Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain)
Fuente:
Redalyc · Ciencias Marinas
This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemical cycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only few areas of the most important rias from a soc...
Guardado en:
| Publicado en: | Ciencias Marinas |
|---|---|
| Autor principal: | |
| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Universidad Autónoma de Baja California
2003
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1878325298378833920 |
|---|---|
| author | Carmen Tubío |
| author_facet | Carmen Tubío |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) Carmen Tubío Mª del Carmen Barciela Ricardo Prego Antonio Cobelo García Ciencias de la Tierra ria lead Galicia sediment contamination This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemicalcycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only fewareas of the most important rias from a socio-economic point of view. Thirty-five samples of superficial sediment were analysedfor lead (in the < 63 µm and total fractions) and opal percentage and organic carbon in the total. An analytical method is proposedemploying ETAAS, whereby the sediment is introduced directly as a slurry together with the optimised amount of chemicalmodifiers. The accuracy of the method was checked by means of a certified reference material, obtaining a sensitivity of2.72 µg g1 Pb with an RSD of 5.9%.Values of lead in the superficial sediment of the Ria of Ferrol ranged from 13.5 to 159.1 µg g1 for the fraction < 63 µm, andfrom 12.1 to 142.5 µg g1 for the total fraction. The distribution does not follow a decreasing trend from the innermost part of theria, as may have been expected, but rather the maximum values were found in the vicinity of the harbour area in the middle ria,indicating that rias behave as a lead deposition barrier avoiding the export of the metal to the open sea. Lead dispersion is mainlycontrolled by the tidal currents, given its lowest concentrations in the zones of strongest current, and also by the plankton,following the relationship obtained [Pb] = 48 [opal] + 16. A baseline lead concentration of 18.2 µg g1 was obtained for thefraction < 63 µm using core samples dated at 3745 ± 70 years before present. Applying this background values, the leadenrichment in the Ria of Ferrol is classified from moderate to considerable. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029416 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/161 10.7773/cm.v29i4.161 |
| description | This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemical cycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only few areas of the most important rias from a socio-economic point of view. Thirty-five samples of superficial sediment were analysed for lead (in the < 63 ∞m and total fractions) and opal percentage and organic carbon in the total. An analytical method is proposed employing ETAAS, whereby the sediment is introduced directly as a slurry together with the optimised amount of chemical modifiers. The accuracy of the method was checked by means of a certified reference material, obtaining a sensitivity of 2.72 ∞g g–1 Pb with an RSD of 5.9%. Values of lead in the superficial sediment of the Ria of Ferrol ranged from 13.5 to 159.1 ∞g g–1 for the fraction < 63 ∞m, and from 12.1 to 142.5 ∞g g–1 for the total fraction. The distribution does not follow a decreasing trend from the innermost part of the ria, as may have been expected, but rather the maximum values were found in the vicinity of the harbour area in the middle ria, indicating that rias behave as a lead deposition barrier avoiding the export of the metal to the open sea. Lead dispersion is mainly controlled by the tidal currents, given its lowest concentrations in the zones of strongest current, and also by the plankton, following the relationship obtained [Pb] = 48 [opal] + 16. A baseline lead concentration of 18.2 ∞g g–1 was obtained for the fraction < 63 ∞m using core samples dated at 3745 ± 70 years before present. Applying this background values, the lead enrichment in the Ria of Ferrol is classified from moderate to considerable.
El artículo aborda, a partir del sedimento de la Ría de Ferrol, la necesidad de un mayor conocimiento del ciclo biogeoquímico del plomo en las rías gallegas, basado hasta este momento en metodologías dispares aplicadas primordialmente a la biota en zonas puntuales de las rías más importantes socioeconómicamente. Se partió de 35 muestras de sedimento superficial, en cuya fracción total se analizaron la concentración de plomo, los porcentajes de ópalo y el carbono orgánico, mientras que en la fracción < 63 µm sólo se midió el plomo. Para estas muestras se propuso un procedimiento analítico basado en la espectrometría de absorción atómica con atomización en cámara de grafito, donde el sedimento en forma de suspensión se introdujo directamente junto con la cantidad optimizada de modificadores químicos. La exactitud del método se verificó mediante el uso de un material de referencia, obteniéndose una sensibilidad de 2.72 µg g–1 de Pb y una precisión de RSD 5.9 %. Los valores medidos para el plomo en el sedimento superficial de la Ría de Ferrol se encontraron entre 13.5 y 159.1 µg g–1 para la fracción menor de 63 µm y de 12.1 a 142.5 µg g–1 para la total. La distribución no sigue en patrón decreciente desde el fondo de la ría, como era de esperar, sino que tiene su máximo en el área portuaria situada en la parte media de la ría, indicando que las rías deben actúar como una barrera de deposición de plomo. En la dispersión de este metal intervienen principalmente la marea, dada su menor concentración en zonas de mayor corriente, y el plancton, por la relación: [Pb] = 48 [ópalo] + 16. Se ha cuantificado un valor de fondo de 18.2 µg g–1 de Pb para la fracción sedimentaria < 63 µm con muestras fechadas con 3745 ± 70 años de antigüedad. Aplicando éste, los factores de enriqueciminento para la Ría de Ferrol permiten clasificar su contaminación por plomo entre moderada y considerable. |
