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Easily desorbed and regenerated open-chain cucurbituril-based material for treating phenolic wastewater and preparation method thereof

A technology for cucurbituril and phenol wastewater, which is applied in separation methods, filter regeneration, water/sewage treatment, etc., and can solve problems such as poor environmental adaptability, unstable product quality, and poor performance of desorption and regeneration of phenolic pollutants.

Pending Publication Date: 2021-06-08
JIANGSU NEW HORIZON ADVANCED FUNCTIONAL FIBER INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention aims to solve the existing problems in the prior art, such as poor adsorption performance of phenolic pollutants, poor mechanical properties of products, unstable product quality, narrow application range, poor regeneration and recycling performance of products caused by desorption of phenolic pollutants, etc. The technical problem is to provide an easily desorbed and regenerated open-chain cucurbit urea-based material for treating phenol-containing wastewater and its preparation method, which can endow the nanofiber membrane with a unique molecular recognition ability, so that it can be applied in the field of adsorption and separation of phenolic substances
This method solves many problems in the process of material separation, adsorption and desorption of nanofibrous membranes, such as poor environmental adaptability, low adsorption capacity, low selectivity of phenolic pollutants, and poor performance of desorption and regeneration of phenolic pollutants. The procedure is simple, the conditions are mild, and it has promotion value

Method used

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  • Easily desorbed and regenerated open-chain cucurbituril-based material for treating phenolic wastewater and preparation method thereof
  • Easily desorbed and regenerated open-chain cucurbituril-based material for treating phenolic wastewater and preparation method thereof
  • Easily desorbed and regenerated open-chain cucurbituril-based material for treating phenolic wastewater and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] A method for preparing an easily desorbed and regenerated open-chain cucurbituril-based material for treating phenol-containing wastewater, specifically as follows:

[0061] (1) Preparation of cross-linked polyvinyl alcohol electrospun nanofiber membrane:

[0062] (1.1) Dissolving polyvinyl alcohol in deionized water, heating to 90°C and mixing under constant temperature conditions to obtain a homogeneous solution with a mass fraction of 10%;

[0063] (1.2) Add glutaraldehyde into the homogeneous solution, and stir for 0.5h to obtain spinning solution; wherein, the mass ratio of polyvinyl alcohol to glutaraldehyde is 4:1;

[0064] (1.3) Use a constant flow syringe pump to deliver the spinning solution at a flow rate of 0.5mL h -1 Transport the polymer solution, set the voltage to 13kV, use the aluminum foil as the receiving screen, the receiving distance between the needle and the aluminum foil is 15cm, and the inner diameter of the flat needle is 0.7mm; electrospinnin...

Embodiment 2

[0077] A method for preparing an easily desorbed and regenerated open-chain cucurbituril-based material for treating phenol-containing wastewater, specifically as follows:

[0078] (1) Preparation of cross-linked polyvinyl alcohol electrospun nanofiber membrane:

[0079] (1.1) Dissolving polyvinyl alcohol in deionized water, heating to 85°C and mixing under constant temperature conditions to obtain a homogeneous solution with a mass fraction of 8%;

[0080] (1.2) Add glutaraldehyde into the homogeneous solution, and stir for 0.5h to obtain spinning solution; wherein, the mass ratio of polyvinyl alcohol to glutaraldehyde is 2:1;

[0081] (1.3) Use a constant flow syringe pump to deliver the spinning solution at a flow rate of 0.3mL h -1 Transport the polymer solution, set the voltage to 10kV, use the aluminum foil as the receiving screen, the receiving distance between the needle and the aluminum foil is 15cm, and the inner diameter of the flat needle is 0.7mm; electrospin und...

Embodiment 3

[0090] A method for preparing an easily desorbed and regenerated open-chain cucurbituril-based material for treating phenol-containing wastewater, specifically as follows:

[0091] (1) Preparation of cross-linked polyvinyl alcohol electrospun nanofiber membrane:

[0092] (1.1) Dissolving polyvinyl alcohol in deionized water, heating to 89°C and mixing under constant temperature conditions to obtain a homogeneous solution with a mass fraction of 15%;

[0093] (1.2) Add adipaldehyde into the homogeneous solution, and stir for 0.5h to obtain spinning solution; wherein, the mass ratio of polyvinyl alcohol to adipaldehyde is 3:1;

[0094] (1.3) Use a constant flow syringe pump to deliver the spinning solution at a flow rate of 0.4mL h -1 Transport the polymer solution, set the voltage to 14kV, use the aluminum foil as the receiving screen, the receiving distance between the needle and the aluminum foil is 15cm, and the inner diameter of the flat needle is 0.7mm; electrospinning at...

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Abstract

The invention relates to an easily desorbed and regenerated open-chain cucurbituril-based material for treating phenolic wastewater and a preparation method of the easily desorbed and regenerated open-chain cucurbituril-based material. The preparation method comprises the following steps: carrying out electrostatic spinning by taking polyvinyl alcohol and dialdehyde as main raw materials, and then performing cross-linking in a strong acid methanol solution to form a membrane; and grafting and modifying the open-chain cucurbituril to the surface of the nanofiber membrane, wherein the open-chain cucurbituril is of a structure with a carbamido repeating unit of 4. The open-chain cucurbituril-based material prepared by the method disclosed by the invention is good in mechanical property, the tensile strength is 50-80 MPa, and the elastic modulus is 2000-3000 MPa; the material has high adsorbability on phenolic substances such as phenol, p-methoxyphenol and parachlorophenol, and the maximum adsorption rate reaches 90% or above; the material is easy to desorb and regenerate, desorption can be completed through washing with benzyl alcohol and water, and the adsorption rate is still 80% or above after five times of adsorption-desorption cycles. The preparation method is efficient and practical; the material prepared by the method disclosed by the invention has good mechanical properties and high adsorbability and is easy to desorb and regenerate.

Description

technical field [0001] The invention belongs to the technical field of phenol-containing wastewater treatment, and relates to an easily desorbed and regenerated open-chain cucurbit urea-based material for treating phenol-containing wastewater and a preparation method. Background technique [0002] Water is the source of life and is closely related to human life. On the one hand, the distribution of fresh water resources in my country is unbalanced, and nearly 45% of the land is in a situation where the distribution of water resources is quite scarce; on the other hand, my country has a large population and a large demand for water resources, and the per capita share is less than 1% of the world's average level. / 4. The above-mentioned situation makes the problem of water shortage increasingly aggravated. What's more serious is that with the continuous development of industrial modernization, a large amount of pollutants are discharged into the environment, and water bodies ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/34B01J20/30C02F1/28C02F101/34
CPCB01J20/22B01J20/267B01J20/28011B01J20/3475C02F1/285C02F2101/345
Inventor 赵润韦甜
Owner JIANGSU NEW HORIZON ADVANCED FUNCTIONAL FIBER INNOVATION CENT CO LTD
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