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Ionic skeleton structure porous adsorption material and preparation method and application thereof

A porous adsorption material and skeleton structure technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc.

Pending Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide an ionic skeleton porous material capable of efficiently removing perfluoroalkyl pollutants and heavy metal ions in water and a preparation method thereof, so as to overcome the problems existing in the treatment process of perfluoroalkyl pollutants and heavy metal ions in drinking water. Therefore, a porous adsorption material containing an ionic skeleton structure has been developed. The adsorption material has the advantages of high specific surface area, large adsorption capacity, fast adsorption rate, easy recycling and simple preparation method, which makes it suitable for the treatment of pollutants in water. The field has good application prospects

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  • Ionic skeleton structure porous adsorption material and preparation method and application thereof
  • Ionic skeleton structure porous adsorption material and preparation method and application thereof
  • Ionic skeleton structure porous adsorption material and preparation method and application thereof

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preparation example Construction

[0047] The invention provides a preparation method of a porous adsorbent material with an anionic or cationic skeleton structure with simple process and good adsorption effect. Since the porous adsorbent material has an ionic skeleton structure, the porous adsorbent material with an ionic skeleton structure is The adsorption capacity of perfluoroalkyl substances and heavy metal ion pollutants in water is relatively high, the process steps of this method are simple and controllable, and the secondary pollution is less, so it can be effectively put into engineering applications.

[0048]The preparation method of the porous adsorption material with anion skeleton structure among the present invention, comprises the following steps:

[0049] Step 1.1: Dissolve adenine, zinc acetate and biphenyl dicarboxylic acid in reaction solvent A to obtain mixed solution A1, wherein the molar ratio of adenine, zinc acetate and biphenyl dicarboxylic acid is 1:3:2, and reaction solvent A is N, N...

Embodiment 1

[0068] Dissolve 0.25mmol adenine, 0.75mmol zinc acetate and 0.50mmol biphenyldicarboxylic acid in a mixed solution prepared by 27mL N,N-dimethylformamide (DMF) and 3mL water. Add 0.12mL of nitric acid into the above solution system as a catalyst, then transfer the mixed solution into a polytetrafluoroethylene reactor core to seal, and place it in a stainless steel reactor, heat the above reactor at 130°C for 3 days, centrifuge The product was collected, washed with N,N-dimethylformamide (DMF) and methanol respectively, and then dried in vacuum at 90°C for 1 day to obtain Bio-MOF-1 with an anionic framework structure.

[0069] The Bio-MOF-1 with anionic skeleton structure prepared by this embodiment was characterized, and the results are as follows:

[0070] figure 1 For the XRD pattern of Bio-MOF-1 prepared in Example 1, it can be seen that the XRD pattern of Bio-MOF-1 has a sharp diffraction peak, indicating that the crystallization property of the material is good;

[0071...

Embodiment 2

[0084]Dissolve 0.25mmol of adenine, 0.75mmol of zinc acetate and 0.50mmol of biphenyldicarboxylic acid in a mixed solution prepared by 27mL of N,N-dimethylformamide and 3mL of water. Add 0.12mL of nitric acid as a catalyst, then transfer the mixed solution into a polytetrafluoroethylene reactor core to seal, and place it in a stainless steel reactor, heat the reactor at 100°C for 3 days, and collect the product by centrifugation. And washed with N,N-dimethylformamide (DMF) and methanol, respectively, and then vacuum-dried at 80°C for 1 day to obtain Bio-MOF-1 with an anionic framework structure.

[0085] The Bio-MOF-1 with anionic skeleton structure prepared by this embodiment was tested for water treatment capacity, and the results showed that when using the Bio-MOF-1 porous adsorbent prepared above to contain PFOA, PFOS and Hg 2+ 、As 2+ 、Cd 2+ and Pb 2+ When simulated water samples such as heavy metal ions were adsorbed, Bio-MOF-1 showed a significant ability to remove po...

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Abstract

The invention discloses an ionic skeleton structure porous adsorption material and a preparation method and application thereof, and two porous material adsorbents with different ionic skeletons, namely a porous adsorption material with an anionic skeleton structure and a porous adsorption material with a cationic skeleton structure, are prepared. The porous adsorption materials with the two ionic skeleton structures can efficiently adsorb and remove perfluoroalkyl substances and heavy metal ion pollutants in water, the mainly removed perfluoroalkyl substances are perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), and the mainly removed heavy metal ions are Hg < 2 + >, As < 2 + >, Cd < 2 + > and Pb < 2 + >. Drinking water is treated by using the porous adsorbent material with the ionic skeleton structure, so that the water quality of the drinking water meets the set standards and requirements of domestic drinking water.

Description

technical field [0001] The invention belongs to the field of preparation of adsorbents for removing pollutants in water, and in particular relates to an ionic skeleton structure porous adsorption material capable of efficiently removing perfluoroalkyl pollutants and heavy metal ions in water and a preparation method thereof. Background technique [0002] According to the types of pollutants, water pollution can be divided into: organic pollution, heavy metal pollution and microbial pollution. Among the various types of organic pollutants, perfluoroalkyl substances (PFASs) are a new type of persistent organic pollutants, because of their remarkable thermal and chemical stability, high surface activity, bioaccumulation, high toxicity and difficulty Characteristics such as degradation have always been difficult problems in wastewater treatment. At present, a large number of drinking water sources have been polluted by PFASs to varying degrees. Since the traditional purificati...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/36C02F101/20
CPCB01J20/226B01J20/28054C02F1/285C02F2101/36C02F2101/20
Inventor 张文祥何松洁马和平
Owner XI AN JIAOTONG UNIV
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