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| Screening of Efficient Rare Earth Leaching Bacteria and Study on Rare Earth Extraction Mechanism |
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Received:September 26, 2024
Revised:September 28, 2024
Accepted:September 29, 2024
Published Online:October 29, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.11.004 |
| KeyWord:rare earth; strain screening; bioleaching; biosorption |
| Author | Institution |
| HUANG Min |
中南大学矿物加工与生物工程学院 |
| SHEN Li |
中南大学矿物加工与生物工程学院 |
| ZHAO Hongbo |
中南大学矿物加工与生物工程学院 |
| QIU Guanzhou |
中南大学矿物加工与生物工程学院 |
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| Abstract: |
| Under the multiple requirements of the "dual carbon" target and environmental protection, biohydrometallurgy is gradually becoming a hot topic in the development and utilization of rare earth resources in China. Screening high-performance rare earth leaching strains and studying their leaching mechanisms is an important research direction. In this article, a Burkholderia cepacia XN4D0119 strain from soil in rare earth mining areas was screened and obtained. This strain has the ability to produce organic acids, dissolve phosphates, and tolerate rare earth stress. Under the optimum conditions, the adsorption rate of bacterial cells for La3+, Ce3+, Pr3+, Nd3+, Sm3+, Er3+ and Y3+ in the simulated solution is more than 98%. The fermentation broth of this strain was used to leach ion-adsorption type rare earth ore. Under the conditions of a liquid-solid ratio of 10︰1, temperature of 28 ℃, and rotational speed of 180 r/min, the total rare earth leaching rate is 33.80%, and the leaching rate of Y is 51.86%. In this study, a novel strain of highly efficient rare earth leaching bacteria has identified, which has important practical significance for the efficient extraction and recovery of rare earth elements (REEs). |
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