PCB composition in flood material and sediments from the Guadiana River estuary

PCB composition in flood material and sediments from the Guadiana River estuary

Two months after moderate river flows, we collected 27 surface sediments from the river-estuarine system and one sediment core from the coastal area. The PCB levels in sediments were lower than 1.1 ng g–1, which is in conformity with the absence of industrial activities in the Guadiana drainage basi...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Martins, M, Ferreira, AM, Vales, C
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2005
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/87
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:cienciasmarinas.com.mx:article-87
record_format ojs
spelling oai:cienciasmarinas.com.mx:article-872019-04-27T00:49:26Z PCB composition in flood material and sediments from the Guadiana River estuary Composición de PCB en el material y los sedimentos de inundación del estuario del Río Guadiana Martins, M Ferreira, AM Vales, C PCB congeners sediments flood material Guadiana River PCB congéneres sedimentos material de inundación Río Guadiana Two months after moderate river flows, we collected 27 surface sediments from the river-estuarine system and one sediment core from the coastal area. The PCB levels in sediments were lower than 1.1 ng g–1, which is in conformity with the absence of industrial activities in the Guadiana drainage basin. Material transported by the flood contained higher PCB concentrations (0.8–1.8 ng g–1) than surface sediments (0.1–1.1 ng g–1), indicating the importance of these events in the transport of PCB to this low-contaminated estuarine system. These differences were not related to organic carbon content. Furthermore, this material is enriched in less chlorinated compounds as usually occurs far away from point sources. The diffuse transport influences the CB composition of sediment deposits on the adjacent coast, as revealed by variations in the depth profiles of the tri-/hexa-chlorinated ratio, organic carbon content and Si/Al ratio. Se analizaron el material grueso y las partículas recién depositadas transportadas por la inundación excepcional de enero de 2001 en ocho puntos del Río Guadiana y los márgenes del estuario. Después de dos meses de caudal moderado, se recolectaron 27 muestras de sedimento superficial en el sistema fluvial-estuarino y un core de sedimento en la zona costera. Los niveles de PCB en los sedimentos estuvieron por debajo de 1.1 ng g–1, lo cual concuerda con la ausencia de actividades industriales en la cuenca hidrográfica del Guadiana. Las concentraciones de PCB fueron mayores en el material transportado por la inundación (0.8–1.8 ng g–1) que en los sedimentos superficiales (0.1–1.1 ng g–1), lo que demuestra la importancia de estos eventos en el transporte de PCB a este sistema estuarino poco contaminado. Estas diferencias no se relacionaron con el contenido de carbono orgánico. Además, este material se encuentra enriquecido de compuestos menos clorados como es usual en lugares alejados de las fuentes puntuales. El transporte difuso afecta la composición de bifenilos clorados de los sedimentos depositados en la costa adyacente, según muestran las variaciones de la relación triclorados/hexaclorados, el contenido de carbono orgánico y la relación Si/Al, en los perfiles de profundidad. Coarse material and freshly deposited particles transported by the exceptional flood of January 2001 were sampled at eight sites along the Guadiana River and estuarine shorelines. 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/87 10.7773/cm.v31i12.87 Ciencias Marinas; Vol. 31 No. 1B (2005); 285-291 Ciencias Marinas; Vol. 31 Núm. 1B (2005); 285-291 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/87/67
institution Ciencias Marinas
collection OJS
language eng
format Online
author Martins, M
Ferreira, AM
Vales, C
spellingShingle Martins, M
Ferreira, AM
Vales, C
PCB composition in flood material and sediments from the Guadiana River estuary
author_facet Martins, M
Ferreira, AM
Vales, C
author_sort Martins, M
title PCB composition in flood material and sediments from the Guadiana River estuary
title_short PCB composition in flood material and sediments from the Guadiana River estuary
title_full PCB composition in flood material and sediments from the Guadiana River estuary
title_fullStr PCB composition in flood material and sediments from the Guadiana River estuary
title_full_unstemmed PCB composition in flood material and sediments from the Guadiana River estuary
title_sort pcb composition in flood material and sediments from the guadiana river estuary
description Two months after moderate river flows, we collected 27 surface sediments from the river-estuarine system and one sediment core from the coastal area. The PCB levels in sediments were lower than 1.1 ng g–1, which is in conformity with the absence of industrial activities in the Guadiana drainage basin. Material transported by the flood contained higher PCB concentrations (0.8–1.8 ng g–1) than surface sediments (0.1–1.1 ng g–1), indicating the importance of these events in the transport of PCB to this low-contaminated estuarine system. These differences were not related to organic carbon content. Furthermore, this material is enriched in less chlorinated compounds as usually occurs far away from point sources. The diffuse transport influences the CB composition of sediment deposits on the adjacent coast, as revealed by variations in the depth profiles of the tri-/hexa-chlorinated ratio, organic carbon content and Si/Al ratio.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/87
_version_ 1715723932866183168

Ejemplares similares