Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain)
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Redalyc · Ciencias Marinas
Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differential pulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenic influence: one sample was taken in the Lérez River mouth...
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| Publié dans: | Ciencias Marinas |
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Autónoma de Baja California
2003
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| _version_ | 1878325298417631232 |
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| author | A. Cobelo |
| author_facet | A. Cobelo |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) A. Cobelo R. Prego O. Nieto Ciencias de la Tierra Lead rias Galicia pollution speciation Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differentialpulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenicinfluence: one sample was taken in the Lérez River mouth (2.2-salinity) and other three samples were taken in the surroundingsof the village of Marín (salinity 3032). Lead concentrations were 0.64 nM (river sample) and 4.821.9 nM (saline samples).Speciation results showed that organic chelates of lead, 8895% of total dissolved lead, are the dominant species of the metaleven at these high concentrations. Two types of lead organic complexing ligands were detected in all samples. The riverwater sample showed the presence of a strong ligand with a concentration of ~7 nM with a conditional stabilityconstant of K´Pb-L1 ≥ 1011.1, and a weaker ligand (K´Pb-L2 = 108.2) with a concentration of 53.4 nM. The three saline samples showedsimilar behavior: a strong ligand (K´Pb-L1 ~ 108.6) with concentration ranging from 33.0 to 53.5 nM, and a weaker complexingligand (K´Pb-L2 ~ 107.5) with concentration ranging from 32.6 to 50.5 nM. All lead-organic ligand complexes (except the strongcomplex in the river water sample) showed labile behavior in the time scale of the technique. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029401 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/178 10.7773/cm.v29i4.178 |
| description | Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differential pulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenic influence: one sample was taken in the Lérez River mouth (2.2-salinity) and other three samples were taken in the surroundings of the village of Marín (salinity 30–32). Lead concentrations were 0.64 nM (river sample) and 4.8–21.9 nM (saline samples). Speciation results showed that organic chelates of lead, 88–95% of total dissolved lead, are the dominant species of the metal even at these high concentrations. Two types of lead organic complexing ligands were detected in all samples. The river water sample showed the presence of a strong ligand with a concentration of ~7 nM with a conditional stability constant of K'Pb-L1 ≥ 1011.1, and a weaker ligand (K'Pb-L2 = 108.2) with a concentration of 53.4 nM. The three saline samples showed similar behavior: a strong ligand (K'Pb-L1 ~ 108.6) with concentration ranging from 33.0 to 53.5 nM, and a weaker complexing ligand (K'Pb-L2 ~ 107.5) with concentration ranging from 32.6 to 50.5 nM. All lead-organic ligand complexes (except the strong complex in the river water sample) showed labile behavior in the time scale of the technique.
La especiación química del plomo disuelto se llevó a cabo en cuatro estaciones de muestreo en la Ría Pontevedra (NO de España) utilizando la técnica de voltametría de redisolución anódica de pulso diferencial (DPASV) con un HMDE. La zona de muestreo fue elegida en base a su clara influencia antropogénica: se tomó una muestra en la desembocadura del Río Lérez (salinidad 2.2) y las otras tres se tomaron en las proximidades de la Villa de Marín (salinidad 30–32). Las concentraciones de plomo obtenidas fueron de 0.64 nM (muestra de agua dulce) y 4.8–2.9 nM (muestras salinas). Los resultados de la especiación mostraron que los quelatos orgánicos del plomo, 88–95% del plomo disuelto total, son las especies dominantes del metal incluso a estas elevadas concentraciones. En todas las muestras se detectó la presencia de dos clases de ligandos complejantes del plomo. En la muestra de río se obtuvo un ligando complejante fuerte, de concentración ~7 nM, con una constante condicional K'Pb-L1 ≥ 1011.1, y un ligando más débil (K'Pb-L2 = 108.2) de concentración 53.4 nM. En las tres muestras de aguas salinas se obtuvieron resultados muy similares: un tipo de ligando fuerte (K'Pb-L1 ~ 108.6) con una concentracion comprendida entre 33.0 y 53.5 nM, y un tipo de ligando complejante del plomo más débil (K'Pb-L2 ~ 107.5) con concentraciones comprendidas entre 32.6 y 50.5 nM. Todos los complejos plomo-ligando orgánico (excepto el complejo fuerte de la muestra de río) mostraron un comportamiento lábil en la escala de tiempo de la técnica. |
