A preparation method of a material with dual functions of adsorption and flocculation

A dual-functional material, flocculation technology, applied in chemical instruments and methods, adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low adsorption capacity, poor flocculation effect, and low adsorption efficiency, etc. To achieve the effect of simple operation process

Active Publication Date: 2020-07-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These flocculants have different deficiencies and disadvantages, such as poor flocculation effect, not easy to biodegrade, easy to cause secondary pollution, etc.
Adsorbents also have the problems of difficult adsorption, low adsorption capacity, and low adsorption efficiency. Therefore, it becomes more difficult for traditional single flocculants or adsorbents to treat wastewater.
[0003] However, how to make the prepared material have high adsorption efficiency, adsorption capacity, and dual-functionality with better flocculation effect is difficult; in addition, it is also worth considering which raw material to choose, and this raw material must have some specific properties. Features, such as: cheap, green and safe, easy to biodegrade, non-toxic and harmless, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Dissolve 80 g of anhydrous sodium acetate in water, add 8 mL of glacial acetic acid, dilute to 500 mL, and form an acetic acid-sodium acetate buffer solution with a pH of about 4.5.

[0025] 2) Dissolve 1.5 g of cellulose in 55 mL of acetic acid-sodium acetate buffer solution to make a suspension, and keep it sealed.

[0026] 3) Add 2.5 g of sodium periodate to the suspension obtained in 2) in the dark, and oxidize it in a water bath at 50 °C for 3 h in the dark, then add 10 mL of ethylene glycol and react for 30 min.

[0027] 4) Put 10 mL of sodium hypochlorite and sodium bromide 1:1 mixed solution into the syringe and add the solution in 3) dropwise under gravity until 10 mL of the mixed solution is added, then oxidize for 1 h, and then put the above solution at 8000 r Centrifuge at 1 / min, wash the obtained precipitate three times with an aqueous ethanol solution with a volume ratio of 3:1, and place the obtained precipitate in a plastic petri dish for freeze-dryin...

Embodiment 2

[0031] 1) Dissolve 90 g of anhydrous sodium acetate in water, add 9 mL of glacial acetic acid, dilute to 550 mL, and form an acetic acid-sodium acetate buffer solution with a pH of about 5.0.

[0032] 2) Dissolve 1.8 g of cellulose in 58 mL of acetic acid-sodium acetate buffer solution to make a suspension, and keep it sealed.

[0033] 3) Add 2.8 g of sodium periodate to the suspension obtained in 2) in the dark, and oxidize it in a water bath at 55 °C for 3 hours in the dark, then add 15 mL of ethylene glycol and react for 40 minutes.

[0034] 4) Put 15 mL of sodium hypochlorite and sodium bromide 1:1 mixed solution into the syringe and add the solution in 3) dropwise under gravity until 15 mL of the mixed solution is added, then oxidize for 2 h, and then put the above solution at 8000 r Centrifuge at 1 / min, wash the obtained precipitate three times with an aqueous ethanol solution with a volume ratio of 3:1, and place the obtained precipitate in a plastic petri dish for free...

Embodiment 3

[0038] 1) Dissolve 100 g of anhydrous sodium acetate in water, add 10 mL of glacial acetic acid, dilute to 600 mL, and form an acetic acid-sodium acetate buffer solution with a pH of about 5.5.

[0039] 2) Dissolve 2.0 g of cellulose in 60 mL of acetic acid-sodium acetate buffer solution to make a suspension, and keep it sealed.

[0040] 3) Add 3.0 g of sodium periodate to the suspension obtained in 2) in the dark, and oxidize it in a water bath at 60 °C for 4 h in the dark, then add 20 mL of ethylene glycol and react for 50 min.

[0041] 4) Put 20 mL of sodium hypochlorite and sodium bromide 1:1 mixed solution into the syringe and add the solution in 3) dropwise under the condition of gravity until 20 mL of the mixed solution is added, then oxidize for 3 h, and then put the above solution at 8000 r Centrifuge at 1 / min, wash the obtained precipitate three times with an aqueous ethanol solution with a volume ratio of 3:1, and place the obtained precipitate in a plastic petri di...

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PUM

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Abstract

The invention relates to the field of wastewater treatment agents and discloses a method for preparing an adsorption-flocculation dual-function material. The method comprises the following steps: by taking a waste cellulose resource as a raw material, performing liquid mixing oxidation treatment with sodium periodate and hydrogen peroxide, and performing Schiff base reaction to graft polyethyleneimine and acrylamide, thereby obtaining a novel cellulose-based adsorption-flocculation dual-function material. The functional material prepared according to the method has the potential of achieving metal ion adsorption and flocculation treatment on a kaolin suspension, meanwhile by adopting the method, a water resource cannot be remarkably affected in later experiment process, scientificity of experiment results cannot be affected, and the experiment operation process is simple, non-toxic, harmless, and environmentally friendly.

Description

technical field [0001] The invention relates to the field of wastewater treatment agents, in particular to a preparation method of a material with dual functions of adsorption and flocculation. Background technique [0002] With the rapid development of the economy, the harm caused by water pollution is becoming more and more obvious, and the water body pollutants are very complex, and the wastewater composition is complex, including soluble pollutants and insoluble pollutants. The existence of these pollutants in the water body makes the water body Purification becomes particularly difficult and the current traditional flocculants mainly include inorganic flocculants, organic flocculants and microbial flocculants. These flocculants have various deficiencies and disadvantages, such as poor flocculation effect, difficult biodegradation, easy to cause secondary pollution and other problems. Adsorbents also have the problems of difficult adsorption, low adsorption capacity, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F1/28B01J20/24B01J20/30
CPCB01J20/24B01J2220/4806B01J2220/4812B01J2220/4825C02F1/286C02F1/5263C02F1/56
Inventor 王秉梁军龙陈茹茹李津单心怡
Owner ZHEJIANG SCI-TECH UNIV
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