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Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)
Published on: May 16, 2016
Hidrocarburos aromáticos policíclicos sedimentarios: el registro histórico.
Science (New York, N.Y.)
|November 25, 1977
Resumen
Los investigadores analizaron los hidrocarburos aromáticos policíclicos (HAP) en el sedimento de la bahía de Buzzards. Los hallazgos indican que los HAP en esta área se originan principalmente de la quema de combustibles fósiles.
Área de la Ciencia:
- Ciencias ambientales Ciencias ambientales.
- La geoquímica es la geoquímica.
- Química orgánica es la química orgánica.
Sus antecedentes:
- Los hidrocarburos aromáticos policíclicos (HAP) son compuestos orgánicos formados durante la combustión incompleta.
- Los núcleos de sedimentos proporcionan un registro histórico de las condiciones ambientales.
- Comprender las fuentes de HAP es crucial para el monitoreo ambiental y la evaluación de riesgos.
Objetivo del estudio:
- Para investigar las fuentes de hidrocarburos aromáticos policíclicos (HAP) en Buzzards Bay, Massachusetts.
- Para establecer un registro histórico de la deposición de HAP en la región.
- Determinar los principales contribuyentes a los niveles de HAP sedimentarios.
Principales métodos:
- Análisis de hidrocarburos aromáticos policíclicos (HAP) mediante espectrometría cromatográfica de gases.
- Examen de tres secciones distintas de un núcleo de sedimento fechado.
- Aplicación de técnicas de química analítica para la identificación y cuantificación de compuestos.
Principales resultados:
- Se detectaron hidrocarburos aromáticos policíclicos (HAP) en todas las secciones de sedimento analizadas.
- Se observaron perfiles distintos de HAP, indicativos de fuentes de entrada específicas.
- La composición de los HAP sugiere un origen antropogénico dominante.
Conclusiones:
- Los hidrocarburos aromáticos policíclicos sedimentarios en la bahía de Buzzards se derivan predominantemente de la combustión antropogénica de combustibles fósiles.
- Los hallazgos destacan el impacto significativo de las actividades humanas en el medio acuático local.
- Este estudio proporciona datos históricos valiosos para comprender la dinámica de la contaminación por HAP.
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