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Method for grafting functional cellulose onto zeolite and waste water treatment method

A technology for grafting zeolite and cellulose, which is applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc. The membrane is easy to block and other problems, so that the grafting process is simple and easy to implement, large-scale application is achieved, and the pore size is increased.

Active Publication Date: 2018-02-23
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrolytic method has a long reaction time, poor removal effect on high-concentration complexed heavy metal ions, and easy clogging of the membrane. It is more urgent to develop a simple, fast, and strong removal method.

Method used

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  • Method for grafting functional cellulose onto zeolite and waste water treatment method
  • Method for grafting functional cellulose onto zeolite and waste water treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The method for grafting zeolite with functionalized cellulose of the present invention comprises the following steps:

[0050] 1) Accurately weigh 35.06g of NaCl and dissolve it in 2L of distilled water, stir and dissolve to obtain a NaCl solution with a concentration of 0.3mol / L;

[0051]2) Add 20 g of artificial zeolite that has passed through a 200-mesh sieve into the NaCl solution in step 1), heat and stir at 100°C for 3 hours, centrifuge, wash with distilled water until neutral, and dry to obtain Na-modified artificial zeolite;

[0052] 3) Take 8g of cellulose acetate I and disperse it in 400mL of methanol, then add 40g of polyethyleneimine, stir for 24 hours, mix well and then centrifuge immediately to remove excess polyethyleneimine to obtain polyethyleneimine-coated cellulose acetate II;

[0053] 4) Add the cellulose acetate II obtained in step 3) into 400 mL of distilled water, then slowly add 12 mL of 25% glutaraldehyde aqueous solution, and adjust the pH of ...

Embodiment 2

[0058] The method for grafting zeolite with functionalized cellulose of the present invention comprises the following steps:

[0059] 1) Accurately weigh 11.69g of NaCl and dissolve it in 2L of distilled water, stir and dissolve to obtain a NaCl solution with a concentration of 0.1mol / L;

[0060] 2) Add 30 g of artificial zeolite that has passed through a 200-mesh sieve into the NaCl solution in step 1), heat and stir at 120°C for 4 hours, centrifuge, wash with distilled water until neutral, and dry to obtain Na-modified artificial zeolite;

[0061] 3) Take 4g of cellulose acetate I and disperse it in 200mL of methanol, then add 20g of polyethyleneimine, stir for 48h, make it fully mixed and then centrifuge immediately to remove excess polyethyleneimine to obtain polyethyleneimine-coated cellulose acetate II;

[0062] 4) Add the cellulose acetate II obtained in step 3) into 200 mL of distilled water, then slowly add 8 mL of 25% glutaraldehyde aqueous solution, and adjust the ...

Embodiment 3

[0067] The method for grafting zeolite with functionalized cellulose of the present invention comprises the following steps:

[0068] 1) Accurately weigh 58.44g NaCl and dissolve it in 2L distilled water, stir and dissolve to obtain a NaCl solution with a concentration of 0.5mol / L;

[0069] 2) Add 40 g of artificial zeolite that has passed through a 200-mesh sieve to the NaCl solution in step 1), heat and stir at 80°C for 5 hours, centrifuge, wash with distilled water until neutral, and dry to obtain Na-modified artificial zeolite;

[0070] 3) Take 6g of cellulose acetate I and disperse it in 300mL of methanol, then add 30g of polyethyleneimine, stir for 36 hours, mix well and then centrifuge immediately to remove excess polyethyleneimine to obtain polyethyleneimine-coated cellulose acetate II;

[0071] 4) Add the cellulose acetate II obtained in step 3) into 300mL of distilled water, then slowly add 10mL of 25% glutaraldehyde aqueous solution, and adjust the pH of the mixed ...

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Abstract

The invention discloses a method for grafting functional cellulose onto zeolite and a waste water treatment method. According to the zeolite grafted with the functional cellulose, moisture and inorganic impurities in original porous channels can be removed, the porous channels of the artificial zeolite can be broadened, and the pore diameter can be increased, so that the steric hindrance is reduced, internal diffusion is accelerated, and the ion-exchange capacity is increased; by grafting the cellulose functionally modified by polyethyleneimine onto the artificial zeolite, an adsorbing agent with the surface containing a large number of carboxyl and amidogen can be obtained, wherein a large number of adsorbing functional groups are introduced. According to the method for grafting the functional cellulose onto the zeolite, the resources of the cellulose and the artificial zeolite used in the method are wide, the cellulose and the artificial zeolite are cheap and easy to obtain, the whole grafting process of the artificial zeolite is simple and easy to implement, and large-scale application can be achieved; the adsorbing agent can be directly put into an adsorption reaction for stirring, and solid-liquid separation can be achieved after standing; in industrial application, separation of heavy metal from a water body can be achieved by discharging supernatant and recycling sludge,the whole treatment process is low in cost, simple in operation, easy to implement and high in efficiency.

Description

technical field [0001] The invention relates to a method for grafting functionalized cellulose to zeolite and a method for treating wastewater, and belongs to the innovative technology of the method for grafting cellulose to zeolite and the method for treating wastewater. Background technique [0002] With the rapid development of society, the pollution of water bodies is becoming more and more serious. Fresh water resources on the earth only account for 1% of the total water volume, and water resources are scarce in many regions of the world. Water body protection and restoration have received extensive attention. [0003] Cellulose is the most abundant renewable polymer natural resource in the world, and it is estimated that 10 11 -10 12 Cellulose is synthesized, and these celluloses exist in plant cells in a combined or semi-bound form with hemicellulose and lignin. Due to the strong interaction between cellulose molecules due to the hydrogen bonding of hydroxyl groups,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/24C02F1/28C02F101/20
CPCB01J20/18B01J20/24C02F1/28C02F1/281C02F1/285C02F2101/20
Inventor 黄柱坚黄芷嫣胡新将崔理华冯丽晶胡志霖梁健铭肖敏怡
Owner SOUTH CHINA AGRI UNIV
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