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在沙的地下河口中,海洋反抗者通过处理获得的溶解有机物质

Peng Zhang^1,2, Yinghui Wang^1,2, Biwei Yang^1,2,3

¹State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.

Environmental science & technology

|February 13, 2025

概括

沙的地下河口将溶解的有机物 (DOM) 转化为反抗性化合物. 这一过程随着盐度的增加而增加,可能为海洋提供持久的CRAM类分子.

科学领域:

环境科学环境科学
地质化学地质化学
海洋生物学海洋生物学

背景情况:

沙地地下河口 (STEs) 呈现出显著的地化学梯度 (盐度,氧化还原,pH).
STEs被认为是不稳定基质消费的热点.
海洋反抗生物溶解有机物 (DOM) 的起源在很大程度上是未知的.

研究的目的:

调查DOM在STEs中的命运.
确定STEs是否有助于形成反抗性DOM (RDOM).
描述DOM转化为富含碳素的环分子 (CRAM).

主要方法:

在中国广东沿海65米STE截面的21个地下水样本中对DOM的分析.
DOM组成的表征,包括CRAM的分数 (%CRAM).
在不同的氧化还原条件下 (氧化与减少) 评估DOM处理.

主要成果:

观察到DOM对CRAM的系统生物转化.
%CRAM显著增加 (33.1%至76.7%),随着DOM降解和盐度的增加.
在氧化条件下,DOM处理,包括可生物分解的分数,更为活跃.

结论:

STEs在将DOM转化为反抗性CRAM类化合物方面发挥着至关重要的作用.
海水通过全球性STEs的广泛循环表明,RDOM在海洋中的投入相当大.
在海洋环境中,STEs是CRAM类化合物的潜在来源.

关键词:

在FT-ICR MS中使用.分子分子分子的分子.强烈的溶解有机物质.沙的地下河口.热力学热力学热力学

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