基因主导的六价生物吸收的分子机制由Aspergillus niger子:光谱阐明和DFT验证
Binqiao Ren1, Yu Jin2, Xiaoxiao Song2
1Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150009, China; School of Environment, Harbin Institute of Technology, Harbin, 150001, China.
International journal of biological macromolecules
|October 3, 2025
概括
这项研究显示,Aspergillus niger子中的素是六价生物吸收的关键. 素有助于减少和固定,提供可持续的重金属修复策略.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 材料科学 材料科学 材料科学
背景情况:
- 六价 (Cr) 构成了严重的环境威胁.
- 有效的生物吸收剂对于重金属修复至关重要.
- 了解生物吸收机制对于开发有效解决方案至关重要.
研究的目的:
- 阐明由黑菌 (AS) 子对Cr(VI) 生物吸收的基主导的分子机制.
- 为开发用于重金属修复的基基功能材料提供理论指导.
主要方法:
- 使用离子和气体染色学-质谱学对AS组成的表征.
- 批量吸附实验以确定吸附能力和动力学.
- 密度函数理论 (DFT) 计算和福井函数分析以验证分子机制.
主要成果:
- 阿斯伯吉卢斯尼格尔 (Aspergillus niger) 子 (AS) 由91.7%的多糖化合物组成,证实存在素 (13.2%的D-葡萄糖胺化物).
- 在pH值为2.0的情况下,最大吸附能力达到106.29mgg-1 ,遵循伪二阶动力学 (化学吸附).
- DFT计算证实了基在通过协调相互作用 (结合能2.47 eV) 结合Cr(VI) 中的主导作用.
结论:
- 提出了一个三阶段的分子机制,涉及静电相互作用,Cr (VI) 通过基减少,以及稳定的固定.
- 基的多功能结合位点 (胺基,基,基) 对于Cr6的修复至关重要.
- 这项研究推进了使用基基生物吸收剂的可持续重金属修复策略.
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