In-situ remediation of uranium contamination and applications thereof

By using bio-induced hydrolysis, oxidation, and biomineralization processes of pyrite, uranium contaminants are encapsulated in iron oxide lattices, solving the problems of low efficiency, high cost, and poor stability in existing uranium contamination remediation technologies, and achieving efficient, economical, and environmentally friendly uranium contamination remediation.

CN119870136BActive Publication Date: 2026-07-07BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
Filing Date
2025-02-25
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing uranium contamination remediation technologies suffer from high processing costs, long cycles, unsustainable effects, and the potential to cause secondary pollution and significant environmental disturbances. A single technology is insufficient to meet the dual requirements of efficient removal of uranium contamination and long-term stability of the products.

Method used

Uranium contaminants are encapsulated in the reconstructed iron oxide lattice through bio-induced in-situ hydrolysis, oxidation, atomic rearrangement, and biomineralization of pyrite. The interaction between microorganisms and pyrite stimulates microorganisms to remediate uranium-contaminated areas. Combined with natural humus as an electron donor, the hydrolysis, oxidation, and biomineralization processes of pyrite are promoted.

Benefits of technology

It achieves efficient sequestration of uranium contaminants, reduces chemical toxicity and radioactive hazards, enhances microbial reactivity, improves remediation efficiency and environmental stability, avoids secondary pollution, and is cost-effective.

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Abstract

This application discloses an in-situ remediation method for uranium contamination and its application. The method involves the interaction between microorganisms and pyrite, driving pyrite hydrolysis, oxidation, atomic rearrangement, and biomineralization. This immobilizes the uranium contaminant within the iron oxide lattice of the reconstructed product, thus remediating the contaminated area. The microorganisms include one or more of Brucella, Geobacterium, or Clostridium. If the uranium-contaminated area contains microorganisms, natural humic substances are used as electron donors to stimulate the in-situ microorganisms. A natural humic substance solution is injected into the uranium-contaminated area via a circulating pumping method to stimulate the in-situ microorganisms. The concentration of the natural humic substance solution is 0.05–5 g / L, and the dosage is 5–500 g / day. This application fully considers and rationally utilizes in-situ mineral, microbial, and geochemical resources, relying on the in-situ mineral and microbial interactions to save engineering costs and achieve high remediation efficiency.
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