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Isótopos estables de plomo como marcador en aguas costeras
Science (New York, N.Y.)
|March 27, 1981
Resumen
Los isótopos estables de plomo revelan fuentes distintas de contaminación por plomo en la Columbia Británica.
Área de la Ciencia:
- Geoquímica del medio ambiente La geoquímica del medio ambiente.
- Química marina La química marina es la química de las aguas marinas.
- La geoquímica de los isótopos es la geoquímica de los isótopos.
Sus antecedentes:
- La contaminación por plomo es una preocupación ambiental significativa en los ecosistemas costeros.
- La identificación de las fuentes de plomo es crucial para una gestión y remediación medioambientales efectivas.
Objetivo del estudio:
- Para diferenciar entre las fuentes de plomo naturales e industriales en las aguas costeras de la Columbia Británica.
- Para utilizar relaciones estables de isótopos de plomo como marcadores para la contaminación por plomo.
Principales métodos:
- Análisis de las abundancias naturales de isótopos estables de plomo.
- Medición de las relaciones de isótopos de plomo, específicamente (206) Pb/(207) Pb.
- Cartografía espacial de las firmas de isótopos de plomo en aguas costeras y fiordes.
Principales resultados:
- Se observaron ratios distintos (206) Pb / (207) Pb para diferentes fuentes de plomo.
- Las aguas oceánicas costeras mostraron proporciones alrededor de 1,24.
- Las aguas de los fiordos afectadas por los relaves mineros exhibieron ratios cercanos a 1.22.
- Las aguas con influencia urbana mostraron proporciones más bajas, aproximadamente 1.163.
- Los datos de concentración de plomo alineados con los valores establecidos del agua de mar.
Conclusiones:
- El análisis de isótopos estables de plomo distingue efectivamente las fuentes de plomo naturales de las antropogénicas.
- Los relaves mineros y las actividades urbanas son contribuyentes identificables a la contaminación por plomo en el área de estudio.
- Los hallazgos proporcionan datos valiosos para la gestión de la contaminación por plomo en entornos marinos.
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