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Magnetic nano-adsorbent and preparation method thereof

A magnetic nano and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of difficult desorption regeneration, limitation, poor stability, etc. The effect of regeneration ability, excellent adsorption effect

Inactive Publication Date: 2015-12-30
HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of polydopamine-like substances in alkaline solution is poor, and it is difficult to desorb and regenerate after adsorbing dye molecules, so the practical application is limited.

Method used

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  • Magnetic nano-adsorbent and preparation method thereof
  • Magnetic nano-adsorbent and preparation method thereof
  • Magnetic nano-adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: the specific method for preparing magnetic nano-adsorption material

[0022] (1) Weigh 13.5g of ferric chloride hexahydrate and 6.95g of ferrous sulfate heptahydrate into 100ml of deionized water, dissolve under constant mechanical stirring, pass nitrogen protection during the whole process, and heat to 80 o c.

[0023] (2) After fully dissolving, add 20ml of concentrated ammonia water dropwise to the solution, and continue at 80 o C under heating reaction 3h.

[0024] (3) After the reaction, the prepared magnetic nano-ferric oxide is separated from the liquid by attracting it with a permanent magnet. Afterwards, they were washed three times with deionized water and absolute ethanol, respectively. During the cleaning process, the nanometer ferroferric oxide is separated from the liquid through the permanent magnet attraction, and then in 50 o C for 24 hours.

[0025] (4) Measure 100ml of 0.1mol / L tris (Tris) aqueous solution, and prepare 29.4ml of 0.1...

Embodiment 2~11

[0030] Embodiment 2~11: with reference to embodiment 1, change parameter, as shown in table one:

[0031] Table I:

[0032] Amount of polyethyleneimine (g) Reaction time (h) Molecular weight of polyethyleneimine (g / mol) 0.2 24 600 0.4 24 600 0.8 24 600 1.0 24 600 1.2 24 600 0.6 12 600 0.6 36 600 0.6 48 600 0.6 24 1800 0.6 24 10000

[0033] The experimental results of the present invention show that the magnetic nano-adsorbent prepared by the present invention has excellent adsorption capacity for anionic dyes, and can significantly reduce the concentration of anionic dyes in water, thereby purifying the water. The alkali resistance test shows that the magnetic nano-adsorbent has excellent stability in a strong alkaline solution, and there is basically no loss in a strong alkaline environment. At the same time, the magnetic nano-adsorbent prepared by the present invention has a good recycling effect,...

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PUM

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Abstract

The invention discloses a magnetic nano-adsorbent and a preparation method thereof. The method comprises the following steps: (1) preparing magnetic nano-ferroferric oxide through a coprecipitation method; (2) according to a certain mass proportion, adding the ferroferric oxide, dopamine and polymine into a buffer solution, stirring and reacting for a certain period of time, and after a reaction is finished, cleaning and drying to obtain the magnetic nano-adsorbent. The magnetic nano-adsorbent prepared by the method of the invention has an excellent adsorption effect for anionic dyes, and meanwhile, the magnetic nano-adsorbent has relatively higher alkali resistance and cyclic regeneration capacity. At the same time, the magnetic nano-adsorbent prepared by the invention is capable of selectively adsorbing anionic fractions in a mixed solution.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a magnetic nano-adsorption material capable of adsorbing organic dyes and a preparation method thereof. Background technique [0002] Printing and dyeing, papermaking, textile and other industries consume a large amount of organic dyes every year and discharge a large amount of dye wastewater. These dye molecules and their intermediates have extremely high water solubility and certain toxicity, and will cause great harm to the natural environment and human health after being dissolved in water. Therefore, it is very necessary to purify dye wastewater. Dopamine can self-polymerize under aerobic conditions to form polydopamine, and the formed polydopamine can be firmly bound to the surface of solid materials, and can bind and adsorb part of the dye molecules. Utilizing these characteristics of dopamine, it is compounded with magnetic nano ferric iron tetroxide to prepare a mag...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 邵路郭靖王振兴
Owner HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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