植物捕获的火山气溶:对纳米粒子及其化学成分的研究
Marine Gelin1, Mickaël Tharaud1, Marc F Benedetti1
1Université Paris Cité - Institut de Physique du globe de Paris, CNRS, F75005 Paris, France.
The Science of the total environment
|January 17, 2025
概括
火山纳米粒子 (NP) 的特征是使用先进的质谱学. 植物有效地在烟雾附近取样这些NP,揭示了多元素和微量元素组成,其中一些具有潜在的生态影响.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 分析化学 分析化学
背景情况:
- 纳米粒子 (NP) 由于它们的反应性和可移动性,造成环境和健康风险.
- 火山是大气NP的重要自然来源,但它们的环境命运仍未得到充分研究.
- 单粒子感应合等离子体质谱学 (spICP-MS) 的进展使得详细的NP特征化成为可能.
研究的目的:
- 来自瓜德罗普的La Soufrière火山的火山纳米粒子 (NP) 的特征.
- 为了调查在活跃和不活跃的火山时期发出的NP.
- 评估植物作为火山NPs附近烟雾的自然采样者.
主要方法:
- 对古代火山灰和烟雾凝结物的分析.
- 使用植物作为空气中的NP的被动采样.
- 在单颗粒模式 (spICP-ToF-MS) 中使用的ICP-MS飞行时间用于多元元素分析.
- 应用了NP数据处理的等级聚合集群.
主要成果:
- 确定了三种多元素NP (Al+Si,Al+Fe,Ti+Al) 和三种单元素NP (Al,Si,Fe) 的类型.
- 在Sphagnum孔水中检测到的微量元素NP (例如Sr-Ce-La,CeLa,Cr,Cu,Zn).
- 已确认的植物作为有效的采样者,捕获效率受叶子特征的影响.
- 与火山,碎石和大气材料的NP元素比率进行比较,以确认火山起源.
结论:
- 植物可以在极端环境中作为火山纳米颗粒的有效生物监测器.
- 火山活动释放出各种NP,包括潜在的有毒微量元素.
- spICP-ToF-MS是一个强大的工具,用于环境样本中描述复杂的NP混合物.
相关概念视频
02:35Key Elements for Plant Nutrition
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the atmosphere, the...
02:11The Roles of Bacteria and Fungi in Plant Nutrition
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
01:10Volatilization
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...