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Modified zirconium-based organic metal framework adsorbent for adsorbing lead ions as well as preparation method and application thereof

An organometallic, lead ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of lack of competition between microorganisms, difficult sediment treatment, poor reusability, etc. Achieve the effect of good selective removal rate, easy separation and no secondary pollution

Active Publication Date: 2020-02-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the sediment produced by the chemical precipitation method is difficult to handle, has poor selectivity, and will cause secondary pollution; the special microorganisms used to adsorb lead ions in the biological method exist in fewer types in the environment, and the interspecies competition of such microorganisms is not available. Advantages, short life; ion exchange method and electrochemical method are relatively high in cost and poor in reusability

Method used

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  • Modified zirconium-based organic metal framework adsorbent for adsorbing lead ions as well as preparation method and application thereof
  • Modified zirconium-based organic metal framework adsorbent for adsorbing lead ions as well as preparation method and application thereof
  • Modified zirconium-based organic metal framework adsorbent for adsorbing lead ions as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The modified zirconium-based organometallic framework adsorbent for adsorbing lead ions has a structural formula:

[0028]

[0029] The preparation method of the modified zirconium-based organic metal framework adsorbent, the steps are:

[0030] (1) First mix N,N-dimethylformamide and 2-aminoterephthalic acid evenly according to the liquid-solid ratio of 40:1mL / g, and then mix them according to the mass of 2-aminoterephthalic acid and zirconium tetrachloride Add zirconium tetrachloride at a ratio of 1:1, then add hydrochloric acid according to the volume ratio of hydrochloric acid and N,N-dimethylformamide at 1:400, react at 120°C for 20 hours, wash and centrifuge, and vacuum dry the The obtained product is marked as UiO-66-NH 2 .

[0031] (2) According to the liquid-solid ratio of 30:1mL / g, absolute ethanol and UiO-66-NH obtained in step (1) 2 Mix well, then follow glutaraldehyde solution with UiO-66-NH 2 The liquid-solid ratio is 2:1mL / g, add glutaraldehyde sol...

Embodiment 2

[0036] The modified zirconium-based organometallic framework adsorbent for adsorbing lead ions has a structural formula:

[0037]

[0038] The preparation method of the modified zirconium-based organic metal framework adsorbent, the steps are:

[0039] (1) First mix N,N-dimethylformamide and 2-aminoterephthalic acid evenly according to the liquid-solid ratio of 50:1mL / g, and then mix them according to the mass of 2-aminoterephthalic acid and zirconium tetrachloride Add zirconium tetrachloride at a ratio of 1.2:1, then add hydrochloric acid according to the volume ratio of hydrochloric acid and N,N-dimethylformamide at 1:600, react at 140°C for 30 hours, wash and centrifuge, and vacuum dry the The obtained product is marked as UiO-66-NH 2 .

[0040] (2) According to the liquid-solid ratio of 40:1mL / g, dehydrated ethanol and the UiO-66-NH obtained in step (1) 2 Mix well, then follow glutaraldehyde solution with UiO-66-NH 2 The liquid-solid ratio is 3:1mL / g, add glutaralde...

Embodiment 3

[0045] The modified zirconium-based organometallic framework adsorbent for adsorbing lead ions has a structural formula:

[0046]

[0047] The preparation method of the modified zirconium-based organic metal framework adsorbent, the steps are:

[0048] (1) First mix N,N-dimethylformamide and 2-aminoterephthalic acid evenly according to the liquid-solid ratio of 45:1mL / g, and then mix them according to the mass of 2-aminoterephthalic acid and zirconium tetrachloride Add zirconium tetrachloride at a ratio of 1.1:1, then add hydrochloric acid according to the volume ratio of hydrochloric acid and N,N-dimethylformamide at 1:500, react at 130°C for 25 hours, wash and centrifuge, and vacuum dry the The obtained product is marked as UiO-66-NH 2 .

[0049] (2) According to the liquid-solid ratio of 35:1mL / g, absolute ethanol and the UiO-66-NH obtained in step (1) 2 Mix well, then follow glutaraldehyde solution with UiO-66-NH 2 The liquid-solid ratio is 2.5:1mL / g, add glutaralde...

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Abstract

The invention discloses a modified zirconium-based organic metal framework adsorbent for adsorbing lead ions as well as a preparation method and application of the modified zirconium-based organic metal framework adsorbent. The method comprises the following steps: reacting 2-aminoterephthalic acid, zirconium tetrachloride and hydrochloric acid in N, N-dimethylformamide to obtain a product UiO-66-NH<2>, then reacting the product UiO-66-NH<2> with glutaraldehyde to obtain a product UiO-66-GD, and reacting UiO-66-GD with 6-amino-2-thiouracil to obtain the modified zirconium-based organic metal framework adsorbent UiO-66-ATA. The method is simple to operate, the preparation method is simple, raw materials and reagents are cheap and easy to obtain, the obtained metal organic framework can be compatible with various functional groups, has ultrahigh specific surface area and permanent porosity, has high selectivity and high flux adsorption effect on lead ions, a novel efficient adsorption material is provided for lead-containing sewage treatment, and a new method is provided for design and synthesis of the novel adsorption material.

Description

technical field [0001] The invention relates to a preparation method and application of a modified zirconium-based organic metal frame adsorbent for adsorbing lead ions, and belongs to the technical field of adsorbent preparation. Background technique [0002] With the development of industries such as battery manufacturing, paint application, petroleum refining, and mineral production, a large number of toxic heavy metal ions enter the water circulation system (surface water and groundwater) and may further enter organisms. Among them, lead metal is listed as a harmful pollutant that threatens human health and the ecological environment due to its high toxicity, tumorigenicity, bioaccumulation, and refractory properties, and was listed in the first batch in July 2019. List of Toxic and Hazardous Water Pollutants. Even at low levels, lead can cause irreversible damage to the human nervous, intellectual, reproductive and blood systems. At the same time, lead metal is widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/226C02F1/285C02F2101/20Y02P10/20
Inventor 薛灿纪红兵熊超王仕兴周贤太杨祖金王永庆胡鹏黄丽云
Owner SUN YAT SEN UNIV
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