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Preparation method and application of a cationic dye composite adsorption material

A technology of composite adsorption material and cationic dye, applied in the field of preparation of cationic dye composite adsorption material, can solve the problems of limited practical application value, high regeneration cost, high price, etc. Effect

Inactive Publication Date: 2020-03-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, activated carbon is the most widely used adsorbent, but its high price and high regeneration cost limit its practical application value.

Method used

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  • Preparation method and application of a cationic dye composite adsorption material
  • Preparation method and application of a cationic dye composite adsorption material
  • Preparation method and application of a cationic dye composite adsorption material

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preparation example Construction

[0022] The invention provides a preparation method of a cationic dye composite adsorption material, which is mainly used for synthesizing poly(acrylic acid-acrylamide) / montmorillonite composite hydrogel, and is applied to remove cationic dyes in sewage. The steps of the preparation method are:

[0023] Use sodium hydroxide solution to partially neutralize acrylic acid, then dissolve N,N'-methylenebisacrylamide in the acrylic acid solution, and then add acrylamide, montmorillonite, ammonium persulfate (APS) and Sodium bisulfite (SHS), diluted with water to obtain a mixture, and then put the mixture in a water bath at 30-70°C for 60-120 minutes to obtain a hydrogel, freeze-dry the hydrogel, and dry to obtain the composite adsorption of the cationic dye Material.

[0024] Among them, the degree of neutralization of the acrylic acid monomer is in the range of 0-100, and the best degree of neutralization is 80%.

[0025] During the preparation process, the degree of polymerizatio...

Embodiment 1

[0028] A kind of preparation method of cationic dye composite adsorption material

[0029] First, 8 g of acrylic acid monomers were partially neutralized to 80% with 10 mol / L sodium hydroxide solution, and then 0.08 g of N,N'-methylenebisacrylamide was dissolved therein. Weigh 2 grams of acrylamide monomer, add an appropriate amount of montmorillonite, add 0.06 grams of APS and 0.06 grams of SHS into the mixture, and finally dilute the solution to 50ml with water, stir the mixture evenly and react it in a water bath at 50°C 2 hours. After the polymerization reaction is completed, the hydrogel is chopped and dried in a freeze dryer for 24 hours, and then stored in an oven at 50°C.

Embodiment 2

[0031] A kind of preparation method of cationic dye composite adsorption material

[0032] First, 8 g of acrylic acid monomer was partially neutralized to 80% with 10 mol / L sodium hydroxide solution, and then 0.06 g of N,N'-methylenebisacrylamide was dissolved therein. Weigh 2g of acrylamide monomer, 0.2g of montmorillonite, 0.06g of APS and 0.06g of SHS into the mixture, and finally dilute the solution to 50ml with water. After stirring evenly, let the mixture react in a water bath at 70°C for 1 hour . After the polymerization reaction is completed, the hydrogel is chopped and dried in a freeze dryer for 24 hours, and then stored in an oven at 50°C.

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Abstract

The invention discloses a preparation method of a cationic-dye composite adsorbing material and application. The preparation method comprises the following steps of: adopting partially-neutralized acrylic acid and acrylamide as functional monomers, adopting montmorillonite as a filling agent, adopting N,N' methylene bisacrylamide as a crosslinking agent, adopting ammonium persulfate as an initiator, adopting sodium hydrogen sulfite as a coagulant aid, and adopting water as a medium, synthesizing into poly(acrylic acrylamide) / montmorillonite composite hydrogel by free-radical polymerization, i.e., the cationic-dye composite adsorbing material. The composite adsorbing material has the beneficial effect that the cationic dyes such as methylene blue can be effectively adsorbed to achieve thepurpose of reasonably treating sewage; the preparation method is simple in synthesis process, controllable in material cost, convenient in solid-liquid separation and wide in application range, is a method with a wide application prospect and can meet the need of sewage treatment with rapid development.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method and application of a cationic dye composite adsorption material. [0002] technical background [0003] Cationic dyes are widely used in textile, paper, leather, food, cosmetics, plastics and other fields. A large amount of untreated dye wastewater is directly discharged into natural water bodies every year. Dye wastewater has the characteristics of high organic matter content, high chroma, complex composition, and biodegradability, and is widely regarded as one of the difficult industrial wastewaters to treat. Even if a small amount of dye wastewater is discharged into the water body, the light transmittance of the water body will be greatly reduced, thereby slowing down the photosynthesis of aquatic plants. In addition, some dyes or their metabolites are biologically toxic, even carcinogenic and mutagenic, posing a huge threat to human health. [0004] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/56C08F222/38C08K3/34B01J20/12B01J20/26B01J20/28B01J20/30
CPCB01J20/12B01J20/26B01J20/28047C08F220/06C08K3/346C08F220/56C08F222/385
Inventor 许小平魏聪聪欧敏锐祝令辉谷俊杰
Owner FUZHOU UNIV
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