Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico

Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico

 During September and October 1995, samples of surface sediments and water were collected to develop an analytical set-up to determine the concentrations of the organic compounds known as tributyltins (TBTs), including tributyl-, dibutyl- and monobutyltin. The method was then used to measur...

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Những tác giả chính: Macías-Carranza, V, Macías-Zamora, JV, Villaescusa-Celaya, JA
Định dạng: Online
Ngôn ngữ:eng
Được phát hành: Iniversidad Autónoma de Baja California 1997
Truy cập trực tuyến:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/804
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id oai:cienciasmarinas.com.mx:article-804
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Macías-Carranza, V
Macías-Zamora, JV
Villaescusa-Celaya, JA
spellingShingle Macías-Carranza, V
Macías-Zamora, JV
Villaescusa-Celaya, JA
Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico
author_facet Macías-Carranza, V
Macías-Zamora, JV
Villaescusa-Celaya, JA
author_sort Macías-Carranza, V
title Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico
title_short Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico
title_full Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico
title_fullStr Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico
title_full_unstemmed Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico
title_sort organotin compounds in marine water and sediments from the port of ensenada, baja california, mexico
description  During September and October 1995, samples of surface sediments and water were collected to develop an analytical set-up to determine the concentrations of the organic compounds known as tributyltins (TBTs), including tributyl-, dibutyl- and monobutyltin. The method was then used to measure the levels of these contaminants in the port of Ensenada, Baja California. The method is based on hydride generation with atomic absorption detection. The concentrations determined were found to be relatively high (33 to 1021 ng g–1 of Sn in sediments and 66 to 469 ng L–1 in water samples), when compared to those obtained in similar works at San Diego Bay in California, USA. Comparisons are also made with other geographical locations. These results suggest that the port of Ensenada is an area that is receiving substantial amounts of these chemicals and might already be affecting the health of local biota. Two sources of these chemicals were identified: the activities associated with painting and cleaning of both commercial and sport boats, and the presence, at the time of the sampling, of an old platform near the entrance to the port facilities. The presence of the three compounds suggests that there is a permanent entry of these pollutants; furthermore, the presence of decreasing concentrations, starting with the more butylated compounds, suggests a recent introduction. Thc higher concentrations found in the sediment samples indicates the existence of an eflicient method of removal from the water column to the sediments of these compounds. The removal mechanism is associated with the presente of organic matter in the port area. In the sediments, the distribution of TBTs was partially dictated by the organic content, as a significant correlation (α = 0.05) between TBT concentration and organic content was found.
publisher Iniversidad Autónoma de Baja California
publishDate 1997
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/804
_version_ 1715724013654769664
spelling oai:cienciasmarinas.com.mx:article-8042019-05-22T22:20:34Z Organotin compounds in marine water and sediments from the port of Ensenada, Baja California, Mexico Compuestos organoestañados en agua y sedimentos marinos del puerto de Ensenada, Baja California, México Macías-Carranza, V Macías-Zamora, JV Villaescusa-Celaya, JA tributyltin hydride generation atomic absorption spectroscopy tributilestaño generación de hidruros espectrofotometría de absorción atómica  During September and October 1995, samples of surface sediments and water were collected to develop an analytical set-up to determine the concentrations of the organic compounds known as tributyltins (TBTs), including tributyl-, dibutyl- and monobutyltin. The method was then used to measure the levels of these contaminants in the port of Ensenada, Baja California. The method is based on hydride generation with atomic absorption detection. The concentrations determined were found to be relatively high (33 to 1021 ng g–1 of Sn in sediments and 66 to 469 ng L–1 in water samples), when compared to those obtained in similar works at San Diego Bay in California, USA. Comparisons are also made with other geographical locations. These results suggest that the port of Ensenada is an area that is receiving substantial amounts of these chemicals and might already be affecting the health of local biota. Two sources of these chemicals were identified: the activities associated with painting and cleaning of both commercial and sport boats, and the presence, at the time of the sampling, of an old platform near the entrance to the port facilities. The presence of the three compounds suggests that there is a permanent entry of these pollutants; furthermore, the presence of decreasing concentrations, starting with the more butylated compounds, suggests a recent introduction. Thc higher concentrations found in the sediment samples indicates the existence of an eflicient method of removal from the water column to the sediments of these compounds. The removal mechanism is associated with the presente of organic matter in the port area. In the sediments, the distribution of TBTs was partially dictated by the organic content, as a significant correlation (α = 0.05) between TBT concentration and organic content was found. Durante septiembre y octubre de 1995 se tomaron muestras de sedimento y agua en el puerto de Ensenada. Baja California, con el doble objetivo de desarrollar un sistema de análisis y cuantificación para compuestos organometálicos (tributil, dibutil y monobutilestaño), conocidos como TBTs (por sus siglas en inglés), y determinar los niveles de esas sustancias tóxicas en esta zona. El método desarrollado se basa en la aplicación de la técnica de generación de hidruros con detección por espectrofotometría de absorción atómica. Las concentraciones encontradas fueron relativamente altas (33 a 1021 ng g–1 de Sn en sedimento y 66 a 469 ng L–1 de Sn en agua) comparadas con valores obtenidos en trabajos similares realizados en la Bahía de San Diego, California, EUA. Estos resultados sugieren que el puerto de Ensenada es una zona que está siendo sujeta a descargas sin regulación de estos compuestos y que pudiera mostrar problemas de contaminación por compuestos organoestañados. Se identificaron dos fuentes principales de compuestos organoestañados en la zona: los astilleros, en la parte norte del puerto, y un dique flotante, cercano a la entrada de la rada. Se sugiere que el enriquecimiento de TBTs se debe a las labores de reparación de embarcaciones, que incluyen raspado y pintura, siendo éstas las actividades que aportan mayor porcentaje. La presencia de los tres compuestos organoestañados en concentraciones decrecientes a partir del tributilestaño sugiere la entrada reciente y continua de estos compuestos. Similarmente. la mayor abundancia de estos compuestos en sedimentos marinos que en el agua sugiere que existe un mecanismo eficiente de remoción de la columna de agua hacia el sedimento de estos compuestos. Se encontró una correlación lineal (α = 0.05) entre el contenido de materia orgánica y la concentración de organoestañados totales en el sedimento. La asociación con material orgánico es una variable que determinó parcialmente la distribución espacial de estos compuestos. Iniversidad Autónoma de Baja California 1997-03-06 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/804 10.7773/cm.v23i3.804 Ciencias Marinas; Vol. 23 No. 3 (1997); 377-394 Ciencias Marinas; Vol. 23 Núm. 3 (1997); 377-394 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/804/729

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