| format | Artículo científico |
| id | redalyc_48029416 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) Presencia, distribución y niveles de contaminación de plomo en el sedimentos superficiales de la Ría de Ferrol (NO de España) Prego, R Cobelo-García, A Tubío, C Barciela, MC lead contamination sediment ria Galicia plomo contaminación sedimento ría Galicia This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemical cycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only few areas of the most important rias from a socio-economic point of view. Thirty-five samples of superficial sediment were analysed for lead (in the < 63 ∞m and total fractions) and opal percentage and organic carbon in the total. An analytical method is proposed employing ETAAS, whereby the sediment is introduced directly as a slurry together with the optimised amount of chemical modifiers. The accuracy of the method was checked by means of a certified reference material, obtaining a sensitivity of 2.72 ∞g g–1 Pb with an RSD of 5.9%. Values of lead in the superficial sediment of the Ria of Ferrol ranged from 13.5 to 159.1 ∞g g–1 for the fraction < 63 ∞m, and from 12.1 to 142.5 ∞g g–1 for the total fraction. The distribution does not follow a decreasing trend from the innermost part of the ria, as may have been expected, but rather the maximum values were found in the vicinity of the harbour area in the middle ria, indicating that rias behave as a lead deposition barrier avoiding the export of the metal to the open sea. Lead dispersion is mainly controlled by the tidal currents, given its lowest concentrations in the zones of strongest current, and also by the plankton, following the relationship obtained [Pb] = 48 [opal] + 16. A baseline lead concentration of 18.2 ∞g g–1 was obtained for the fraction < 63 ∞m using core samples dated at 3745 ± 70 years before present. Applying this background values, the lead enrichment in the Ria of Ferrol is classified from moderate to considerable. El artículo aborda, a partir del sedimento de la Ría de Ferrol, la necesidad de un mayor conocimiento del ciclo biogeoquímico del plomo en las rías gallegas, basado hasta este momento en metodologías dispares aplicadas primordialmente a la biota en zonas puntuales de las rías más importantes socioeconómicamente. Se partió de 35 muestras de sedimento superficial, en cuya fracción total se analizaron la concentración de plomo, los porcentajes de ópalo y el carbono orgánico, mientras que en la fracción < 63 µm sólo se midió el plomo. Para estas muestras se propuso un procedimiento analítico basado en la espectrometría de absorción atómica con atomización en cámara de grafito, donde el sedimento en forma de suspensión se introdujo directamente junto con la cantidad optimizada de modificadores químicos. La exactitud del método se verificó mediante el uso de un material de referencia, obteniéndose una sensibilidad de 2.72 µg g–1 de Pb y una precisión de RSD 5.9 %. Los valores medidos para el plomo en el sedimento superficial de la Ría de Ferrol se encontraron entre 13.5 y 159.1 µg g–1 para la fracción menor de 63 µm y de 12.1 a 142.5 µg g–1 para la total. La distribución no sigue en patrón decreciente desde el fondo de la ría, como era de esperar, sino que tiene su máximo en el área portuaria situada en la parte media de la ría, indicando que las rías deben actúar como una barrera de deposición de plomo. En la dispersión de este metal intervienen principalmente la marea, dada su menor concentración en zonas de mayor corriente, y el plancton, por la relación: [Pb] = 48 [ópalo] + 16. Se ha cuantificado un valor de fondo de 18.2 µg g–1 de Pb para la fracción sedimentaria < 63 µm con muestras fechadas con 3745 ± 70 años de antigüedad. Aplicando éste, los factores de enriqueciminento para la Ría de Ferrol permiten clasificar su contaminación por plomo entre moderada y considerable. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2003-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/161 10.7773/cm.v29i4.161 Ciencias Marinas; Vol. 29 No. 4 (2003); 561-571 Ciencias Marinas; Vol. 29 Núm. 4 (2003); 561-571 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/161/137 ['Redalyc'] redalyc_48029416 Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) ['Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain)', 'Carmen Tubío', 'Ciencias de la Tierra', 'ria', 'lead', 'Galicia', 'sediment', 'contamination', 'Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) Carmen Tubío Mª del Carmen Barciela Ricardo Prego Antonio Cobelo García Ciencias de la Tierra ria lead Galicia sediment contamination This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemicalcycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only fewareas of the most important rias from a socio-economic point of view. Thirty-five samples of superficial sediment were analysedfor lead (in the < 63 µm and total fractions) and opal percentage and organic carbon in the total. An analytical method is proposedemploying ETAAS, whereby the sediment is introduced directly as a slurry together with the optimised amount of chemicalmodifiers. The accuracy of the method was checked by means of a certified reference material, obtaining a sensitivity of2.72 µg g\x961 Pb with an RSD of 5.9%.Values of lead in the superficial sediment of the Ria of Ferrol ranged from 13.5 to 159.1 µg g\x961 for the fraction < 63 µm, andfrom 12.1 to 142.5 µg g\x961 for the total fraction. The distribution does not follow a decreasing trend from the innermost part of theria, as may have been expected, but rather the maximum values were found in the vicinity of the harbour area in the middle ria,indicating that rias behave as a lead deposition barrier avoiding the export of the metal to the open sea. Lead dispersion is mainlycontrolled by the tidal currents, given its lowest concentrations in the zones of strongest current, and also by the plankton,following the relationship obtained [Pb] = 48 [opal] + 16. A baseline lead concentration of 18.2 µg g\x961 was obtained for thefraction < 63 µm using core samples dated at 3745 ± 70 years before present. Applying this background values, the leadenrichment in the Ria of Ferrol is classified from moderate to considerable. