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Production method of cellulose-based hydrogel adsorber used for treating heavy metal wastewater

A hydrogel adsorbent and cellulose-based technology, which is applied in the field of preparation of cellulose-based hydrogel adsorbents, can solve the problems such as the inability to realize the recovery and reuse of cellulose-containing textile waste resources and the limited adsorption capacity of heavy metal ions. , to achieve the effect of strong heavy metal adsorption capacity, excellent hydrophilicity, efficient and rapid removal

Active Publication Date: 2019-09-24
赛普(杭州)过滤科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the cellulose-based hydrogels in the prior art, which cannot realize the recovery and reuse of cellulose-containing textile waste resources during preparation, and the adsorption capacity of heavy metal ions is limited, so it is difficult to be well applied in Problems in the treatment of heavy metal wastewater, providing a method for preparing a cellulose-based hydrogel adsorbent for heavy metal wastewater treatment, through process control, to obtain a cellulose-based hydrogel adsorbent with high adsorption performance for heavy metal ions, It realizes the recovery and reuse of cellulose-containing textile waste resources, and can efficiently and quickly remove heavy metal ions in heavy metal wastewater, achieving the dual purpose of treating waste with waste

Method used

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  • Production method of cellulose-based hydrogel adsorber used for treating heavy metal wastewater
  • Production method of cellulose-based hydrogel adsorber used for treating heavy metal wastewater
  • Production method of cellulose-based hydrogel adsorber used for treating heavy metal wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of cellulose solution: Weigh the dried cotton yarn and place it in the cellulose solution (a mixed solution of 7wt% NaOH and 12wt% urea), stir and disperse fully, and freeze at -15°C for 2 hours to obtain the cellulose solution. Cotton yarn and fiber The mass ratio of the solution solution is 1:15.

[0032] Preparation of modified solution: Add sodium hydroxide to the mixed solution of dimethyl sulfoxide, epichlorohydrin and triethylenetetramine, stir evenly to obtain a modified solution, sodium hydroxide, dimethyl sulfoxide, epoxy The mass ratio of chloropropane and triethylenetetramine is 1:50:4:4.

[0033] Preparation of gel-like polymer: Add 60g / L polyvinyl alcohol solution to the cellulose solution, mix well, then add ammonium persulfate, acrylic acid monomer and N,N-methylenebisacrylamide in sequence, at 25°C Stir and polymerize for 20 hours to obtain a gel-like polymer; the mass ratio of cellulose solution, polyvinyl alcohol solution, ammonium persul...

Embodiment 2

[0036]Preparation of cellulose solution: Weigh the dried cotton yarn and place it in the cellulose solution (a mixed solution of 7wt% NaOH and 12wt% urea), stir and disperse fully, and freeze at -15°C for 2 hours to obtain the cellulose solution. Cotton yarn and fiber The mass ratio of the solution solution is 1:15.

[0037] Preparation of modified solution: Add sodium hydroxide to the mixed solution of dimethyl sulfoxide, epichlorohydrin and triethylenetetramine, stir evenly to obtain a modified solution, sodium hydroxide, dimethyl sulfoxide, epoxy The mass ratio of chloropropane and triethylenetetramine is 1:50:4:4.

[0038] Prepare modified activated carbon: add activated carbon to 8M nitric acid solution, the mass volume ratio of activated carbon to nitric acid solution is 1g:20mL, stir at 65°C for 9h, filter and wash, then dry at 90°C to obtain oxidized activated carbon; in the obtained oxidized activated carbon Add thionyl chloride to the mixture, the mass ratio of oxid...

Embodiment 3

[0042] Preparation of cellulose solution: Weigh the dried cotton yarn and place it in a cellulose solution (a mixed solution of 5wt% NaOH and 10wt% urea), stir and disperse fully, and freeze at -20°C for 1 hour to obtain a cellulose solution. Cotton yarn and fiber The mass ratio of the solution solution is 1:10.

[0043] Preparation of modified solution: Add sodium hydroxide to the mixed solution of dimethyl sulfoxide, epichlorohydrin and triethylenetetramine, stir evenly to obtain a modified solution, sodium hydroxide, dimethyl sulfoxide, epoxy The mass ratio of chloropropane and triethylenetetramine is 1:60:5:5.

[0044] Prepare modified activated carbon: add activated carbon to 10M nitric acid solution, the mass volume ratio of activated carbon to nitric acid solution is 1g:40mL, stir at 75°C for 11h, filter and wash, then dry at 110°C to obtain oxidized activated carbon; in the obtained oxidized activated carbon Thionyl chloride was added to the mixture, the mass ratio of...

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Abstract

The invention discloses a production method of a cellulose-based hydrogel adsorber used for treating heavy metal wastewater. The production method of the cellulose-based hydrogel adsorber used for treating the heavy metal wastewater comprises the following steps of placing cotton yarn in cellulose dissolving liquid, and after stirring and dispersing are conducted, conducting freezing to obtain a cellulose solution; adding sodium hydroxide into a mixed solution of dimethyl sulfoxide, epoxy chloropropane and triethylene tetramine, and conducting stirring to obtain a modifying solution; adding a polyvinyl alcohol solution into the cellulose solution, mixing the polyvinyl alcohol solution and the cellulose solution evenly, sequentially adding ammonium persulfate, an acrylic acid monomer and N,N'-Methylenebis(2-propenamide), and conducting stirring and polymerization to obtain a gelatinous polymer; and placing the gelatinous polymer into the modifying solution, conducting soaking, carrying out a heating reaction, and washing a product, which is obtained after the reaction is completed, with alcohol and water repeatedly to obtain the cellulose-based hydrogel adsorber used for treating the heavy metal wastewater. According to the production method of the cellulose-based hydrogel adsorber used for treating the heavy metal wastewater, a large number of amino groups are introduced to the surface of the cellulose-based hydrogel adsorber which is produced by means of cellulose in the waste cotton yarn so that heavy metal ions in the heavy metal wastewater can be efficiently and fast removed, and double purposes of using waste for treating waste are achieved.

Description

technical field [0001] The invention relates to the field of adsorbents, in particular to a preparation method of a cellulose-based hydrogel adsorbent used for heavy metal wastewater treatment. Background technique [0002] Hydrogel is a polymer with a three-dimensional network structure, which can absorb a large amount of water and swell, and can continue to maintain its original structure without being dissolved after swelling. It can be used for oil-water separation, air filtration, wire wrapping materials, anti-static, Sealing materials, metal ion concentration, packaging materials, etc. However, ordinary hydrogels are easy to break under the action of external force. Cellulose-based hydrogels use cellulose as a raw material, which is low in cost and has a wide range of sources. It has excellent biological advantages, good mechanical strength, and better toughness. more advantages in industrial applications. [0003] For example, the "preparation method of a cellulose-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/24B01J20/265B01J20/28047C02F1/285C02F1/286C02F2101/20
Inventor 苏秀平
Owner 赛普(杭州)过滤科技有限公司
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