Background heavy metal levels in estuarine sediments and organisms in Galicia (northwest Spain) as determined by modal analysis

Carral, Emilio; Puente, Xoán; Villares, Ramón; Carballeira, A.

doi:10.1016/0048-9697(95)04788-3

Cited by 87 publications

(30 citation statements)

References 31 publications

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“…While elevated Fe concentrations in seawaters occur due to weathering of naturally occurring iron minerals such as goethite, hematite, magnetite and siderite, the presence of elevated concentrations of heavy metals in seawater cannot readily be attributed to mineral weathering and is more likely an indicator of anthropogenic contamination (Carral et al 1995;Williams 1996).…”

Section: Metal Concentrations In Seawatermentioning

confidence: 99%

Metal distributions in seawater, sediment and marine benthic macroalgae from the South Australian coastline

Chakraborty

Owens

2013

Int. J. Environ. Sci. Technol.

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Algal species which are ubiquitous along the coastlines of many countries reflect the environmental conditions of the coastal seawater and may serve as useful biomonitors of anthropogenic pollution. Heavy metal concentrations of ten elements (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) of potential environmental concern were determined in seawater, sediments and twelve species of benthic marine macroalgae from four locations (Glenelg, Port Adelaide, Port Broughton and Port Pirie) along the South Australian coastline. The four sites chosen represented varying degrees of metal contamination, where the capacity for benthic macroalgae to accumulate heavy metals from the environment was evaluated. Spatial differences in heavy metal concentration in both seawaters and sediments were observed at all sites with the highest concentrations of heavy metals including Cd (125 lg g -1 ), Pb (2,425 lg g -1 ) and Zn (7,974 lg g -1 ) found in the finer sediment fractions (\250 lm) of Port Pirie. While all algal species studied (Acrosorium polyneurum, Anotrichium tenue, Cystophora Cephalornithos Cystophora monillifera, Cystophora monilliformis, Dictyopteris australis, Gelidium micropterum, Gracilaria, Hormophysa Cuneiformis, Sargassum cinctum, Scaberia agardhii and Ulva lactuca) accumulated metals to varying degrees, Blindigia marginata was a good biomonitor species for a number of metals including Cd, Co, Cr, Fe, Pb and Zn, exhibiting both relatively high total metal concentrations and significant concentration factors.

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Section: Metal Concentrations In Seawatermentioning

confidence: 99%

Metal distributions in seawater, sediment and marine benthic macroalgae from the South Australian coastline

Chakraborty

Owens

2013

Int. J. Environ. Sci. Technol.

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“…If the average Cd, Cu, Zn and Pb concentrations found in the middle and outer parts of the Corme-Laxe Ria are compared with the background values reported for the Galician rias, with typical values for the lithosphere or with uncontaminated coastal and marine sediments (table 3), it is evident that the values recorded in Corme-Laxe are lower than those previously reported for the Galician rias (Carral et al, 1995;Carballeira et al, 2000;Cobelo-García and Prego, 2003). On the other hand, these values are similar to those reported for other uncontaminated coastal systems or the lithosphere (table 3).…”

Section: Discussionmentioning

confidence: 66%

“…Si se comparan las concentraciones medias de Cd, Cu, Zn y Pb medidas en las partes media y externa de la ría de CormeLaxe con los valores reportados como naturales para las rías gallegas, los de litosfera y los de sedimentos marinos estuári-cos no contaminados (tabla 3) se observa que los valores registrados en Corme-Laxe son más bajos que los valores metálicos de fondo reportados hasta el momento para las rías gallegas (Carral et al, 1995;Carballeira et al, 2000;CobeloGarcía y Prego, 2003). Por otra parte, estos valores son comparables a las concentraciones encontradas en otras zonas costeras no contaminadas o en la litosfera (tabla 3).…”

Section: Discussionunclassified

Two opposite cases of metal accumulation in ria sediments: Ferrol and Corme-Laxe (Galicia, NW Iberian Peninsula)

