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Composite adsorbing material and preparation method and application thereof

An adsorption material and composite technology, applied in the field of material preparation and environmental science, can solve the problems of high technical requirements for synthesis process, high toxicity of synthetic raw materials, complex synthesis method, etc., and achieves strong operability, remarkable removal effect, and synthesis process simple effect

Pending Publication Date: 2021-04-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthetic raw materials of traditional hydrogels are highly toxic, the synthetic methods are complicated, the technical requirements for the synthetic process are high, the material strength is low, easy to dissolve, and the adsorption performance is low, which is not conducive to the wide application in actual production.

Method used

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  • Composite adsorbing material and preparation method and application thereof
  • Composite adsorbing material and preparation method and application thereof
  • Composite adsorbing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]10 g 10% polyvinyl alcohol solution, 10 g of sodium hydrate solution and 6 g of 0.5% sodium monosil water dispersion solution were mixed at 55 ° C, and mixed with a rotational speed of 100 r / min, and mixed with mixed liquid A.

[0044]Then, 10 g of 0.2% N, N'-methylene double acrylamide solution was added to the acrylic solution of 20%, forming a mixed liquid B and dripped into mixed liquid A at a speed of 3 drops / S. At the same time, 10 g of 0.4% ammonium sulfate solution 2 drops / S was dripped into mixed liquid A. After the above solution is added, the mechanical stirring lasts for 20 min, warmed to 70 ° C, and stirring for 2 h, resulting in a viscous gel material. The gel material was placed in -4 ° C for 6 h, which was subjected to thawing 6 h under room temperature conditions, and the same condition and the freezing were frozen 3 times, and then placed in a cryogenic dryer to give a composite adsorbent material.

Embodiment 2

[0046]15 g 8% polyvinyl alcohol solution, 10 g of 0.8% hydrorate solution and 8 g 1.0% calcium-monovolid water dispersion solution were mixed with 60 ° C, and mixed with a rotational speed of 125 R / min.

[0047]A 10 g of 0.3% N, N'-methylene bis acrylamide solution was added to an acrylic solution of 40 g of an acrylic solution to form a mixed liquid B and dripped into mixed liquid A at a speed of 4 drops / S. At the same time, 10 g of 0.7% potassium sulfate solution was added dropwise to the mixture A. After the above solution is added, the mechanical stirring lasts for 30 min, warmed to 70 ° C, continued to stir for 3 h, resulting in a viscous gel material. The gel material was placed in -4 ° C for 9 h, and then thawed 9 h under room temperature conditions, the same conditions and the freeze were frozen 4 times, and then lyophilized in the cryogenic dryer to obtain a composite adsorbent material.

Embodiment 3

[0049]20 g 6% polyvinyl alcohol solution, 10 g of 1.5% hydrorate solution and 10 g of 1.5% sodium monosil dispersion solution were mixed with 65 ° C, and mixed with a rotational speed of 150 r / min, and mixed with mixed liquid A.

[0050]10 g of 0.5% N, N'-methylene double acrylamide solution was added to an acrylic solution of 60 g of an acrylic solution to form a mixture B and dripped into mixed liquid A at a speed of 5 drops / S. At the same time, 10 g 1.0% of ammonium sulfate solution was added dropwise to the mixture A. After the above-mentioned solution is added, the mechanical stirring lasts for 40 min, warmed to 70 ° C, and stirring for 4 h, resulting in a viscous gel material. The gel material was prepared in -4 ° C for 12 h, which was subjected to thawing 12h under room temperature conditions, and the same conditions and the freezing were frozen 5 times, and then placed in a cryogenic dryer to obtain a composite adsorbent material.

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Abstract

The invention discloses a composite adsorbing material and a preparation method and application thereof. Active groups such as carboxyl and hydroxyl existing in polyvinyl alcohol, humic acid and acrylic acid structures and hydroxyl groups existing in montmorillonite structures are utilized to be in contact with pollutants, and hydrogen bonds, electrostatic attraction and chelation are combined, therefore, the purpose of removing pollutants is achieved. Meanwhile, a combination place is provided for adsorption of pollutants by utilizing a layered structure and a relatively large specific surface area of montmorillonite, and after freezing and unfreezing treatment is carried out for multiple times, the formation of a porous structure of the composite adsorption material is facilitated, the specific surface area of the material is increased, the subsequent improvement of the treatment performance of the pollutants is facilitated, and finally, through freeze drying, the porous structure of the material is maintained, the composite adsorbing material with the porous structure is finally obtained, the adsorbing material is environmentally friendly and can be recycled, the synthetic raw materials are low in price, the synthetic process is simple, the reaction condition requirement is low, and the operability is high.

Description

Technical field[0001]The present invention belongs to the field of material preparation and environmental science and technology, and more particularly to a composite adsorption material and a preparation method thereof and its application thereof.Background technique[0002]Conventional adsorbents such as activated carbon, zeolite, clay and agricultural waste, most of which have problems in adsorption performance, low removal rate, and can not be circulated, and do not reach actual production requirements for pollutants. Hydrogel is a material that is absolutely dissolved in water, which has removal capabilities of contaminants in water. However, the synthesis of traditional hydrogel is high, the synthesis method is complex, the synthetic process technology is high, and the material intensity is low, the adsorption performance is low, which is not conducive to the extensive application of actual production.Inventive content[0003]In order to solve the problems present in the prior art...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/24B01J20/267B01J20/12C02F1/288C02F2101/308C02F2101/20
Inventor 牛育华韩星星黄良仙王荣宋洁韩玉英陈莉君李龙
Owner SHAANXI UNIV OF SCI & TECH
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