对生物炭衍生的溶解有机物质的功能组与光活性之间的关系的新见解
Xin Zuo1, Zhuozhi Ouyang1, Jinmo Liao1
1College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China.
Water research
|June 15, 2024
概括
在地表水中释放的生物炭衍生溶解有机物 (BDOM) 具有显著的光活性. 它的分子组成,特别是芳香度,推动了活性氧物种 (ROS) 的产生,影响了污染物降解和生态风险评估.
科学领域:
- 环境化学环境化学
- 水的质量 水的质量
- 摄影化学的使用.
背景情况:
- 生物炭生产将大量光活性生物炭衍生溶解有机物 (BDOM) 释放到地表水中.
- BDOM的分子组成和光活性对于了解其环境命运和影响至关重要.
研究的目的:
- 从不同来源 (泥,竹子,茎) 来研究BDOM的分子组成.
- 探索BDOM分子组成及其光活性之间的关系,重点关注反应性氧物种 (ROS) 生产.
- 评估BDOM在模型污染物四环素 (TC) 的光降解中的作用.
主要方法:
- 里叶变换离子循环子子共振质谱 (FT-ICR MS) 用于分子特征.
- 使用四环素 (TC) 作为模型污染物的光降解实验.
- 电化学实验和密度函数理论 (DFT) 计算.
主要成果:
- 植物衍生BDOM显示,与污泥衍生BDOM相比,类似酸和芳香蛋白的光强度更高.
- 来自植物的BDOM含有更高比例的CHO分子配方.
- BDOM的光活性与其成分和功能组,特别是芳香成分,硫和氨基基组,有很强的相关性.
- 在BDOM中增强的电子和能量转移促进了ROS生成,导致TC光降解的增加.
结论:
- BDOM的分子组成决定了其光活性和产生ROS的能力.
- 芳香结构和BDOM中的特定功能组是其光化学行为的关键驱动因素.
- 了解BDOM的分子特性对于评估其生态风险和污染物修复潜力至关重要.
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