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Isolation and identification of the molybdenum-resistant strain Raoultella ornithinolytica A1 and its effect on MoO42− in the environment

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Abstract

The mining and leakage of molybdenum (Mo) can cause environmental contamination which has not been realized until recently. Bacteria that can mitigate Mo-contamination was enriched and isolated. The low temperature and different pH conditions were considered to analysis its feasibility in Northern China which suffers from a long time of low temperatures every year. The result showed that the removal rate of MoO42− by Raoultella ornithinolytica A1 reached 30.46% at 25 °C and pH 7.0 in Luria–Bertani medium (LB). Meanwhile, A1 also showed some efficiency in the reduction of MoO42− in low phosphate molybdate medium (LPM), which reached optimum at the MoO42− concentration of 10 mM. The results of FTIR indicated that the cell wall performed an essential role in the MoO42− removal process, which was illustrated by the distribution of Mo in A1 (Mo bound to cell wall accounted for 92.29% of the total MoO42− removed). In addition, low temperature (10 °C) effect the removal rate of MoO42− by − 8.38 to 11.66%, indicating the potential for the in-situ microbial remediation of Mo-contaminated environments in low temperature areas.

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Data availability

All raw data is publicly available on the NCBI GenBank database (Accession Number: OP518431) and upon request.

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Acknowledgements

The authors thank Heilongjiang Provincial Research Academy of Environmental Sciences for financial support, and Harbin Institute of Technology for technical assistance in the laboratory.

Funding

This work was financially supported by the Scientific Research Project of the Heilongjiang Provincial Institute of Scientific Research.

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Contributions

Study design and organization were performed by JX. Experiment operation and sample analysis, writing-review and editing were performed by CL, WL, XZ and ZL. Conceptualization, formal analysis, writing-review and editing were performed by AL. All authors improved the manuscript through comments and text suggestions and all authors approved the final manuscript.

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Correspondence to Ang Li.

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Xing, J., Li, C., Li, W. et al. Isolation and identification of the molybdenum-resistant strain Raoultella ornithinolytica A1 and its effect on MoO42− in the environment. Biodegradation 34, 169–180 (2023). https://doi.org/10.1007/s10532-022-10011-4

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  • DOI: https://doi.org/10.1007/s10532-022-10011-4

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