Video Experimental Relacionado
Updated: Jun 10, 2026

10:04
Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes
Published on: May 26, 2014
Enriquecimiento de iridio en partículas aerotransportadas del volcán Kilauea: enero de 1983
Resumen
Las emisiones volcánicas del volcán Kilauea contenían altos niveles de iridio, un elemento que no se había visto antes en tales erupciones. Esto sugiere Kilauea.
Área de la Ciencia:
- La geoquímica es la geoquímica.
- Volcanología Volcanología.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- La toma de muestras de partículas en el aire en el Observatorio de Mauna Loa monitorea la circulación global de partículas.
- La erupción del volcán Kilauea en enero de 1983 brindó la oportunidad de analizar las emisiones volcánicas.
Objetivo del estudio:
- Para analizar la composición elemental de las partículas en suspensión en el aire de la erupción del Kilauea.
- Para investigar enriquecimientos elementales inusuales, en particular el iridio, en las emisiones volcánicas.
Principales métodos:
- Recopilación de partículas en suspensión en los filtros de aire en el Observatorio de Mauna Loa.
- Análisis elemental de las muestras de filtro recolectadas para determinar las concentraciones de varios elementos.
Principales resultados:
- Las muestras mostraron altas concentraciones esperadas de selenio, arsénico, indio, oro y azufre.
- Se detectaron concentraciones sorprendentemente altas de iridio, con una proporción de iridio a aluminio 17.000 veces mayor que en el basalto hawaiano.
- El enriquecimiento de iridio se correlacionó con un alto contenido de flúor en los gases volcánicos.
Conclusiones:
- El enriquecimiento de iridio de la erupción del Kilauea sugiere un inusual sistema volcánico potencialmente alimentado por el magma del manto.
- Los hallazgos indican que el iridio puede liberarse como un compuesto volátil, como el hexafluoruro de iridio (IrF6), vinculado al flúor.
- Este estudio pone de relieve el potencial para descubrir nuevos procesos geoquímicos en las emisiones volcánicas.
Videos de Conceptos Relacionados
The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
The Sulfur Cycle
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
Precipitate Formation and Particle Size Control
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
Volatilization
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...
Variation of Atmospheric Pressure
Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Pulmonary Ventilation: Inhalation
Pulmonary ventilation is a vital process that ensures the exchange of oxygen and carbon dioxide in the lungs. It refers to the movement of air into and out of the lungs, enabling the body to obtain oxygen and remove waste carbon dioxide. In this article, we will explore the intricacies of pulmonary ventilation, including its underlying principles, mechanisms, and the interplay of pressures within the respiratory system.
Boyle's law becomes particularly pertinent when examining respiratory...
Boyle's law becomes particularly pertinent when examining respiratory...

