在受酸性矿井排水影响的河流中溶解有机物质的表征:组件和与金属的复合
Fangqing Li1, Lezhang Wei2, Yu Liu2
1Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
The Science of the total environment
|March 28, 2024
概括
在酸性矿井排水河流中溶解的有机物质的特点是类似和类似蛋白质的物质. 了解DOM金属复合是管理受污染的水道的关键.
科学领域:
- 环境化学环境化学
- 水上地球化学 水上地球化学
- 生物地质化学生物地质化学
背景情况:
- 溶解有机物 (DOM) 影响水生系统中的污染物运输.
- 在受酸性矿井排水 (AMD) 影响的河流中,DOM的化学成分尚不清楚.
- 这种知识差距限制了对DOM在污染河流中的元素循环中的作用的理解.
研究的目的:
- 为了研究DOM的度,光谱和分子特征,在一个被AMD污染的河流中.
- 识别主要的光元件及其来源.
- 探索DOM与AMD中发现的金属的复杂性.
主要方法:
- 测量了溶解有机碳 (DOC) 的度.
- 使用光谱技术分析了DOM.
- 通过里埃变换离子循环子子共振质谱法 (FT-ICR MS) 确定分子组成.
- 使用光火实验研究DOM金属复合.
主要成果:
- 类似化物 (C1) 和类似蛋白质 (C2) 的物质是主要的光DOM组件.
- 有时检测到类似三的物质 (C3).
- FT-ICR MS揭示了一组与素,和化合物和素相关的核心分子配方.
- 铁 (Fe) 表示与C2的结合最强,其次是C1.
- 其他金属离子的存在 (Mg (II),Ca (II),Cu (II)) 调节了DOM-Fe (III) 复合.
结论:
- 在AMD河流中的DOM成分包括类似和类似蛋白质的物质,其来源各不相同.
- DOM-金属复合,特别是Fe(III),受到DOM组成和共存的离子的影响.
- 这项研究通过了解DOM-金属相互作用,为管理和修复AMD影响的河流提供了关键的见解.
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