2026年 04期

黄河口北部海域溶解性有机质空间分布特征及来源分析

Spatial Distribution Characteristics and Source Apportionment of Dissolved Organic Matter in Northern Sea Area of the Yellow River Estuary

摘要(Abstract):

为了探究河口海域的溶解性有机质(DOM)的组分与来源的变化特征及其环境效应,以黄河口北部海域为研究区,分析不同水体水样的理化性质,并通过紫外-可见光吸收光谱、三维荧光光谱-平行因子分析方法分析不同水体中DOM的组成、分布及来源。结果表明,研究区海水中溶解有机碳(DOC)的质量浓度平均值为6.51 mg/L,低于地下水的DOC的质量浓度平均值8.99 mg/L,呈近岸高远岸低的特点;DOM中包含类酪氨酸组分C1、类色氨酸组分C2和类腐殖质组分C3 3种组分,组分C1、C2与浮游植物和水体微生物的代谢有关,组分C3主要与陆源输入和微生物活动有关;水体DOM受内源和外源共同作用,总体腐殖化水平较低,自生源特征明显;海水的吸收光谱特征参数均略大于地下水,海水中的DOM普遍具有更大的分子量、更强的芳香性特征及更显著的腐殖化水平。研究区DOM主要受水体总氮、溶解有机氮、溶解无机碳的影响,组成和来源受陆源输入与本地生物活动的双重影响。

关键词(KeyWords):溶解性有机质; 紫外-可见光吸收光谱; 三维荧光光谱; 环境因子; 黄河口

基金项目(Foundation):国家自然科学基金项目(42430712, 42302281); 济南市“新高校 20 条”引进创新团队项目(2021GXRC070); 山东省高等学校青创科技支持计划项目(2023KJ318)

作者(Author):雷宇,武显仓,胡晓农,支传顺,姚逸迪

DOI:10.13349/j.cnki.jdxbn.20260514.001

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