Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)

Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)

Concentrations of surfactants and persistent organic pollutants have been determined in coastal marine sediments (Cádiz Bay, SW Spain) from two areas affected by different contamination sources and levels: a tidal channel (Sancti Petri Channel) subjected to the discharge of untreated urban effluents...

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Hlavní autoři: Lara-Martín, PA, Gómez-Parra, A, Petrovic, M, Barceló, D, González-Mazo, E
Médium: Online
Jazyk:eng
Vydáno: Iniversidad Autónoma de Baja California 2005
On-line přístup:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/95
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spelling oai:cienciasmarinas.com.mx:article-952019-04-25T23:14:06Z Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain) Distribución de contaminantes orgánicos en se dimentos costeros de la Bahía de Cádiz (SO de España) Lara-Martín, PA Gómez-Parra, A Petrovic, M Barceló, D González-Mazo, E marine sediments bay surfactants PCBs PAHs organochlorines sedimentos marinos bahía tensioactivos PCBs PAHs organoclorados Concentrations of surfactants and persistent organic pollutants have been determined in coastal marine sediments (Cádiz Bay, SW Spain) from two areas affected by different contamination sources and levels: a tidal channel (Sancti Petri Channel) subjected to the discharge of untreated urban effluents, and an estuarine zone (Guadalete River) subjected to the occasional discharge of effluents from agriculture and from an urban and industrial wastewater treatment plant. Linear alkylbenzene sulfonates (LAS), nonylphenol polyethoxylates (NPEOs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorinated pesticides were determined by an analytical procedure based on the use of an accelerated solvent extraction unit, a preconcentration and cleaning stage using solid phase extraction, and later quantification by LC/MS and GC/MS. In general, the highest concentrations were found in surface sediments near the untreated urban effluent, with levels above 80 mg kg–1 for LAS, 200 µg kg–1 for PAHs, and 10 and 50 µg kg–1 for PCBs and DDT, respectively. Also observed was a decrease in the concentrations of the compounds with the depth of the sediment, with the exception of PAHs and PCBs, which show a maximum at 25–30 cm. In the area subjected to agricultural and wastewater treatment plant effluents, high levels of NPEOs (122 mg kg–1) and DDT (63 mg kg–1) were recorded as a result of their industrial and agricultural uses, respectively. Se han determinado las concentraciones de tensioactivos y compuestos orgánicos persistentes en sedimentos costeros (Bahía de Cádiz, SO de España) procedentes de dos zonas sometidas a distintos origen y grado de contaminación: un caño mareal (caño de Sancti Petri) en el cual se produce una descarga constante de aguas residuales urbanas sin tratamiento, y una zona estuárica (Río Guadalete) sometida a vertidos ocasionales de carácter agrícola y al efluente de una planta de tratamiento de aguas residuales urbanas e industriales. La determinación de sulfonato de alquilbenceno lineal (LAS), nonilfenol polietoxilados (NPEOs), hidrocarburos aromáticos policíclicos (PAHs), bifenilos policlorados (PCBs) y pesticidas organoclorados ha sido realizada por medio de un procedimiento analítico basado en el empleo de una unidad de extracción acelerada con disolventes (ASE), una etapa de purificación y preconcentración por fase sólida (SPE), y su posterior cuantificación por LC/MS y GC/MS. En general, las concentraciones más elevadas han sido encontradas en los sedimentos superficiales cercanos al vertido de aguas residuales urbanas sin depurar, con valores superiores a 80 mg kg–1 para el caso de LAS, de 200 µg kg–1 para los PAHs, y de 10 y 50 µg kg–1 para los PCBs y DDT, respectivamente. También se observa un descenso en la concentración de los compuestos con la profundidad del sedimento, a excepción de los PAHs y PCBs que presentan un máximo a unos 25–30 cm de profundidad. La zona sometida a vertidos de origen agrícola y al efluente de la depuradora muestra valores elevados para NPEOs (122 mg kg–1) y DDT (63 mg kg–1) como consecuencia de sus usos industrial y agrícola, respectivamente. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/95 10.7773/cm.v31i12.95 Ciencias Marinas; Vol. 31 No. 1B (2005); 203-212 Ciencias Marinas; Vol. 31 Núm. 1B (2005); 203-212 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/95/75
institution Ciencias Marinas
collection OJS
language eng
format Online
author Lara-Martín, PA
Gómez-Parra, A
Petrovic, M
Barceló, D
González-Mazo, E
spellingShingle Lara-Martín, PA
Gómez-Parra, A
Petrovic, M
Barceló, D
González-Mazo, E
Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)
author_facet Lara-Martín, PA
Gómez-Parra, A
Petrovic, M
Barceló, D
González-Mazo, E
author_sort Lara-Martín, PA
title Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)
title_short Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)
title_full Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)
title_fullStr Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)
title_full_unstemmed Distribution of organic pollutants in coastal sediments of Cádiz Bay (SW Spain)
title_sort distribution of organic pollutants in coastal sediments of cádiz bay (sw spain)
description Concentrations of surfactants and persistent organic pollutants have been determined in coastal marine sediments (Cádiz Bay, SW Spain) from two areas affected by different contamination sources and levels: a tidal channel (Sancti Petri Channel) subjected to the discharge of untreated urban effluents, and an estuarine zone (Guadalete River) subjected to the occasional discharge of effluents from agriculture and from an urban and industrial wastewater treatment plant. Linear alkylbenzene sulfonates (LAS), nonylphenol polyethoxylates (NPEOs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorinated pesticides were determined by an analytical procedure based on the use of an accelerated solvent extraction unit, a preconcentration and cleaning stage using solid phase extraction, and later quantification by LC/MS and GC/MS. In general, the highest concentrations were found in surface sediments near the untreated urban effluent, with levels above 80 mg kg–1 for LAS, 200 µg kg–1 for PAHs, and 10 and 50 µg kg–1 for PCBs and DDT, respectively. Also observed was a decrease in the concentrations of the compounds with the depth of the sediment, with the exception of PAHs and PCBs, which show a maximum at 25–30 cm. In the area subjected to agricultural and wastewater treatment plant effluents, high levels of NPEOs (122 mg kg–1) and DDT (63 mg kg–1) were recorded as a result of their industrial and agricultural uses, respectively.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/95
_version_ 1715723933890641920

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