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Molecularly imprinted polymer for targeted degradation of emerging pollutants based on advanced oxidation system as well as preparation method and application of molecularly imprinted polymer

A technology of molecular imprinting and advanced oxidation, which is applied in chemical instruments and methods, water treatment of special compounds, oxidized water/sewage treatment, etc., can solve the problems of low degradation efficiency of emerging pollutants, unstable effect of activated materials, and large influence of pH value, etc. problems, to achieve broad practical application prospects, short catalytic time, and good durability

Pending Publication Date: 2022-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to address the low degradation efficiency of low-concentration emerging pollutants in water bodies, the large amount of oxidized free radicals produced in advanced oxidation systems cannot be fully utilized, and the traditional catalysts in the activation of advanced oxidation systems There are problems such as low activation efficiency, strong influence of pH value, easy to cause secondary pollution, and unstable effect of existing activation materials. The molecularly imprinted polymer MIP-AA with target recognition effect was successfully synthesized and activated advanced oxidation at room temperature. The system has achieved good results in the experiment of degrading emerging pollutants

Method used

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  • Molecularly imprinted polymer for targeted degradation of emerging pollutants based on advanced oxidation system as well as preparation method and application of molecularly imprinted polymer
  • Molecularly imprinted polymer for targeted degradation of emerging pollutants based on advanced oxidation system as well as preparation method and application of molecularly imprinted polymer
  • Molecularly imprinted polymer for targeted degradation of emerging pollutants based on advanced oxidation system as well as preparation method and application of molecularly imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing a functionalized molecularly imprinted polymer MIP-AA material applied to emerging pollutants of sulfonamides, the specific operation steps are as follows:

[0045] (1) Add 40mL of acetonitrile, 1mmoLSMX and 4mmol of acrylic acid (AA) to a 250mL Erlenmeyer flask in sequence, stir evenly and let stand for 12h for pre-assembly, then add 0.3gNH 2 - MIL-53 (Fe), 6 mmoL divinylbenzene (DVB) and 0.065 g azobisisobutyronitrile (AIBN). At the same time, nitrogen was passed through for 15 minutes to remove oxygen, and then sealed and placed in a water bath at 65° C. for 12 hours. Finally, the reacted mixture was centrifuged, washed, and dried in a vacuum oven at 80° C. for 12 hours to obtain a black powder, which was a molecularly imprinted polymer, marked as MIP-AA.

[0046] figure 1 NH prepared for Example 1 2 -X-ray crystallography (XRD) and Fourier transform infrared absorption spectrum (FTIR) of MIL-53(Fe) and MIP-AA;

[0047] figure 2 NH prepar...

Embodiment 2

[0059] This example compares NH 2 -MIL-53(Fe) and NH 2 - MIP-AA synthesized with MIL-53(Fe) as the substrate catalyzes the difference in the degradation effect of oxidant PS in degrading SMX.

[0060] (1) The preparation method of MIP-AA is the same as step (1) in Example 1;

[0061] (2) Using the MIP-AA prepared in Example 1 as a catalyst, Na 2 S 2 o 8 As the oxidant, four groups of SMX simulated organic wastewater with initial SMX concentration of 0.04mmol / L were prepared. The pH of the waste water is not adjusted, and the conical flask is used as the reactor, and four treatment groups are set up, which are: (1) only 0.6g / L NH 2 -MIL-53(Fe); (2) Add only 0.6g / L of MIP-AA; (3) Add 8mmol / L of Na 2 S 2 o 8 and 0.6g / L NH 2 -MIL-53(Fe); (4) Add 8mmol / L of Na 2 S 2 o 8 and 0.6g / L of MIP-AA. Add the above four groups of reaction solutions to the Erlenmeyer flask in turn, stir at room temperature to make the reaction uniform, place the Erlenmeyer flask in a shaker at 18...

Embodiment 3

[0066] This embodiment compares the influence of different molar ratios of oxidant and SMX (oxidant: SMX=50, 150, 200, 250, 300) on the targeted degradation reaction of MIP-AA.

[0067] (1) The preparation method of MIP-AA is the same as step (1) in Example 1;

[0068] (2) Using the MIP-AA prepared in Example 1 as a catalyst, Na 2 S 2 o 8 、H 2 o 2 As an oxidant, five groups of SMX simulated organic wastewater with an initial SMX concentration of 0.04mmol / L were prepared. The pH of the waste water is not adjusted, the conical flask is used as the reactor, and five treatment groups are set up for the reaction, which are: (1) adding 2mmol / L oxidant; (2) adding 6mmol / L oxidant; (3) adding 8mmol / L (4) add oxidant of 10mmol / L; (5) add oxidant of 12mmol / L. Add the above five groups of reaction solutions and 0.6g / L MIP-AA to the Erlenmeyer flask in turn, stir at room temperature to make the reaction uniform, place the Erlenmeyer flask on a shaker at 180rpm, and proceed at room t...

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Abstract

The invention discloses a molecularly imprinted polymer for targeted degradation of emerging pollutants based on an advanced oxidation system as well as a preparation method and application of the molecularly imprinted polymer. The preparation method comprises the following steps: adding emerging pollutants and acrylic acid into a pore-forming agent, pre-assembling, adding MOFs, divinyl benzene and azodiisobutyronitrile under a protective atmosphere, and carrying out a water bath reaction; and centrifugally separating, washing and drying the reacted mixture to obtain the molecularly imprinted polymer. The molecularly imprinted polymer disclosed by the invention can be continuously used, still has good adsorption and activation effects after being used for multiple times, and is an environment-friendly material. The method is suitable for various emerging pollutants, is good in durability, short in catalysis time and convenient to operate, has a relatively high degradation effect on the pollutants, reduces the pollutant degradation cost, and has a great application prospect in the aspect of degrading the emerging pollutants.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and specifically relates to a molecularly imprinted polymer for targeted degradation of emerging pollutants based on an advanced oxidation system, and a preparation method and application thereof. Background technique [0002] Emerging pollutants refer to pollutants that already exist in the environment, but due to their low concentration, their existence and potential hazards have only been discovered recently. In recent years, with the continuous improvement of the level of environmental analysis, emerging pollutants have been frequently detected in urban sewage, surface water, and drinking water at home and abroad. Emerging pollutants have stable chemical properties and are easy to bioaccumulate, which can cause biological endocrine imbalance, carcinogenic teratogenicity, neurotoxicity and immune diseases, etc., which pose a huge threat to human health and ecosystems, and are i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/72C08F283/00C08F220/06C08F212/36
CPCB01J20/268C02F1/725C02F1/722C02F1/285C08F283/00C02F2305/10C08F220/06C08F212/36
Inventor 万金泉陈华坚马邕文王艳闫志成谢咏昌
Owner SOUTH CHINA UNIV OF TECH
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