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029416 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29'] ['Carmen Tubío'] ['Carmen Tubío'] ['Artículo científico'] ['2003'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'ria', 'lead', 'Galicia', 'sediment', 'contamination'] ['https://www.redalyc.org/articulo.oa?id=48029416'] ['Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) Carmen Tubío Mª del Carmen Barciela Ricardo Prego Antonio Cobelo García Ciencias de la Tierra ria lead Galicia sediment contamination This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemicalcycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only fewareas of the most important rias from a socio-economic point of view. Thirty-five samples of superficial sediment were analysedfor lead (in the < 63 µm and total fractions) and opal percentage and organic carbon in the total. An analytical method is proposedemploying ETAAS, whereby the sediment is introduced directly as a slurry together with the optimised amount of chemicalmodifiers. The accuracy of the method was checked by means of a certified reference material, obtaining a sensitivity of2.72 µg g\x961 Pb with an RSD of 5.9%.Values of lead in the superficial sediment of the Ria of Ferrol ranged from 13.5 to 159.1 µg g\x961 for the fraction < 63 µm, andfrom 12.1 to 142.5 µg g\x961 for the total fraction. The distribution does not follow a decreasing trend from the innermost part of theria, as may have been expected, but rather the maximum values were found in the vicinity of the harbour area in the middle ria,indicating that rias behave as a lead deposition barrier avoiding the export of the metal to the open sea. Lead dispersion is mainlycontrolled by the tidal currents, given its lowest concentrations in the zones of strongest current, and also by the plankton,following the relationship obtained [Pb] = 48 [opal] + 16. A baseline lead concentration of 18.2 µg g\x961 was obtained for thefraction < 63 µm using core samples dated at 3745 ± 70 years before present. Applying this background values, the leadenrichment in the Ria of Ferrol is classified from moderate to considerable. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029416 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29'] |
| spellingShingle | Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) Carmen Tubío Ciencias de la Tierra ria lead Galicia sediment contamination Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) Carmen Tubío Mª del Carmen Barciela Ricardo Prego Antonio Cobelo García Ciencias de la Tierra ria lead Galicia sediment contamination This article discuss, using sediment samples from the Ria of Ferrol, the need for a better understanding of the biogeochemicalcycle of lead in the Galician rias which, until now, was based on differing methodologies mainly applied to the biota in only fewareas of the most important rias from a socio-economic point of view. Thirty-five samples of superficial sediment were analysedfor lead (in the < 63 µm and total fractions) and opal percentage and organic carbon in the total. An analytical method is proposedemploying ETAAS, whereby the sediment is introduced directly as a slurry together with the optimised amount of chemicalmodifiers. The accuracy of the method was checked by means of a certified reference material, obtaining a sensitivity of2.72 µg g1 Pb with an RSD of 5.9%.Values of lead in the superficial sediment of the Ria of Ferrol ranged from 13.5 to 159.1 µg g1 for the fraction < 63 µm, andfrom 12.1 to 142.5 µg g1 for the total fraction. The distribution does not follow a decreasing trend from the innermost part of theria, as may have been expected, but rather the maximum values were found in the vicinity of the harbour area in the middle ria,indicating that rias behave as a lead deposition barrier avoiding the export of the metal to the open sea. Lead dispersion is mainlycontrolled by the tidal currents, given its lowest concentrations in the zones of strongest current, and also by the plankton,following the relationship obtained [Pb] = 48 [opal] + 16. A baseline lead concentration of 18.2 µg g1 was obtained for thefraction < 63 µm using core samples dated at 3745 ± 70 years before present. Applying this background values, the leadenrichment in the Ria of Ferrol is classified from moderate to considerable. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029416 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.29 |
| title | Presence, distribution and contamination levels of lead in the surface sediments of the Ria of Ferrol (NW Spain) |
| title_alt | Presencia, distribución y niveles de contaminación de plomo en el sedimentos superficiales de la Ría de Ferrol (NO de España) |
| topic | Ciencias de la Tierra ria lead Galicia sediment contamination |
| topic_facet | lead contamination sediment ria Galicia plomo contaminación sedimento ría |
| url | https://www.redalyc.org/articulo.oa?id=48029416 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/161 |