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Application of MOF-808 as adsorbent in adsorption of PFOS pollutants in water body

A MOF-808, 1. MOF-808 technology, applied in the field of adsorbents, can solve the problems of low efficiency and expensive ion exchange resin materials, and achieve the effect of fast adsorption and high removal efficiency

Pending Publication Date: 2021-11-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the existing adsorbents, activated carbon is cheap but not efficient, ion exchange resin is efficient but expensive, and clay minerals must be modified to play a good role. Therefore, the above adsorbents cannot meet the requirements practical application

Method used

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  • Application of MOF-808 as adsorbent in adsorption of PFOS pollutants in water body
  • Application of MOF-808 as adsorbent in adsorption of PFOS pollutants in water body
  • Application of MOF-808 as adsorbent in adsorption of PFOS pollutants in water body

Examples

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Embodiment 1

[0047] The reaction temperature and time in Step 3 of Comparative Example 1 were changed from 48 hours at 120° C. to 7 days at 100° C., and the other steps remained unchanged to obtain a white powder material.

[0048] Use powder X-ray diffraction (PXRD) to detect the crystallinity, crystal form, and grain size of the obtained dry white powder material to evaluate the synthesis status of MOF-808.

[0049] figure 1 For the SEM collection of illustrative plates of the MOF-808 prepared in embodiment 1, figure 2 For the XRD pattern of the MOF-808 that embodiment 1 prepares, from figure 1 It can be seen that the MOF-808 prepared in Example 1 presents an octahedral shape with good crystal edges, figure 2 It can be seen that the MOF-808(Zr) prepared in Example 1 shows obvious characteristic diffraction peaks at 2θ=8.3, 8.7, 10.0 and 11.0°, and the position of the peak matched with the MOF-808(Zr) spectrum In agreement, this indicates the successful synthesis of MOF-808(Zr).

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Abstract

The invention provides an application of MOF-808 as an adsorbent in adsorption of PFOS pollutants in a water body. The research finds that anionic PFOS can be adsorbed by MOF-808, and the action principle of adsorption is that the PFOS is adsorbed by utilizing the electrostatic interaction through a positively charged [Zr-O] bond in the MOF-808, so that the PFOS can be adsorbed and removed. The MOF-808 has the excellent characteristics of high adsorption speed, high adsorption capacity and the like when being used for adsorbing environmental persistent pollutants PFOS.

Description

technical field [0001] The invention relates to an adsorbent, in particular to the application of a metal organic framework material MOF-808 as an adsorbent in adsorbing PFOS pollutants in a water body. Background technique [0002] Perfluorooctanesulfonates (PFOS) are extremely polar because the C-F bond it contains is the strongest bond among the known covalent bonds, and the bond energy is as high as 486kJ / mol, so PFOS is a perfluorooctane sulfonate. The extremely difficult to degrade substances in the compound are a kind of persistent organic pollutants (POPs). In May 2009, PFOS was added to the list of persistent organic pollutants in the Stockholm Convention on Persistent Organic Pollutants as a new class of persistent organic pollutants. But in many countries, PFOS continues to be used. Moreover, my country still has no clear restrictions on PFOS. According to the survey report of the China Fluorosilicon Materials Association, there are still several companies in Ch...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/36
CPCB01J20/226C02F1/285C02F2101/36
Inventor 张博翔陈文华钟波李纪薇郭瑾萧
Owner XI AN JIAOTONG UNIV
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