Dynamic covalent imine gel adsorbent and method for adsorbing phenolic compounds in water

A technology for phenolic compounds and amine compounds, which is applied in the synthesis field of functionalized gel adsorbents, can solve the problems of large floor space, low catalytic efficiency, solvent loss, etc., and achieves low recovery cost, simple material preparation process, The effect of stable adsorption performance

Active Publication Date: 2019-01-15
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (publication number CN 107986370 A) discloses a kind of decyl acetate as the main extractant, dodecane as the secondary extractant, and is formulated into a composite extractant according to a certain ratio to remove various phenols in phenol-containing wastewater. This removal method is simple to operate and the extractant is non-corrosive, but the disadvantage of this method is that there is solvent loss and secondary pollution
Chinese patent (publication number CN 103864197A) discloses a reaction pool with specific devices such as photocatalysis to degrade phenolic wastewater. This method enhances the degradation efficiency of harmful toxic substances and organic matter in wastewater, and improves the treatment effect of wastewater. , but this method requires a specific device, occupies a large area, and has low catalytic efficiency

Method used

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  • Dynamic covalent imine gel adsorbent and method for adsorbing phenolic compounds in water
  • Dynamic covalent imine gel adsorbent and method for adsorbing phenolic compounds in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the preparation of adsorption material:

[0029] (1) Take 22.5mg of tetra-(4-anilino)methane, add 2ml H 2 O, dissolve 750 μl glacial acetic acid, at room temperature, slowly add 60 μl glyoxal, stir for 1-3 minutes, place in an oven at 80°C for 3 days to form a gel, cool to room temperature, soak in THF for 3 days, change the solvent every other day .

[0030] (2) Under the protection of Ar gas, take 0.118mmol of the wet gel into a 100ml double-necked round bottom flask, add 2ml of chloromethyl ether and 3ml of THF, stir and react for 80h under condensing and reflux conditions at 40°C, wash with acetone, and prepare with absolute ethanol. Solvent exchange, centrifugation to remove the supernatant, and dry the precipitated subcritical CO2 to obtain an aerogel.

Embodiment 2

[0031] Embodiment 2: The test of adsorbent to the adsorption performance of bisphenol A:

[0032] Add 10 mg of adsorbent to 100 mL of bisphenol A solution with an initial concentration of 100 mg / L, control the temperature at 25 ° C, and shake at a speed of 200 rpm. The curve shows that the adsorption capacity of the solution is 90mg / g.

Embodiment 3

[0033] Embodiment 3: the test of adsorbent to 1-naphthol adsorption performance

[0034] Add 10mg of adsorbent to 100mL of 1-naphthol solution with an initial concentration of 100mg / L, control the temperature at 25°C, and shake at a speed of 200rpm. After shaking for 10h, take a sample to measure the absorption value of the solution with a UV-visible spectrophotometer, and bring it into Standard curve, the adsorption capacity that draws solution is 80mg / g.

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Abstract

The invention discloses a dynamic covalent imine gel adsorbent and a method for adsorbing phenolic compounds in water, an aerogel with stable structural properties is prepared by synthesis and modification of a dynamic covalent imine gel, and the aerogel with the stable structural properties acts as an adsorbent to adsorb the phenolic compounds such as bisphenol A and 1-naphthol in wastewater. Experimental results show that the adsorption capacity of the aerogel with the stable structural properties is significantly higher than the maximal adsorption capacity of carbon nanotubes, functional chitosan, a graphene oxide, cellulose porous microspheres and other adsorption materials for the phenolic compounds. The method has the advantages such as simple material preparation process, stable adsorption performance, reusability and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of synthesis of functionalized gel adsorbents, and in particular relates to an adsorption material for adsorbing phenolic compounds in water, a preparation method and application thereof. Background technique [0002] Phenols are highly toxic substances. Phenolic compounds can inactivate cell tissues in vivo, and proteins can coagulate to form insoluble proteins after being attacked by phenolic compounds. Phenolic compounds are particularly damaging to the nervous system, which can induce pathological changes in the nervous system. [0003] The current technologies for removing phenolic compounds from wastewater include extraction, biological treatment, photocatalytic degradation, adsorption and other processes. Chinese patent (publication number CN 107986370 A) discloses a kind of decyl acetate as the main extractant, dodecane as the secondary extractant, and is formulated into a composite extractant accor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/34
CPCB01J20/22B01J20/28047C02F1/285C02F2101/345C02F2303/16Y02C20/40
Inventor 杨祖金甘翠张建勇纪红兵
Owner SUN YAT SEN UNIV
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