用吸收光谱学与FT-ICR MS相结合,描述光化学生产中溶解有机物中的碳素含量

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Updated: Jul 14, 2025

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

Zizhuo Wei¹, Na Li¹, Xinyi Zhang²

¹College of Resources and Civil Engineering, Northeastern University, Shenyang, 110819, Liaoning, China; Qinhuangdao key Laboratory of Water-saving Pollution Control and Ecological Restoration, College of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, Hebei, China.

|October 8, 2023

概括

从藻类中溶解的有机物 (DOM) 非常容易受到光降解,与沉积物DOM不同. 控制藻类繁殖可以提高地表水的稳定性,提高有机物质的质量和数量.

科学领域:

环境化学环境化学
有机地化学有机地化学
摄影化学的使用.

背景情况:

溶解有机物 (DOM) 在水生生态系统中起着至关重要的作用.
辐射显著改变DOM结构,反应性和环境行为.
鉴定DOM在环境相关度的特征是具有挑战性的,因为它的异质性.

研究的目的:

研究DOM光降解在四个来源的分子水平差异:地表水,沉积物和细胞内/细胞外藻类DOM.
量化辐射诱导的碳基和基部分的变化.
提出功能组对DOM光降解的影响机制.

主要方法:

里埃变换离子旋转子共振质谱 (FT-ICR MS) 用于分子层面的分析.
用于量化碳和DOM部分的光谱定位.
来自地表水,沉积物和藻类来源的DOM的比较分析.

主要成果:

细胞内藻类DOM (I-DOM) 显示了最高的光降解 (63%的损失),其次是细胞外藻类DOM (E-DOM) 和表面水DOM (W-DOM) (15%的损失).
沉积物DOM (S-DOM) 对光降解具有很高的抵抗力.
在I-DOM和E-DOM中,脂质,类和类化合物具有光敏性,与基和基组的变化有关.

结论:

DOM对光降解的敏感性因来源而异,藻类DOM最容易受到影响.
W-DOM 和 S-DOM 的光电阻力归因于它们的碳基和基功能群的稳定性.
藻类丰富是地表水DOM光活性的一个关键因素,这表明花控制可以提高有机物质的稳定性.

关键词:

碳基氧化物.溶解的有机物质是有机物质.在FT-ICR MS中使用.烯酸 (Phenol) 是一种通过光氧化进行光氧化.紫外线可见吸收光谱学

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