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Preparation of polysaccharide-base hydrogel and application of polysaccharide-base hydrogel as adsorbent to waste water treatment

A hydrogel and polysaccharide technology, which is applied in the fields of adsorption water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of application limitation, small adsorption capacity, low selectivity, etc. The effect of abundant reserves, enhanced swelling performance and good adsorption capacity

Inactive Publication Date: 2016-08-31
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the polysaccharide adsorbent is used directly, its application in wastewater treatment is limited due to its small adsorption capacity and low selectivity.

Method used

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  • Preparation of polysaccharide-base hydrogel and application of polysaccharide-base hydrogel as adsorbent to waste water treatment
  • Preparation of polysaccharide-base hydrogel and application of polysaccharide-base hydrogel as adsorbent to waste water treatment
  • Preparation of polysaccharide-base hydrogel and application of polysaccharide-base hydrogel as adsorbent to waste water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 0.75g carboxymethylcellulose sodium (CMCNa) in 30mL deionized water; dissolve 0.25g chitosan (CTS) in 10mL0.1% acetic acid aqueous solution, after the dissolution is complete, slowly mix the two solutions and transfer them into 100mL three-port In the flask, stir magnetically at 30°C to make it evenly mixed; then add 10mL acrylic acid (AA), 3.2g polyethylene glycol (PEG), 0.1g N,N '-methylenebisacrylamide (MBA), 0.1 g ammonium persulfate (APS), N 2 After reacting at 60°C for 3 hours under protection, the temperature was raised to 90°C for 10 minutes to produce a gel; the product was cooled to room temperature, taken out and cut into pieces, neutralized with NaOH solution to make the neutralization degree reach 60%, and then deionized Wash with water, dehydrate with ethanol, dry in a vacuum oven at 40°C until constant weight, and grind to obtain CMC / CTS / AA / PEG hydrogel.

[0034] The swelling property of the hydrogel is 499g / g, and the adsorption capacity for me...

Embodiment 2

[0036] Dissolve 0.75g carboxymethylcellulose sodium (CMCNa) in 30mL deionized water, and 0.25g chitosan (CTS) in 10mL 0.1% acetic acid solution. After the dissolution is complete, slowly mix the two solutions and transfer them to a 100mL three-neck flask , stir magnetically at 30°C to make it evenly mixed. Then add 10 mL of acrylic acid (AA), 1.5 g of β-cyclodextrin (β-CD), 0.1 g N,N '-methylenebisacrylamide (MBA), 0.1 g ammonium persulfate (APS), N 2After reacting at 60°C for 3 hours under protection, the temperature was raised to 90°C for 10 minutes to produce gel. After the product was cooled to room temperature, it was taken out and cut into pieces, neutralized with NaOH solution to make the neutralization degree reach 60%, then washed with deionized water, dehydrated with ethanol, dried in a vacuum oven at 40°C to constant weight, and ground The CMC / CTS / AA / β-CD hydrogel was obtained.

[0037] The swelling property of the hydrogel is 640g / g, and the adsorption capacity ...

Embodiment 3

[0039] Dissolve 0.75g carboxymethylcellulose sodium (CMCNa) in 30mL deionized water, and 0.25g chitosan (CTS) in 10mL 0.1% acetic acid solution. After the dissolution is complete, slowly mix the two solutions and transfer them to a 100mL three-neck flask , stir magnetically at 30°C to mix evenly; then add 10mL acrylic acid (AA), 4g 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 0.1g N,N '-methylenebisacrylamide (MBA), 0.1 g ammonium persulfate (APS), N 2 After reacting at 60°C for 3 hours under protection, the temperature was raised to 90°C for 10 minutes to produce gel. After the product was cooled to room temperature, it was taken out and cut into pieces, neutralized with NaOH solution to make the neutralization degree reach 60%, then washed with deionized water, dehydrated with ethanol, dried in a vacuum oven at 40°C to constant weight, and ground The CMC / CTS / AA / AMPS hydrogel is obtained.

[0040] The swelling property of the hydrogel is 759g / g, and the adsorption capa...

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Abstract

The invention discloses a preparation method of polysaccharide-base hydrogel. Cellulose and chitosan are used as base bodies; under the effects of a crosslinking agent and an initiator, the polysaccharide-base hydrogel is obtained by using the cellulose and the chitosan as the base bodies through in-situ polymerization and functional monomer copolymerization. In the copolymer, some active functional groups (such as carboxy groups, mesidino, hydroxyl groups and sulfonic groups) are introduced onto the surface of cellulose and chitosan, so that the self swelling performance and the ion exchange capability of the self are enhanced; good adsorption capability is realized on the cation dye in the waste water. In addition, the raw material reserves are rich; the regeneration performance is realized; the biological degradability and the biocompatibility are realized; good application prospects are realized in cation dye waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a method for preparing a polysaccharide-based hydrogel, in particular to a method for preparing a polysaccharide-based hydrogel copolymerized with functional monomers such as carboxymethyl cellulose, chitosan and acrylic acid; The invention also relates to the adsorption performance of the polysaccharide-based hydrogel and its application in treating methylene blue dye wastewater. Background technique [0002] In recent years, with the rapid development of industry and agriculture, groundwater has been seriously polluted, which has posed a serious threat to human survival. Dye wastewater mainly comes from textile, printing and dyeing, pulp and other industries, and it has become the most difficult wastewater to treat because of its high toxicity and large discharge. The discharge of dye wastewater will affect the circulation of the food chain and aquatic organisms, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/28047C02F1/286
Inventor 杨武郭昊林丹
Owner NORTHWEST NORMAL UNIVERSITY
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