Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz

Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz

The spatial distribution of linear alkylbenzene sulfonates (LAS) and their composition of homologues in sediments of Cádiz Bay, a semienclosed system surrounded by urbanized areas, has been studied. LAS homologues were measured in marine sediments using solid-phase extraction and reversed-phase high...

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Những tác giả chính: González-Mazo, E, Quiroga, JM, Gómez-Parra, A
Định dạng: Online
Ngôn ngữ:eng
Được phát hành: Iniversidad Autónoma de Baja California 1999
Truy cập trực tuyến:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/717
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spelling oai:cienciasmarinas.com.mx:article-7172019-05-17T17:02:01Z Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz Alquilbenceno lineal sulfonatos (LAS) como trazadores de aguas residuales urbanas en un ecosistema litoral poco profundo: Un caso de estudio en la Bahía de Cádiz González-Mazo, E Quiroga, JM Gómez-Parra, A LAS distribution marine sediments tracer LAS distribución sedimentos marinos trazador The spatial distribution of linear alkylbenzene sulfonates (LAS) and their composition of homologues in sediments of Cádiz Bay, a semienclosed system surrounded by urbanized areas, has been studied. LAS homologues were measured in marine sediments using solid-phase extraction and reversed-phase high-perfomance liquid chromatography with spectrofluorimetric detection. Results showed that LAS, principally associated with solids in suspension and originating from the existing outlet where urban waste waters are discharged into the Sancti Petri Channel, are transported to Cádiz Bay during the ebb tide or emptying phase. The transport of solids in suspension is defined by the circulation of tidal currents and its sedimentation will be encouraged in those zones where the water has a long residence time, zones of low energy, where the accumulation of the surfactant takes place. These results enable the area of influence of the urban waste water discharge to be determined. The distribution of the various LAS homologues in the sediment samples is different from that of the commercial LAS. The greater the distance from the discharge point, the smaller the quantities of the long-chain homologues. Ha sido estudiada la distribución espacial de alquilbenceno lineal sulfonatos (LAS) y su composición de homólogos en sedimentos de la Bahía de Cádiz, un sistema semicerrado rodeado por áreas urbanizadas. Los homólogos del LAS fueron medidos en sedimentos marinos usando extracción en fase sólida seguida por cromatografía líquida en fase reversa con detector de fluorescencia. Los resultados mostraron que el LAS, asociado en su mayor parte con los sólidos en suspensión y que procede del vertido de aguas residuales urbanas sin tratar existente en el caño de Sancti Petri, es transportado a la Bahía de Cádiz durante el reflujo o vaciante. El transporte de los sólidos en supensión viene definido por la circulación de las corrientes de marea y su sedimentación se verá favorecida en aquellas zonas en las que el agua presente un elevado tiempo de residencia, zonas de baja energía, donde la acumulación del tensioactivo tiene lugar. Estos resultados permiten conocer la zona de influencia del vertido urbano utilizando al LAS como trazador. La distribución de los distintos homólogos del LAS en las muestras de sedimento es distinta a la del LAS comercial. A medida que la distancia al punto de vertido aumenta, la cantidad de homólogos de cadena larga que accede al sedimento es menor. Iniversidad Autónoma de Baja California 1999-03-06 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/717 10.7773/cm.v25i3.717 Ciencias Marinas; Vol. 25 No. 3 (1999); 367-379 Ciencias Marinas; Vol. 25 Núm. 3 (1999); 367-379 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/717/645
institution Ciencias Marinas
collection OJS
language eng
format Online
author González-Mazo, E
Quiroga, JM
Gómez-Parra, A
spellingShingle González-Mazo, E
Quiroga, JM
Gómez-Parra, A
Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz
author_facet González-Mazo, E
Quiroga, JM
Gómez-Parra, A
author_sort González-Mazo, E
title Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz
title_short Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz
title_full Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz
title_fullStr Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz
title_full_unstemmed Linear alkylbenzene sulfonates (LAS) as tracers of urban waste waters in shallow littoral ecosystems: A case study in the Bay of Cádiz
title_sort linear alkylbenzene sulfonates (las) as tracers of urban waste waters in shallow littoral ecosystems: a case study in the bay of cádiz
description The spatial distribution of linear alkylbenzene sulfonates (LAS) and their composition of homologues in sediments of Cádiz Bay, a semienclosed system surrounded by urbanized areas, has been studied. LAS homologues were measured in marine sediments using solid-phase extraction and reversed-phase high-perfomance liquid chromatography with spectrofluorimetric detection. Results showed that LAS, principally associated with solids in suspension and originating from the existing outlet where urban waste waters are discharged into the Sancti Petri Channel, are transported to Cádiz Bay during the ebb tide or emptying phase. The transport of solids in suspension is defined by the circulation of tidal currents and its sedimentation will be encouraged in those zones where the water has a long residence time, zones of low energy, where the accumulation of the surfactant takes place. These results enable the area of influence of the urban waste water discharge to be determined. The distribution of the various LAS homologues in the sediment samples is different from that of the commercial LAS. The greater the distance from the discharge point, the smaller the quantities of the long-chain homologues.
publisher Iniversidad Autónoma de Baja California
publishDate 1999
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/717
_version_ 1715724002352168960

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