关于离子吸附类型稀土矿石的生物冲洗方法和微生物-矿物相互作用的研究
Yu Zhao1, Kui Zou1, Xiaoyu Meng1
1Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, China.
Journal of environmental management
|April 19, 2025
概括
这项研究表明,Aspergillus niger有效地从矿石中提取稀土元素 (REEs),使用三步生物炼方法. 这种环保的工艺利用微生物代谢物来实现可持续的REE开采.
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 (REEs) 是面临开采挑战的关键战略资源.
- 传统的REE开采方法带来了环境风险.
- 生物溶解为REE提取提供了一个更清洁的替代方案.
研究的目的:
- 调查使用尼日尔菌用于离子吸附稀土矿石的三种生物溶解方法的有效性.
- 探索Aspergillus niger和矿物质在生物炼过程中的相互作用.
- 为了确定由黑色阿斯伯吉路斯 (Aspergillus niger) 提取REE的机制.
主要方法:
- 测试了使用Aspergillus niger的三种不同的生物化方法.
- 使用了包括XRD,FT-IR,Raman和SEM-EDS在内的表征技术.
- 进行非向代谢,以分析微生物反应.
主要成果:
- 三步生物溶解方法证明了最高的REE提取效率.
- 黑色虫通过直接和间接的作用,在没有损害矿物结构的情况下,通过REEs出REEs.
- 直接水影响了Aspergillus niger的细胞形态,而代谢学揭示了压力反应和代谢调节.
结论:
- 黑色虫通过直接和间接的生物溶解机制促进REE回收.
- 三步方法是最佳的,利用微生物代谢物进行环保的REE提取.
- 这项研究为离子吸附稀土矿石开采提供了可持续的途径.
相关概念视频
00:56Extraction: Advanced Methods
390
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
390
03:45Formation of Complex Ions
23.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.0K
01:08Electrodeposition
421
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
421
00:46Bioremediation
18.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.1K
01:09Ion-Exchange Chromatography
252
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
252
01:17Precipitation and Co-precipitation
1.6K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.6K