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Preparation method of spherical titanate cellulose composite aerogel capable of adsorbing radioactive ions and heavy metal ions

A technology of composite aerogel and heavy metal ions, applied in aerosol preparation, alkali metal compounds, radioactive pollutants and other directions, can solve the problems of difficult post-processing, difficult recovery, easy loss, etc. The effect of surface area

Inactive Publication Date: 2017-03-22
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because titanate nanomaterials are at the nanometer level, it is easy to lose and difficult to recycle during water treatment, and post-processing is difficult.

Method used

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  • Preparation method of spherical titanate cellulose composite aerogel capable of adsorbing radioactive ions and heavy metal ions
  • Preparation method of spherical titanate cellulose composite aerogel capable of adsorbing radioactive ions and heavy metal ions
  • Preparation method of spherical titanate cellulose composite aerogel capable of adsorbing radioactive ions and heavy metal ions

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preparation example Construction

[0026] figure 1 It is a process flow chart of a preparation method of a spherical titanate cellulose composite airgel capable of absorbing radioactive ions and heavy metal ions provided by an embodiment of the present invention. see figure 1 , including the following steps:

[0027] Step S1, adding cellulose and ionic solution to the reaction vessel for mixing, heating the mixture of cellulose and ionic solution to 40-200°C to dissolve it evenly, and obtaining a cellulose solution, wherein the fiber The mass ratio of element to the ion solution is 0.02-0.4:1;

[0028] Step S2, adding titanate nanomaterials to the cellulose solution, and stirring for 5-100 min to obtain a mixed solution, wherein the mass ratio of the titanate nanomaterials to the cellulose is 0.1-50:1 ;

[0029] Step S3, using a titration device to titrate the mixed solution into a coagulant to form beads, and solidify for 6-12 hours to obtain a spherical hydrogel, wherein the coagulant is deionized water; ...

Embodiment 1

[0050] 1. Add cellulose and ionic solution to the reaction vessel for mixing, heat the mixture of cellulose and ionic solution to 40°C to dissolve it uniformly, and obtain a cellulose solution, wherein the cellulose and the ionic solution The mass ratio of the ion solution is 1:50, and the cellulose is bamboo cellulose;

[0051] 2. Add titanate nanomaterials to the cellulose solution, and stir for 5 minutes to obtain a mixed solution, wherein the mass ratio of the titanate nanomaterials to the cellulose is 1:10, and the titanate The salt nanomaterial is a titanate nanofiber, and the agitation is achieved by mechanical agitation;

[0052] 3. Use a titration device to titrate the mixed solution into a coagulant to form beads, and solidify for 6 hours to obtain a spherical hydrogel, wherein the coagulant is deionized water, and the titration device is a rubber dropper ;

[0053] 4. Soak the spherical hydrogel in deionized water for the first replacement, and replace the deioniz...

Embodiment 2

[0058] 1. Add cellulose and ionic solution to the reaction vessel for mixing, heat the mixture of cellulose and ionic solution to 80°C to dissolve it uniformly, and obtain a cellulose solution, wherein the cellulose and the ionic solution The mass ratio of the ion solution is 1:10, and the cellulose is wood cellulose;

[0059] 2. Add titanate nanomaterials to the cellulose solution, and stir for 10 minutes to obtain a mixed solution, wherein the mass ratio of the titanate nanomaterials to the cellulose is 1:1, and the titanate The salt nanomaterial is a titanate nanotube, and the stirring is achieved by glass stirring;

[0060] 3. Use a titration device to titrate the mixed solution into a coagulant to form beads, and solidify for 8 hours to obtain a spherical hydrogel, wherein the coagulant is deionized water, and the titration device is a syringe;

[0061] 4. Soak the spherical hydrogel in deionized water for the first replacement, and replace the deionized water every 7 ho...

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Abstract

The invention belongs to the technical field of aerogel materials, and relates to a preparation method for spherical titanate cellulose composite aerogel capable of adsorbing radioactive ions and heavy metal ions. Cellulose composite aerogel in which a titanate nano material is loaded is formed by combining the titanate nano material with cellulose. According to the preparation method for the spherical titanate cellulose composite aerogel capable of adsorbing the radioactive ions and the heavy metal ions, with a large specific surface area and certain shape and appearance, the prepared spherical titanate cellulose composite aerogel can quickly capture the radioactive ions and the heavy metal ions in water, and is also favorable for solid-liquid separation to fulfill the aim of safe post-treatment. The spherical titanate cellulose composite aerogel prepared by the method internally fixes the radioactive ions such as Ra<2+>, Cs<2+> and Sr<2+> and the heavy metal ions such as Pb<2+>, Cu<2+> and Hg<2+> through ion exchange.

Description

technical field [0001] The invention relates to the technical field of airgel materials, in particular to a preparation method of spherical titanate cellulose composite airgel capable of absorbing radioactive ions and heavy metal ions. Background technique [0002] Handling of radioactive contamination requires a product suitable for long-term storage and handling. With the operation and construction of more and more nuclear power plants, nuclear waste will also increase. Therefore, advanced materials for the treatment of pollutants are urgently needed. Natural inorganic cation exchangers, such as clays and zeolites, are widely used for the removal of radioactive ions in water through ion exchange and subsequent safe disposal due to their resistance to radiation, chemical changes, and thermal changes. Synthetic inorganic cation exchangers, such as synthetic mica, γ-zirconium phosphate, niobate molecular sieves, and titanates, have been investigated for the treatment of radi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J13/00C02F1/28C02F101/20
CPCB01J20/24B01J13/0095B01J20/0211B01J20/28047B01J2220/46B01J2220/4806B01J2220/4825C02F1/28C02F1/281C02F1/286C02F2101/006C02F2101/20
Inventor 孙庆丰熊业金春德王超姚秋芳
Owner ZHEJIANG FORESTRY UNIVERSITY
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