorption speed and low dosage, but it has the problem of difficult separation in practical application. The traditional filtration separation method increases the processing cost and easily causes screen blockage. Compared with the filtration method, the magnetic Separation is a simple and efficient separation method
Magnetic fine particle adsorbents (such as: CuFe 2 o 4 , MnO-Fe 2 o 3 or nano Fe 3 o 4 ) has the disadvantages of small adsorption capacity, poor dispersion or narrow applicable pH range, which limits its application in the field of water treatment

Method used

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  • Preparation method of Fe3O4@MnO2/active carbon magnetic compound adsorption material
  • Preparation method of Fe3O4@MnO2/active carbon magnetic compound adsorption material
  • Preparation method of Fe3O4@MnO2/active carbon magnetic compound adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (1) Put 0.7g ferrous sulfate (FeSO 4 ·7H 2 O) dissolved in 50mL deionized water (filled with high-purity N 2 To remove dissolved oxygen), add 0.5g coconut shell powdered activated carbon, stir vigorously at 25°C for 30min, then quickly add 1mL of 5M ammonia water, stir vigorously for 5min to obtain suspension A;

[0019] (2) According to Fe 2+ / OH - / Mn 7+ Quickly add 0.25M potassium permanganate solution dropwise into the suspension A with a molar ratio of 4.5:9:0.5, and stir vigorously to make it evenly mixed, and age it hydrothermally at 25°C for 12 hours to obtain the brown-black product B ;

[0020] (3) Wash the obtained brown-black product B repeatedly with a large amount of deionized water, and separate it with a strong magnet;

[0021] (4) Vacuum-dry the brown-black product after washing and separation at 60°C to constant weight to obtain the desired product.

Embodiment 2

[0023] (1) Put 0.7g ferrous sulfate (FeSO 4 ·7H 2 O) dissolved in 50mL deionized water (filled with high-purity N 2 To remove dissolved oxygen), add 0.5g coconut shell powdered activated carbon, stir vigorously at 25°C for 30min, then quickly add 1mL of 5M ammonia water, stir vigorously for 5min to obtain suspension A;

[0024] (2) According to Fe 2+ / OH - / Mn 7+ Quickly add 0.25M potassium permanganate solution dropwise into the suspension A at a molar ratio of 4.5:9:0.75, and stir vigorously to make it evenly mixed, and age it hydrothermally at 25°C for 12 hours to obtain the brown-black product B ;

[0025] Steps (3) and (4) in Example 1 were repeated.

Embodiment 3

[0027] (1) Put 0.7g ferrous sulfate (FeSO 4 ·7H 2 O) dissolved in 50mL deionized water (filled with high-purity N 2 To remove dissolved oxygen), add 0.5g coconut shell powdered activated carbon, stir vigorously at 25°C for 30min, then quickly add 1mL of 5M ammonia water, stir vigorously for 5min to obtain suspension A;

[0028] (2) According to Fe 2+ / OH - / Mn 7+ Quickly add 0.25M potassium permanganate solution dropwise into the suspension A at a molar ratio of 4.5:9:1, and stir vigorously to make it evenly mixed, and age it hydrothermally at 25°C for 12 hours to obtain the brown-black product B ;

[0029] Steps (3) and (4) in Example 1 were repeated.

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Abstract

The invention relates to a preparation method of a Fe3O4@MnO2 / active carbon magnetic compound adsorption material. The material is powdery; Fe3O4@MnO2 nuclear shell magnetic grains (with the size of 50-100 nm) are loaded on the surface of active carbon in a combining manner; and the size of the grains is 200-300 meshes. On one hand, the magnetic compound adsorption material provided by the invention can adsorb trace SMZ (Sulfamethoxazole) in water on the surface of the magnetic compound adsorption material through the specific strong adsorption effect of the powdery active carbon grains; and meanwhile, the Fe3O4@MnO2 nuclear shell magnetic grains can carry out non-biological degradation on the enriched SMZ, and on the other hand, the magnetic adsorption of the Fe3O4@MnO2 nuclear shell magnetic grains on the surface and in micro-pores is utilized and the magnetic compound adsorption material can be recycled through magnetic separation. The preparation method disclosed by the invention has the advantages of simple synthesis method, cheap synthesis materials, good stability, good adsorption effect and the like.

Description

technical field [0001] The invention is used in the application field of water treatment technology, and specifically relates to a Fe 3 o 4 MnO 2 The preparation method of activated carbon magnetic composite adsorption material. Background technique [0002] Recent studies have reported that environmental drugs such as antibiotics, anticonvulsants and antidepressants, antipyretics and non-steroidal anti-inflammatory drugs, blood lipid regulators, and β-blockers have been detected in source water and drinking water, and their concentrations are generally ng · L -1 Level. The current research results show that the pollution of drinking water by environmental drugs is not serious, but if the groundwater source is polluted, or people often drink water containing a variety of low-dose environmental drugs, people's health may be affected. Environmental drugs with high frequency in source water and drinking water show certain persistence in the process of feed water treatment,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 万俊力邓慧萍史俊周丽苏桐张翀
Owner TONGJI UNIV
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