北运河上覆水DOM分子组成和结构特征

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Abstract FT-ICR-MS technology and analytical methods were used to comprehensively characterize the compositional and structural characteristics of DOM molecules in the overlying water of the Beiyun River, revealing the migration and transformation rules of DOM molecular composition and evaluating the potential environmental impact of DOM molecular composition. The results indicated that the DOM molecular compounds in the overlying water of the Beiyun River were mainly composed of lignin (63.19%) and proteins (12.96%). The stable DOM molecular formulas in the overlying water were mainly refractory lignin and basic metabolites and secretions that are continuously recycled and regenerated. The diversity of unique DOM molecular formulas correlated with intensity anthropogenic activities. The common DOM molecular formula that was preferentially transformed or degraded was mainly lignin with highly chemically active carboxyl and hydroxyl groups and liable lipids, proteins and carbohydrates. The Beiyun River had the characteristics of high input of exogenous wastewater, resulting in a large amount of liable DOM compounds in the overlying water, which increased the potential risk of river eutrophication.

Key words： Beiyun river overlying water dissolved organic matter (DOM) molecular composition and structure

Received: 09 April 2022

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X522

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	Articles by authors
	SUN Qing-xuan
	ZHANG Li
	YANG Jia-chun

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SUN Qing-xuan,ZHANG Li,YANG Jia-chun. Compositional and structural characteristics of DOM molecules in the overlying water of the Beiyun River[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(11): 5299-5307.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I11/5299

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