【摘要】 在“双碳”目标和环境保护的多重要求下，生物冶金正逐步成为我国稀土资源开发利用研究的热点，筛选稀土高性能浸出菌株及其稀土提取机理研究是一个重要的方向。本文从稀土矿区土壤中筛选获得一株Burkholderia cepacia XN4D0119,该菌株具有产有机酸、溶解磷酸盐和耐受稀土胁迫的能力。在优化条件下，菌体对模拟液中La³⁺、Ce³⁺、Pr³⁺、Nd³⁺、Sm³⁺、Er³⁺、Y³⁺的吸附率大于98%。利用该菌株的发酵液浸出离子型稀土矿，在液固比为10∶1、温度28℃、转速180 r/min的条件下，总稀土浸出率为33.80%,Y的浸出率为51.86%。本研究筛选出一株新型稀土高效浸出菌，对稀土元素高效提取和回收具有重要的实践意义。更多还原

【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 optimized 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）.更多还原