Ion exchanger and preparation method and application thereof

The Na5n[NaP4V10O34]n·xH2O ion exchanger prepared by hydrothermal reaction solves the problems of low adsorption capacity, slow adsorption rate, poor acid-base resistance and radiation resistance of existing ion exchangers, and achieves the effect of efficient removal of Cs+ and Sr2+ ions.

CN119456056BActive Publication Date: 2025-03-28TIANJIN NORMAL UNIVERSITY
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Patent Information

Application Number
CN202510050292.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-13
Publication Date
2025-03-28
Estimated Expiration
2045-01-13

AI Technical Summary

Technical Problem

When adsorbing Cs+ and Sr2+ ions, existing ion exchangers have problems such as low adsorption capacity, slow adsorption rate, poor acid and alkali resistance and radiation resistance, which limits their application in the field of radioactive waste disposal.

Method used

By dissolving V2O5, Na2HPO4·10H2O and alkaline substances in distilled water, adding acidic substances to adjust to weak acidity, and carrying out hydrothermal reactions to prepare an ion exchanger with a structure of Na5n[NaP4V10O34]n·xH2O.

Benefits of technology

The ion exchanger has a high adsorption rate and adsorption amount, can maintain stability in an environment with pH=3-12, and the removal rate during adsorption equilibrium reaches more than 97%, and is suitable for treating high radioactive nuclear waste liquid containing Cs+ and Sr2+.

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Abstract

The invention discloses an ion exchanger and a preparation method and application thereof, belonging to the technical field of nuclear wastewater treatment. The preparation of the ion exchanger is as follows: V2O5, Na2HPO4·10H2O and alkaline substances are dissolved in distilled water to form a reaction solution, an acidic substance is added to the reaction solution to adjust the reaction solution to be weakly acidic, and then a hydrothermal reaction is performed to obtain the ion exchanger. The preparation process of the ion exchanger in the invention does not involve the use of precious metals, and the cost is low; in the synthesis process, an alkaline substance is first used to promote the hydrolysis of vanadium pentoxide to form a soluble vanadate; then an acidic substance is used to promote the acidification of the reaction system, thereby accelerating the aggregation of vanadate anions into clusters, which is beneficial to improving the yield of the ion exchanger, and there is no by-product in the entire reaction process.
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