| format | Artículo científico |
| id | redalyc_48029401 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) Especiación química del plomo disuelto en ambientes contaminados. Caso de estudio: la Ría de Pontevedra (NO España) Cobelo-García, A Prego, R Nieto, O Lead speciation pollution rias Galicia Plomo especiación contaminación rías Galicia Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differential pulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenic influence: one sample was taken in the Lérez River mouth (2.2-salinity) and other three samples were taken in the surroundings of the village of Marín (salinity 30–32). Lead concentrations were 0.64 nM (river sample) and 4.8–21.9 nM (saline samples). Speciation results showed that organic chelates of lead, 88–95% of total dissolved lead, are the dominant species of the metal even at these high concentrations. Two types of lead organic complexing ligands were detected in all samples. The river water sample showed the presence of a strong ligand with a concentration of ~7 nM with a conditional stability constant of K'Pb-L1 ≥ 1011.1, and a weaker ligand (K'Pb-L2 = 108.2) with a concentration of 53.4 nM. The three saline samples showed similar behavior: a strong ligand (K'Pb-L1 ~ 108.6) with concentration ranging from 33.0 to 53.5 nM, and a weaker complexing ligand (K'Pb-L2 ~ 107.5) with concentration ranging from 32.6 to 50.5 nM. All lead-organic ligand complexes (except the strong complex in the river water sample) showed labile behavior in the time scale of the technique. La especiación química del plomo disuelto se llevó a cabo en cuatro estaciones de muestreo en la Ría Pontevedra (NO de España) utilizando la técnica de voltametría de redisolución anódica de pulso diferencial (DPASV) con un HMDE. La zona de muestreo fue elegida en base a su clara influencia antropogénica: se tomó una muestra en la desembocadura del Río Lérez (salinidad 2.2) y las otras tres se tomaron en las proximidades de la Villa de Marín (salinidad 30–32). Las concentraciones de plomo obtenidas fueron de 0.64 nM (muestra de agua dulce) y 4.8–2.9 nM (muestras salinas). Los resultados de la especiación mostraron que los quelatos orgánicos del plomo, 88–95% del plomo disuelto total, son las especies dominantes del metal incluso a estas elevadas concentraciones. En todas las muestras se detectó la presencia de dos clases de ligandos complejantes del plomo. En la muestra de río se obtuvo un ligando complejante fuerte, de concentración ~7 nM, con una constante condicional K'Pb-L1 ≥ 1011.1, y un ligando más débil (K'Pb-L2 = 108.2) de concentración 53.4 nM. En las tres muestras de aguas salinas se obtuvieron resultados muy similares: un tipo de ligando fuerte (K'Pb-L1 ~ 108.6) con una concentracion comprendida entre 33.0 y 53.5 nM, y un tipo de ligando complejante del plomo más débil (K'Pb-L2 ~ 107.5) con concentraciones comprendidas entre 32.6 y 50.5 nM. Todos los complejos plomo-ligando orgánico (excepto el complejo fuerte de la muestra de río) mostraron un comportamiento lábil en la escala de tiempo de la técnica. 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/178 10.7773/cm.v29i4.178 Ciencias Marinas; Vol. 29 No. 4 (2003); 377-388 Ciencias Marinas; Vol. 29 Núm. 4 (2003); 377-388 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/178/153 ['Redalyc'] redalyc_48029401 Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) ['Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain)', 'A. Cobelo', 'Ciencias de la Tierra', 'Lead', 'rias', 'Galicia', 'pollution', 'speciation', 'Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) A. Cobelo R. Prego O. Nieto Ciencias de la Tierra Lead rias Galicia pollution speciation Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differentialpulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenicinfluence: one sample was taken in the Lérez River mouth (2.2-salinity) and other three samples were taken in the surroundingsof the village of Marín (salinity 30\x9632). Lead concentrations were 0.64 nM (river sample) and 4.8\x9621.9 nM (saline samples).Speciation results showed that organic chelates of lead, 88\x9695% of total dissolved lead, are the dominant species of the metaleven at these high concentrations. Two types of lead organic complexing ligands were detected in all samples. The riverwater sample showed the presence of a strong ligand with a concentration of ~7 nM with a conditional stabilityconstant of K´Pb-L1 ≥ 1011.1, and a weaker ligand (K´Pb-L2 = 108.2) with a concentration of 53.4 nM. The three saline samples showedsimilar behavior: a strong ligand (K´Pb-L1 ~ 108.6) with concentration ranging from 33.0 to 53.5 nM, and a weaker complexingligand (K´Pb-L2 ~ 107.5) with concentration ranging from 32.6 to 50.5 nM. All lead-organic ligand complexes (except the strongcomplex in the river water sample) showed labile behavior in the time scale of the technique. