Characterization of natural and anthropogenic dissolved organic matter in the yangtze river basin using FT-ICR MS

文献类型： 外文期刊

第一作者： Ning, Cuiping

作者： Ning, Cuiping;Ning, Cuiping;Sun, Shuai;Gao, Yuan;Zhang, Haijun;Chen, Jiping;Geng, Ningbo;Sun, Shuai;Xie, Huaijun;Wu, Lidong

作者机构：

关键词： Dissolved organic matter; FT-ICR MS; Yangtze River Basin; In-house database; Non-targeted analysis

期刊名称：WATER RESEARCH （ 影响因子：12.4； 五年影响因子：12.9 ）

ISSN： 0043-1354

年卷期： 2025 年 268 卷

页码：

收录情况： SCI

摘要： Dissolved organic matter (DOM) is a complex mixture that plays a crucial role in global carbon cycling and climate dynamics. Understanding the chemical composition of DOM is crucial for studying its biogeochemical behavior. However, identifying individual DOM molecules is challenging. Here, using ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry and an in-house database, we developed a framework to investigate DOM characteristics in natural water. Through the developed approach, we successfully identified thousands of individual DOM molecules in the water bodies of the Yangtze River Basin. For the first time, the proportions of natural and anthropogenic organics within DOM were revealed. In total, 9006 unambiguous molecular formulas were assigned to DOM in the Yangtze River Basin. The proportions of CHNO and CHOS compounds increased from upstream to downstream regions. Moreover, 1099 DOM compounds were tentatively identified, with 85% being endogenous organics and 15% being exogenous organics. Notably, lipids and pharmaceuticals and personal care products were the most frequently detected endogenous and exogenous compounds. The spatial variation of the identified DOM indicated anthropogenic discharges considerably increased both the number and abundance of DOM in the downstream Yangtze River Basin. This study highlighted the importance of anthropogenic impacts on DOM in water.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序