Beta-cyclodextrin compound, preparation method thereof, and application thereof in water treatment

A technology of cyclodextrin and compound, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of low surface area and poor adsorption performance, and achieve a wide range of uses, no performance loss

Pending Publication Date: 2017-04-26
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

β-cyclodextrin can form host-guest complexes with pollutants, but until now cross-linked β-cyclodextri...

Method used

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  • Beta-cyclodextrin compound, preparation method thereof, and application thereof in water treatment
  • Beta-cyclodextrin compound, preparation method thereof, and application thereof in water treatment
  • Beta-cyclodextrin compound, preparation method thereof, and application thereof in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, preparation porous β-cyclodextrin polymer (P-CDP)

[0034] A. Add 0.1g of carbon nitride to 20ml of NaOH (3mol / L) aqueous solution, perform an activation reaction at 60°C for 24 hours, and filter to obtain activated carbon nitride;

[0035] B. Mix 0.200g β-cyclodextrin, 50μl cross-linking agent pentafluoropyridine and 0.300g basic compound K 2 CO 3 Add it into 8ml tetrahydrofuran (THF), pass nitrogen for 5 minutes, carry out the first substitution reaction at 85°C for 48 hours, then add activated carbon nitride, and carry out the second substitution reaction for 24 hours. The resulting orange suspension was cooled and filtered, and the solid on the filter paper was washed with 1mol / L hydrochloric acid to remove residual K 2 CO 3 , until CO 2 After the release is complete, wash the obtained solid with 10ml of deionized water, 10ml of tetrahydrofuran, and 15ml of dichloromethane in sequence, then dry the solid in a high vacuum, 77K liquid nitrogen bath f...

Embodiment 2

[0037] Embodiment 2, P-CDP adsorption bisphenol A experiment

[0038] Mix 3 mg of the β-cyclodextrin polymer P-CDP obtained in Example 1 with 3 ml of 0.1 mM bisphenol A solution, stir for 1 h, take out the mixture with a syringe, filter it with an inorganic membrane filter, and measure the sample by UV-vis ultraviolet-visible spectroscopy The residual concentration of bisphenol A in water can remove bisphenol A and 90% in water within 5 minutes.

[0039] Sonicated β-cyclodextrin complexes were soaked in ethanol, and the β-cyclodextrin complexes could be regenerated. The experiment cycled 3 times, and the polymer had no performance loss.

Embodiment 3

[0040] Embodiment 3, P-CDP adsorption trichlorophenol experiment

[0041] Mix 3 mg of the β-cyclodextrin polymer P-CDP obtained in Example 1 with 3 ml of 0.1 mM trichlorophenol solution, stir for 1 h, take out the mixture from the syringe, filter it with an inorganic membrane filter, and measure the sample by UV-vis ultraviolet-visible spectroscopy The residual concentration of trichlorophenol in water can remove 90% of trichlorophenol in water within 5 minutes.

[0042] The polymer can be regenerated by soaking the ultrasonic β-cyclodextrin complex in ethanol. The experiment cycled 3 times, and the β-cyclodextrin complex had no performance loss.

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PUM

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Abstract

The invention discloses a beta-cyclodextrin compound, a preparation method thereof, and an application thereof in water treatment. The preparation method comprises the following steps: carrying out a primary substitution reaction on beta-cyclodextrin, a cross-linking agent and an alkaline compound in a solvent in inert atmosphere, adding carbon nitride, and carrying out a secondary substitution reaction to obtain the beta-cyclodextrin compound. The prepared porous beta-cyclodextrin polymer can rapidly include multiple organic micropollutants in water, and has a larger adsorption rate constant than active carbon and a non-porous beta-cyclodextrin sorbent material. The polymer can rapidly remove the multiple organic pollutants when the water contains the multiple organic micropollutants, so the polymer has a wide application range. Additionally, the polymer can be regenerated under mild conditions multiple times without performance loss.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a β-cyclodextrin complex, a preparation method thereof and an application in water treatment. Background technique [0002] Incidents of water pollution caused by organic micropollutants, such as pesticides and pharmaceuticals, have raised concerns about the potential impact on aquatic ecosystems and human health. Activated carbon is most commonly used to remove organic pollutants in water, but activated carbon has several disadvantages, including slow adsorption of pollutants and difficulty in removing many relatively hydrophilic micropollutants. In addition, regenerating spent activated carbon requires a lot of energy (requires heating to 500-900 °C), and cannot fully restore the performance of activated carbon. [0003] The development of modern industry produces a large amount of industrial wastewater, including organic micro-pollutants and heavy metal ions. Waste...

Claims

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Application Information

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IPC IPC(8): C08B37/16B01J20/24B01J20/30C02F1/28C02F101/20C02F101/30
CPCC08B37/0012B01J20/24C02F1/286C02F2101/20C02F2101/30
Inventor 牟天成俞婷婷
Owner RENMIN UNIVERSITY OF CHINA
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