石油在海洋系统中的光化学:自深水地平线泄漏事件以来的发展
Mohamed Elsheref1, Lena Messina1, Matthew A Tarr1
1Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA. mtarr@uno.edu.
Environmental science. Processes & impacts
|October 26, 2023
概括
石油泄漏严重影响海洋环境. 新的研究突出了光化学.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 摄影化学的使用.
背景情况:
- 石油泄漏对海洋生态系统构成重大威胁.
- 光化学在石油泄漏命运中的作用在历史上被低估了.
- 深水地平线漏油事件刺激了对石油光化学的新研究.
研究的目的:
- 审查自深水地平线事件以来了解漏油光化学的进展.
- 要突出以前未被承认的光化学对石油命运的短期影响.
- 通过光化学过程合成石油转化的新视角.
主要方法:
- 在深水地平线油污事件发生后发表的科学文献的审查.
- 分析采用各种方法研究石油光化学的研究.
- 检查研究石油光化学的分析技术的进步.
主要成果:
- 光化学在漏油的短期 (从数小时到数天) 转化中发挥着至关重要的作用.
- 光化学反应影响油的乳化,氧化和与微生物的相互作用.
- 改进的分析方法提高了对海洋环境中石油光化学的理解.
结论:
- 光化学是一个关键的,经常被忽视的,海洋石油泄漏命运的因素.
- 了解石油光化学对于准确的环境影响评估至关重要.
- 需要继续进行研究,才能充分阐明光化学对石油泄漏的复杂影响.
相关概念视频
Bioremediation
18.7K
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.
18.7K
Oxygenic Photosynthesis
19
Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
19
The Photochemical Reaction Center
4.1K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
4.1K
Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
Green Algae
26
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
26
Anoxygenic Photosynthesis
27
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
27


