Porous material adsorbent as well as preparation method and application thereof

A technology of porous material and adsorbent, applied in the field of adsorbent preparation

Pending Publication Date: 2021-09-14
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a porous material adsorbent and its preparation method and application, in order to overcome the difficulties existing in the treatment process of perfluoroalkyl pollutants and heavy metal ions in drinking water, the present invention has developed a Porous adsorbent material with functional groups, the adsorbent has the advantages of high specific surface area, large adsorption capacity, fast adsorption rate, easy recycling and simple preparation method, which makes it have a good application prospect in the field of pollutant treatment in water

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  • Porous material adsorbent as well as preparation method and application thereof
  • Porous material adsorbent as well as preparation method and application thereof
  • Porous material adsorbent as well as preparation method and application thereof

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preparation example Construction

[0036] The present invention provides a preparation method of ethylenediaminetetraacetic acid (EDTA) disodium modified MOF-808 porous adsorbent material with simple process and remarkable adsorption effect. By loading functional functional group carboxyl groups on MOF-808, it is used for Improve the adsorption selectivity and adsorption capacity of MOF-808 on perfluoroalkyl and heavy metal pollutants in water. The process steps of this method are simple and controllable, with less secondary pollution, and can be effectively put into industrial applications.

[0037] The preparation method of EDTA modified MOF-808 porous adsorbent material of the present invention is as follows, comprises the following steps:

[0038] Step 1: Put 1,3,5-benzenetricarboxylic acid and zirconium oxychloride octahydrate into a reaction vessel, add a reaction solvent, and react at 100-130°C for 2-3 days to obtain a mixed solution; among them, 1,3 , The molar ratio of 5-benzenetricarboxylic acid and z...

Embodiment 1

[0051] (1) Dissolve 10mmol of 1,3,5-benzenetricarboxylic acid and 30mmol of zirconium oxychloride octahydrate in a mixed solvent of 500ml formic acid and 500ml of N,N-dimethylformamide (DMF), at 130°C Heated for 2 days; the white precipitate was collected by filtration, washed with N,N-dimethylformamide (DMF), deionized water and acetone respectively; vacuum dried at room temperature for 1 day, and then vacuum dried at 150°C for 1 day to obtain MOF-808;

[0052] (2) Dissolve 0.1 g of the obtained MOF-808 in 50 mL of 0.05 M ethylenediaminetetraacetic acid (EDTA) disodium solution, heat at 50 ° C for 2 days; filter and wash with deionized water and acetone respectively; vacuum at 50 ° C Dry for 1 day to obtain MOF-808-EDTA with carboxyl functional groups;

[0053] The EDTA-modified MOF-808 porous adsorbent prepared by this embodiment is characterized, and the results are as follows:

[0054] figure 1 For the XRD patterns of MOF-808 and MOF-808-EDTA prepared in Example 1, it c...

Embodiment 2

[0068] (1) Dissolve 10mmol of 1,3,5-benzenetricarboxylic acid and 30mmol of zirconium oxychloride octahydrate in a mixed solvent of 500ml formic acid and 500ml of N,N-dimethylformamide (DMF), at 120°C Heated for 2 days; the white precipitate was collected by filtration, washed with N,N-dimethylformamide (DMF), deionized water and acetone respectively; vacuum-dried at room temperature for 1 day, and then vacuum-dried at 130°C for 1 day to obtain MOF-808;

[0069] (2) Dissolve 0.1 g of the obtained MOF-808 in 50 mL of 0.1 M ethylenediaminetetraacetic acid (EDTA) disodium solution, heat at 65 °C for 1 day; filter and wash with deionized water and acetone respectively; vacuum at 65 °C Dry for 1 day to obtain MOF-808-EDTA with carboxyl functional groups;

[0070] The MOF-808-EDTA porous adsorbent prepared by this embodiment was used in water treatment experiments, and the results showed that when the concentration of PFOA and PFOS in the water sample was 200ng / L, the MOF-808-EDTA ...

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Abstract

The invention discloses a porous material adsorbent and a preparation method and application thereof. The preparation method comprises the steps of dissolving 1,3,5-benzenetricarboxylic acid and zirconium oxychloride octahydrate in a mixed solvent of formic acid and N,N-dimethylformamide (DMF), conducting heating to obtain white precipitate, and conducting washing to obtain a porous material; and dissolving the porous material into an ethylene diamine tetraacetic acid (EDTA) disodium solution, and conducting heating, filtering and washing to obtain the EDTA modified MOF-808 with the carboxyl functional group. The MOF-808-EDTA porous adsorbent disclosed by the invention can be used for efficiently removing perfluoroalkyl substances in water, wherein the perfluoroalkyl substances mainly comprise perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). Meanwhile, heavy metal ion pollutants, mainly heavy metal ions such as Hg<2+>, As<2+>, Cd<2+> and Pb<2+>, in water can be efficiently removed, so that the water quality of drinking water meets the set standard and requirement 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 a porous 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 purification process of waterworks cannot effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/36C02F101/20
CPCB01J20/226B01J20/22B01J20/28054C02F1/285C02F2101/36C02F2101/20
Inventor 张文祥马和平何松洁
Owner XI AN JIAOTONG UNIV
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