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氧化和氧化的植物提取由瑞草在生物增强水培环境中

Maedeh Soleimanifar¹, Lucia Rodriguez-Freire²

¹John A. Reif, Jr. Department of Civil & Environmental Engineering, New Jersey Institute of Technology, 07102, Newark, NJ, United States; Now at Civil Engineering Department, The City College of New York, The City University of New York, 10031, New York, NY, United States.

Environmental pollution (Barking, Essex : 1987)

|April 14, 2024

概括

刺激本地微生物增强了稀土元素 (REE) 纳米颗粒在瑞草中的恢复. 这项研究表明,内源性微生物比引入的细菌更有效地从废物中进行REE植物积累.

科学领域:

环境科学环境科学
生物技术是生物技术.
地质化学地质化学

背景情况:

稀土元素 (REE) 的可持续回收对电子,能源和医疗技术至关重要.
开采REE会对环境造成破坏;植物回收提供了一个可持续的替代方案.
从纳米颗粒中提取REE的植物提取,这是一个不太溶解的阶段,尚未研究.

研究的目的:

为了研究生物刺激和生物增强对REE纳米颗粒 (REE-NP) 植物恢复的影响,使用麦草.
为了比较引入的微生物与刺激内源微生物群落对REE植物积累的疗效.

主要方法:

在水培实验中,将草暴露在氧化 (CeO2) 和氧化 (Nd2O3) 纳米颗粒中.
使用Methylobacterium extorquens AM1进行生物增强和使用内源微生物进行生物刺激.
扫描电子显微镜与能量分散光谱 (SEM-EDS) 用于植物组织中的纳米粒子分析.

主要成果:

甲基博细菌extorquens AM1并没有增强CeO2纳米粒子积累,但在无菌条件下改善了Ce转位.
与M. extorquens相比,Bacillus subtilis是一种内源性细菌,显著增加了Ce提取率.
生物刺激导致REE-NP的高Ce (705μg/g) 和Nd (19,641μg/g) 植物积累.
SEM-EDS证实了Nd2O3纳米粒子在根表面和细胞内积累.

结论:

刺激内源微生物群落是增强从纳米颗粒中增强REE植物积累的优越策略.
由土著微生物促进的瑞草的REE-NP植物提取,显示了可持续REE回收的前景.
这种方法有助于减少对传统采矿的依赖,并恢复受影响的土地.

关键词:

生物增强是一种生物增强.生物修复是一种生物修复.生物刺激是生物刺激.植物恢复恢复植物恢复稀土元素纳米粒子是稀土元素的纳米粒子.

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