Method for removing oxygen-anions of iodine from liquids using zirconium-based metal-organic frameworks and regeneration thereof

CN119630481APending Publication Date: 2025-03-14ELECTRIC POWER RES INST INC
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Patent Information

Application Number
CN202380042290.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-03-24
Filing Date
2023-03-23
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

The prior art is difficult to efficiently remove iodine substances from water and liquid streams, especially in the presence of competitive anionic impurities, and the commonly used materials have slow kinetics or large sorbent doses.

Method used

Using a zirconium-based metal-organic framework (MOF, such as MOF-808) as an adsorbent, efficient iodine substance removal is achieved through its high iodate adsorption capacity and stable chemical and thermal properties.

Benefits of technology

MOF-808 has an abnormally high uptake capacity of iodate, about 233 mg/g, which can effectively remove iodine substances in the liquid and maintain adsorption performance during the regeneration process, solving the problems of slow kinetics and large sorption dose in the prior art.

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Abstract

The invention relates to a method for removing iodine substances from a liquid or a liquid stream. In particular, the present invention relates to the adsorption of iodine species from liquids or liquid streams using metal-organic frameworks (MOFs), such as zirconium-based MOFs, such as MOF-808. The iodine species in the liquid or liquid stream may be radioisotopes of iodine, such as 129I and 131I, which may be present as iodide I-or oxygen-anions of iodine, such as iodate IO3-, in the liquid or liquid stream. The liquid or liquid stream containing the iodine species may include a coolant stream of a nuclear power plant. The present invention also relates to methods of regenerating adsorbents such as MOFs, including zirconium-based MOFs, such as MOF-808, to remove adsorbed iodine species using pickling solutions, such as aqueous solutions of hydrochloric acid.
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Citation Information

Cited By

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