复杂光溶解有机物 (FDOM) 沿帕奈纳河三角洲,巴西东北部
Thays Thayanne Luz-Santos1, Jean Louis Stéphane Mounier2, Rozane Valente Marins3
1Federal University of Ceará, Marine Science Institute/LABOMAR, Av. da Abolição, 3207, 60.165-081, Fortaleza, CE, Brazil; Université de Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584, 83041, Toulon, France.
Chemosphere
|June 21, 2025
概括
巴西帕纳伊巴河三角洲 (PRD) 中溶解的有机物表现出明显的特征,并与铜相互作用. 陆地溶解有机物质质量影响了赤道河口环境中的微量金属行为.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 海洋学 海洋学 海洋学
背景情况:
- 巴拿伊巴河三角洲 (PRD) 是巴西的一个大,影响最小的赤道三角洲.
- 干旱季节海水的入侵可能会影响三角洲水的组成.
- 了解溶解有机物 (DOM) 动态对于河口健康至关重要.
研究的目的:
- 调查DOM在PRD中的来源,特征和铜相互作用.
- 评估陆地输入和河口过程如何影响DOM.
- 确定DOM质量在赤道河口的微金属命运中的作用.
主要方法:
- 在春季潮条件下,在干旱季 (2019年,2021年) 期间在PRD进行地下水采样.
- 使用光光谱光学和紫外线可见吸收的DOM分析.
- 使用光火的DOM-铜相互作用的评估.
主要成果:
- 在PRD中的DOM主要是来自陆地来源的性物质,具有类似酸 (峰值C) 和类似酸 (峰值A) 的特征.
- 由于陆地输入,混合和生物地球化学转变,DOM分子量,化和芳香度在采样年之间有所不同.
- 在2021年观察到陆地酸类DOM和铜之间的强烈相互作用.
结论:
- 陆地DOM质量显著影响了赤道河口环境中的微量金属的可用性,运输和命运.
- 河口混合和生物地球化学过程与陆地输入相互作用,塑造DOM特征.
- PRD作为一个有价值的自然实验室,用于研究赤道三角洲的DOM微金属动力学.
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