揭示了通过光化学和微生物降解使用光EMs-PARAFACAC的光化学和微生物降解与Pb(II) 溶解有机物复合的变化
Liyang Yang1, Linwei Chen1, Wan-E Zhuang2
1College of Environment and Safety Engineering, Fuzhou University, Fuzhou, Fujian, PR China.
Environmental pollution (Barking, Essex : 1987)
|November 20, 2023
概括
降解过程显著改变溶解有机物 (DOM) 结构,削弱其与 (Pb) 的相互作用. 这些变化会影响水生环境中的金属污染物行为.
科学领域:
- 环境化学环境化学
- 水生化学 水生化学
- 生物地质化学生物地质化学
背景情况:
- 溶解有机物 (DOM) 影响水生系统中的金属污染物物种和风险.
- 光化学和微生物降解是DOM循环的关键过程,但它们对DOM金属相互作用的影响尚不清楚.
研究的目的:
- 研究光化学和微生物降解如何影响河流DOM与 (Pb) 的复合.
- 阐明水生环境中DOM-金属相互作用变异性背后的机制.
主要方法:
- 使用光灭定位和激发发射矩阵-并行因子分析 (EEMs-PARAFAC) 来分析DOM-Pb (II) 复合.
- 在降解后检查了DOM成分 (类似和类似蛋白质的成分) 和结构的变化.
主要成果:
- 照片和光微生物降解显著减少了类似的DOM成分,降低了平均分子量和化.
- DOM和Pb (II) 之间的相互作用因类丰度减少和结构变化而减弱.
- 类似蛋白质的成分显示出可变的Pb(II) 结合,有时由于与米类分数的竞争减少而增强.
结论:
- DOM降解,特别是光降解,改变了DOM结构,并显著影响了它对Pb的结合亲和力.
- 了解这些由降解驱动的变化对于预测水生生态系统中的金属污染物行为和风险至关重要.
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