Streptomyces varioti with arsenic oxidation function and application of Streptomyces varioti in soil remediation

By screening and isolating the variable chain algae Desmodesmus arsenicoxydans B3 with arsenic oxidation function, the problem of lack of arsenic oxidation microalgae in rice fields was solved, effective repair of arsenic contaminated soil was achieved, and the bioavailability of arsenic was reduced.

CN119823874AActive Publication Date: 2025-04-15SOUTH CHINA NORMAL UNIV +1
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Patent Information

Application Number
CN202411911805.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-04-15
Estimated Expiration
2044-12-24

AI Technical Summary

Technical Problem

The prior art has not yet screened out microalgae with arsenic oxidation function in rice field soil, resulting in poor biorepair effect of arsenic-contaminated soil.

Method used

A multi-chain algae, Desmodesmus arsenicoxydans B3, was isolated and screened. This algae strain was able to oxidize As(III) to As(V) under the condition of day-night replacement, and fix it through solid phase adsorption of soil to reduce the bioavailability of arsenic.

Benefits of technology

By using variable chain algae B3, As(III) in the soil can be effectively oxidized and converted into solid-phase adsorbed As(V), significantly reducing the concentration of As(III) and total arsenic in the soil solution, and improving the repair effect of arsenic-contaminated soil.

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Abstract

The invention belongs to the technical field of microorganisms, discloses a strain of streptomyces varioti with an arsenic oxidation function and application of the strain of streptomyces varioti in soil remediation, and particularly discloses a strain of streptomyces varioti B3. According to the invention, a strain of microalgae B3 with an arsenic oxidation function is obtained through separation, and the microalgae strain belongs to Desmodesmus and can oxidize As (III) under the condition of day and night alternation. And determining the arsenic form in the flooded soil solution by adopting a liquid chromatography-atomic fluorescence combination instrument. Arsenic form analysis shows that As (III) is oxidized into As (V), the concentration of As (III) and total arsenic in soil pore water is reduced, it is indicated that under the waterflooding condition, the streptozotoci variabilis B3 can effectively oxidize As (III), remove total arsenic in a soil solution and reduce the bioavailability of arsenic, and the streptozotoci variabilis B3 plays an important role in the aspect of repairing arsenic-polluted soil.
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Citation Information

Patent Citations

  • Bacterial strain used for arsenic polluted soil remediation and application method thereof

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    CN104560737A