One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)

One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)

The Sagua la Grande River is the largest of northern Cuba. The socioeconomic development in this region during the last 100 years has caused changes in its natural conditions, such as an increase in Hg levels. In 1981, a chlor-alkali plant with mercury-cell technology was built on the river bank and...

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Autores principales: Díaz-Asencio, Misael, Sanchez-Cabeza, Joan Albert, Bolaños-Álvarez, Yoelvis, Ruíz-Fernández, Ana Carolina, Gómez-Batista, Miguel, Morabito, Roberto, Alonso-Hernandez, Carlos
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Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2015
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2472
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spelling repositorioinstitucional-20.500.12930-74722023-05-09T14:30:58Z One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba) Un siglo de sedimentación y contaminación por Hg en la desembocaduradel río Sagua la Grande (Cuba) Díaz-Asencio, Misael Sanchez-Cabeza, Joan Albert Bolaños-Álvarez, Yoelvis Ruíz-Fernández, Ana Carolina Gómez-Batista, Miguel Morabito, Roberto Alonso-Hernandez, Carlos The Sagua la Grande River is the largest of northern Cuba. The socioeconomic development in this region during the last 100 years has caused changes in its natural conditions, such as an increase in Hg levels. In 1981, a chlor-alkali plant with mercury-cell technology was built on the river bank and has released several contaminants to the environment. Sedimentation along the river and the nearby coastal zone was reconstructed using the radionuclides 210Pb, 226Ra, 137Cs, and 239,240Pu in sediment cores. The changes in sediment accumulation were related to important changes in the river basin after 1950, such as the channeling of the river in 1955 and the construction of the Alacranes Dam in 1972. Maximum sediment accumulation rates were attributed to large floods in 1933, 1948, and 1985 (Hurricane Kate). The 210Pb chronology allowed the reconstruction of Hg pollution during the last four decades. In the locations with greatest fluvial influence, Hg concentrations increased since the early 1980s exceeding the Effects Range-Median (0.71 mg kg–1). The accumulated Hg inventories released from the plant were one order of magnitude larger than those due to other sources. These results show the impact of Hg releases from this industry on the estuary, especially in the coastal zone close to the river mouth.  El río Sagua la Grande es el más grande y caudaloso de la vertiente norte de Cuba. El desarrollo socioeconómico ocurrido en esta región durante los últimos 100 años ha provocado cambios en sus condiciones naturales, como el incremento en los niveles de contaminación por Hg. En 1981, se instaló en la ribera del río una planta de cloro-sosa con celdas de mercurio, la cual ha liberado residuos al ambiente. Para estudiar los cambios sedimentarios y los procesos de contaminación por Hg en el río y la zona costera, se analizaron los radionúclidos 210Pb, 226Ra, 137Cs y 239,240Pu en núcleos sedimentarios. Los cambios en la acumulación de sedimentos fueron relacionados con modificaciones importantes realizadas en la cuenca después de 1950, como la canalización de la desembocadura del río en 1955 y la construcción del embalse Alacranes en 1972. Las tasas máximas de acumulación de sedimentos se atribuyeron a grandes inundaciones ocurridas en 1933, 1948 y 1985 (huracán Kate). La cronología obtenida con 210Pb permitió reconstruir la contaminación por Hg durante las últimas cuatro décadas. En los sitios con mayor influencia fluvial se observó un incremento en las concentraciones de Hg a partir del inicio de la década de 1980, que superó el Rango de Efectos-Mediana (0.71 mg kg–1). Los inventarios de mercurio acumulados por las liberaciones de la planta superaron en un orden de magnitud a aquellos debidos a otras fuentes. Estos resultados demuestran el impacto de las descargas de Hg de esta industria en el estuario, especialmente en la zona costera cerca de la desembocadura del río. 2015-03-05 2021-06-03T03:55:24Z 2021-06-03T03:55:24Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2472 10.7773/cm.v40i4.2472 https://hdl.handle.net/20.500.12930/7472 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2472/1540 Copyright (c) 2015 Ciencias Marinas application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 40 No. 4 (2014); 321-337 Ciencias Marinas; Vol. 40 Núm. 4 (2014); 321-337 2395-9053 0185-3880
institution Repositorio Institucional
collection DSpace
language eng
description The Sagua la Grande River is the largest of northern Cuba. The socioeconomic development in this region during the last 100 years has caused changes in its natural conditions, such as an increase in Hg levels. In 1981, a chlor-alkali plant with mercury-cell technology was built on the river bank and has released several contaminants to the environment. Sedimentation along the river and the nearby coastal zone was reconstructed using the radionuclides 210Pb, 226Ra, 137Cs, and 239,240Pu in sediment cores. The changes in sediment accumulation were related to important changes in the river basin after 1950, such as the channeling of the river in 1955 and the construction of the Alacranes Dam in 1972. Maximum sediment accumulation rates were attributed to large floods in 1933, 1948, and 1985 (Hurricane Kate). The 210Pb chronology allowed the reconstruction of Hg pollution during the last four decades. In the locations with greatest fluvial influence, Hg concentrations increased since the early 1980s exceeding the Effects Range-Median (0.71 mg kg–1). The accumulated Hg inventories released from the plant were one order of magnitude larger than those due to other sources. These results show the impact of Hg releases from this industry on the estuary, especially in the coastal zone close to the river mouth. 
format info:eu-repo/semantics/article
author Díaz-Asencio, Misael
Sanchez-Cabeza, Joan Albert
Bolaños-Álvarez, Yoelvis
Ruíz-Fernández, Ana Carolina
Gómez-Batista, Miguel
Morabito, Roberto
Alonso-Hernandez, Carlos
spellingShingle Díaz-Asencio, Misael
Sanchez-Cabeza, Joan Albert
Bolaños-Álvarez, Yoelvis
Ruíz-Fernández, Ana Carolina
Gómez-Batista, Miguel
Morabito, Roberto
Alonso-Hernandez, Carlos
One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)
author_facet Díaz-Asencio, Misael
Sanchez-Cabeza, Joan Albert
Bolaños-Álvarez, Yoelvis
Ruíz-Fernández, Ana Carolina
Gómez-Batista, Miguel
Morabito, Roberto
Alonso-Hernandez, Carlos
author_sort Díaz-Asencio, Misael
title One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)
title_short One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)
title_full One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)
title_fullStr One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)
title_full_unstemmed One century of sedimentation and Hg pollution at the mouth of the Sagua la Grande River (Cuba)
title_sort one century of sedimentation and hg pollution at the mouth of the sagua la grande river (cuba)
publisher Iniversidad Autónoma de Baja California
publishDate 2015
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2472
_version_ 1792610586563969024

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