对元素产量的分析,细菌群体结构和碳来源对高档莫纳石稀土元素的生物溶解的影响
Melissa K Corbett1, April Gifford1, Nick Fimognari2
1Curtin Medical School, Curtin University GPO Box U1987, Perth, Australia.
Research in microbiology
|September 8, 2023
概括
这项研究探讨了利用微生物和糖从莫纳石中生物稀土元素 (REE) 的生物除. 果糖产生了最多的REE回收,主要是由于增加了像葡萄糖酸这样的有机酸生产.
科学领域:
- 生物技术和地质微生物学
- 可持续的资源回收可持续的资源回收
背景情况:
- 对稀土元素 (REEs) 的需求增加和供应链的脆弱性需要新的回收方法.
- 与传统的REE加工相关的环境问题凸显了需要更绿色的替代品,如生物化.
- 生物溶解为从二次来源,如废物流和矿山尾矿中提取可再生能源提供了一个有希望的方法.
研究的目的:
- 评估四种异构型微生物物种在从高档莫纳石中出REEs的疗效.
- 调查不同碳来源 (银糖,果糖,麦芽糖) 对REE生物溶解效率的影响.
- 确定微生物产生的占主导地位的有机酸及其在洗过程中的作用.
主要方法:
- 选择了四种具有已知的酸盐溶解能力的微生物物种.
- 进行了生物化实验,使用莫纳矿石与银河糖,果糖或麦芽糖作为碳来源.
- 分析了液以量化REE度,并确定产生的有机酸 (例如,使用染色学).
主要成果:
- 果糖作为碳来源导致了与银糖和麦芽糖相比,最高的REE回收率.
- 增强的REE漏是由于有机酸的产量增加,主要是葡萄糖酸,其次是酸.
- 莫纳的溶解具有挑战性,因为 (Ce) 对 (La), (Nd) 和 (Pr) 进行了偏好的出.
结论:
- 微生物生物溶解,特别是与果糖,显示出从莫纳中回收REE的潜力.
- 在这个过程中,有机酸生产,特别是葡萄糖酸,是推动REE溶解的关键机制.
- 需要进一步优化,以提高耐火矿石REE生物溶解的整体效率和选择性.
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