2005

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Ciencias Marinas (2005) AbstractThe accumulation of heavy metals (Cd, Cu, Pb and Zn) in surface sediments (<63 µm) of the Ferrol and Corme-Laxe rias was studied. These two rias have opposite characteristics from the point of view of both the morphology and the anthropogenic impact. Low metal concentrations were found in the Corme-Laxe Ria, with the highest values observed in the Anllóns River estuary, probably due to a higher lithogenic composition of the sediments. Concentrations in the Corme-Laxe Ria (Cd, 0.10 ± 0.03 µg g -l ; Cu, 5 ± 2 µg g -l ; Pb, 12 ± 4 µg g -l ; and Zn, 49 ± 17 µg g -l ) can be used as a good reference for metal background values for sediments from the 18 Galician rias. Although these background values are lower than those previously reported for the Galician coast, they are similar to those found in other uncontaminated coastal and marine systems. The highest concentrations for Ferrol were generally found in the middle part of the ria, which receives the most important urban and industrial impact. The values obtained show evident metal contamination in the middle and inner parts of the Ferrol Ria, with enrichment factors of 4-10 for Cd, 5 for Cu, 2-3 for Pb and 4-5 for Zn.Key words: heavy metals, contamination, sediments, background values, Ferrol, Corme-Laxe, Galicia. ResumenSe estudió la acumulación de metales pesados (Cd, Cu, Pb y Zn) en el sedimento (<63 µm) superficial en las rías de Ferrol y Corme-Laxe, las cuales poseen características contrapuestas tanto desde el punto de vista de su morfología como de su influencia urbana e industrial. La ría de Corme-Laxe presentó bajos niveles de metales en los sedimentos, siendo mayores en el estuario del Río Anllóns probablemente debido a un mayor grado litogénico de los sedimentos. Las concentraciones obtenidas en la ría de Laxe (0.10 ± 0.03 µg g -l de Cd, 5 ± 2 µg g -l de Cu, 12 ± 4 µg g -l de Pb y 49 ± 17 µg g -l de Zn) resultan una buena referencia de valores naturales de fondo para metales en las 18 rías gallegas. Aunque éstos son menores a otros considerados para la costa gallega, son similares a los medidos a nivel mundial en sedimentos marinos no contaminados. En Ferrol, las máximas concentraciones de metales se presentan generalmente en la parte media de la ría, donde se localiza el mayor núcleo de población y buena parte de la actividad industrial. Los datos allí obtenidos señalan la existencia de una evidente contaminación metálica en la parte media e interna de la ría de Ferrol con factores de enriquecimiento comprendidos entre 4-10 para Cd, 5 para Cu, 2-3 para Pb y 4-5 para Zn.

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“…Regional and local BLs take into account local geochemical variability (Rubio et al, 2000a). They can be determined in sediments from the target area or from adjacent areas by different methods such as 1) determination of pre-industrial metallic levels in dated cores; 2) application of regresion techniques between a geochemically-stable element without human-influence and the rest of metals; 3) selection of pristine areas; 4) selection of the first-percentile in accumulated distributions of metal concentration; 5) determination of homogenous populations into the target data; 6) a combination of the previous procedure with modal analysis; 7) a direct comparison of polluted and nonpolluted sediments from the same study area or an adjacent area; or 8) principal component analysis (Barreiro Lozano, 1991;Carral et al, 1995aCarral et al, , 1995bChester & Voutsinou, 1981;Hakanson, 1984;Rubio et al, 2000b;Summers et al, 1996).…”

Section: Background Levelsmentioning

confidence: 99%

Trace Metals in Shallow Marine Sediments from the Ría de Vigo: Sources, Pollution, Speciation and Early Diagenesis

Álvarez-Iglesias¹,

Rubio²

2012

Geochemistry - Earth's System Processes

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Background heavy metal levels in estuarine sediments and organisms in Galicia (northwest Spain) as determined by modal analysis

Cited by 87 publications

References 31 publications

Metal distributions in seawater, sediment and marine benthic macroalgae from the South Australian coastline

Metal distributions in seawater, sediment and marine benthic macroalgae from the South Australian coastline

Two opposite cases of metal accumulation in ria sediments: Ferrol and Corme-Laxe (Galicia, NW Iberian Peninsula)

Trace Metals in Shallow Marine Sediments from the Ría de Vigo: Sources, Pollution, Speciation and Early Diagenesis

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