与人为有机物质再悬浮相关的水生脱氧化
Bartolomé Morote-Sánchez1, Jordi Colomer2, Marianna Soler2
1Department of Mining and Civil Engineering, Technical University of Cartagena (UPCT), Cartagena, E-30203, Spain.
Water research
|February 27, 2025
概括
在风暴期间的沉积物再悬浮显著耗尽了像Mar Menor这样的沿海湖中的氧气. 沉积物中的有机物质含量是这种氧气耗尽的主要驱动因素,对生态系统管理至关重要.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 欧洲化研究研究 欧洲化研究
背景情况:
- 沿海的湖面临着严重的人类活动和高化的退化.
- 马雷诺湖就是一个例子,在风引起的沉积物重新悬浮后,经历氧气耗尽和鱼类死亡.
研究的目的:
- 在风引起的沉积物再悬浮事件期间分析水柱中的氧气消耗.
- 开发一种用于水生生态系统中氧气耗尽的预测模型.
主要方法:
- 使用振荡网格装置模拟湖条件的实验室实验.
- 对来自马门诺的沉积物样本的分析,在复悬浮强度,颗粒大小和有机物质含量方面有所不同.
主要成果:
- 随着沉积物再悬浮的增加,粒子大小的增加和有机物质含量的增加,氧气耗尽的增加.
- 有机物质含量被确定为影响氧气耗尽的最重要因素.
结论:
- 基于沉积物特征和再悬浮水平,开发了氧气耗尽的预测模型.
- 了解这些过程对于管理人为影响的沿海湖至关重要.
相关概念视频
00:46Bioremediation
18.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.1K
01:21The Phosphorus Cycle
36.3K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
36.3K
00:54What are Biogeochemical Cycles?
30.9K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
30.9K
01:06Primary Production
23.5K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.5K
01:27Oxygen Transport in the Blood
2.4K
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
2.4K
01:20Radical Autoxidation
2.1K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
2.1K