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029401 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'] ['A. Cobelo'] ['A. Cobelo'] ['Artículo científico'] ['2003'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'Lead', 'rias', 'Galicia', 'pollution', 'speciation'] ['https://www.redalyc.org/articulo.oa?id=48029401'] ['Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) A. Cobelo R. Prego O. Nieto Ciencias de la Tierra Lead rias Galicia pollution speciation Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differentialpulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenicinfluence: one sample was taken in the Lérez River mouth (2.2-salinity) and other three samples were taken in the surroundingsof the village of Marín (salinity 30\x9632). Lead concentrations were 0.64 nM (river sample) and 4.8\x9621.9 nM (saline samples).Speciation results showed that organic chelates of lead, 88\x9695% of total dissolved lead, are the dominant species of the metaleven at these high concentrations. Two types of lead organic complexing ligands were detected in all samples. The riverwater sample showed the presence of a strong ligand with a concentration of ~7 nM with a conditional stabilityconstant of K´Pb-L1 ≥ 1011.1, and a weaker ligand (K´Pb-L2 = 108.2) with a concentration of 53.4 nM. The three saline samples showedsimilar behavior: a strong ligand (K´Pb-L1 ~ 108.6) with concentration ranging from 33.0 to 53.5 nM, and a weaker complexingligand (K´Pb-L2 ~ 107.5) with concentration ranging from 32.6 to 50.5 nM. All lead-organic ligand complexes (except the strongcomplex in the river water sample) showed labile behavior in the time scale of the technique. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029401 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 | Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) A. Cobelo Ciencias de la Tierra Lead rias Galicia pollution speciation Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) A. Cobelo R. Prego O. Nieto Ciencias de la Tierra Lead rias Galicia pollution speciation Chemical speciation of dissolved lead was determined at four sampling sites in the Pontevedra Ría (NW Spain) by differentialpulse anodic stripping voltammetry (DPASV) with a HMDE. Sampling location was chosen due to its evident anthropogenicinfluence: one sample was taken in the Lérez River mouth (2.2-salinity) and other three samples were taken in the surroundingsof the village of Marín (salinity 3032). Lead concentrations were 0.64 nM (river sample) and 4.821.9 nM (saline samples).Speciation results showed that organic chelates of lead, 8895% of total dissolved lead, are the dominant species of the metaleven at these high concentrations. Two types of lead organic complexing ligands were detected in all samples. The riverwater sample showed the presence of a strong ligand with a concentration of ~7 nM with a conditional stabilityconstant of K´Pb-L1 ≥ 1011.1, and a weaker ligand (K´Pb-L2 = 108.2) with a concentration of 53.4 nM. The three saline samples showedsimilar behavior: a strong ligand (K´Pb-L1 ~ 108.6) with concentration ranging from 33.0 to 53.5 nM, and a weaker complexingligand (K´Pb-L2 ~ 107.5) with concentration ranging from 32.6 to 50.5 nM. All lead-organic ligand complexes (except the strongcomplex in the river water sample) showed labile behavior in the time scale of the technique. 2003 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48029401 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 | Chemical speciation of dissolved lead in polluted environments. A case of study: the Pontevedra Ria (NW Spain) |
| title_alt | Especiación química del plomo disuelto en ambientes contaminados. Caso de estudio: la Ría de Pontevedra (NO España) |
| topic | Ciencias de la Tierra Lead rias Galicia pollution speciation |
| topic_facet | Lead speciation pollution rias Galicia Plomo especiación contaminación rías |
| url | https://www.redalyc.org/articulo.oa?id=48029401 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/178 |