Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile

The present study determined the main sources of Zn enrichment at the head of Aysén Fjord. The study considered the analysis of the river sediments that enter the fjord (fluvial record), the marine sediments at the head of the fjord (estuarine area record), and the sediments from stations along the...

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Autores principales:	Ahumada,Ramón, González,Elizabeth, Medina,Valentina, Rudolph,Anny
Lenguaje:	English
Publicado:	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso 2007
Materias:	estuaries sediments Zn anodic redissolving voltammetry Aysén Fjord
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200001
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spelling	oai:scielo:S0717-717820070002000012008-01-31Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, ChileAhumada,RamónGonzález,ElizabethMedina,ValentinaRudolph,Anny estuaries sediments Zn anodic redissolving voltammetry Aysén Fjord The present study determined the main sources of Zn enrichment at the head of Aysén Fjord. The study considered the analysis of the river sediments that enter the fjord (fluvial record), the marine sediments at the head of the fjord (estuarine area record), and the sediments from stations along the fjord (horizontal concentration gradient). The Zn content was analyzed, as were Cd, Cu, and Pb as references. A different chemical attack was performed in order to estimate the total Zn and a sequential extraction techniques to estimate the "species" or fractions. The quantification was done using a polarographic analyzer (POL 150) coupled to a Trace Lab 50TM with square wave voltammetry and standard addition. Moreover, the sediment grain size, total organic matter, total organic carbon, and total phosphorus were analyzed. The results confirmed the highest zinc concentrations in the surface sediments at the head of the fjord. The profiles showed the highest concentrations of Zn at the surface. The fractional chemical attack indicated that residual Zn (60-80%) was the most abundant fraction. The Zn fractions associated with oxy-hydroxides and organo-metallics were similar (10-20%) and greater than the exchangeable fractions (5-10%). The residual Zn was associated with the lithogenic fraction and the rest corresponded to fluvial contributions main baseline components, whereas the remaining inflow corresponded to contributions associated with fluvial, advective, and anthropogenic components at the head of the fjord. The identification of the sources of Zn enrichment provides information relevant for implementing management policies to protect the area and indicates the changes due to anthropogenic sourcesinfo:eu-repo/semantics/openAccessEscuela de Ciencias del Mar. Pontificia Universidad Católica de ValparaísoInvestigaciones marinas v.35 n.2 20072007-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200001en10.4067/S0717-71782007000200001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	estuaries sediments Zn anodic redissolving voltammetry Aysén Fjord
spellingShingle	estuaries sediments Zn anodic redissolving voltammetry Aysén Fjord Ahumada,Ramón González,Elizabeth Medina,Valentina Rudolph,Anny Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile
description	The present study determined the main sources of Zn enrichment at the head of Aysén Fjord. The study considered the analysis of the river sediments that enter the fjord (fluvial record), the marine sediments at the head of the fjord (estuarine area record), and the sediments from stations along the fjord (horizontal concentration gradient). The Zn content was analyzed, as were Cd, Cu, and Pb as references. A different chemical attack was performed in order to estimate the total Zn and a sequential extraction techniques to estimate the "species" or fractions. The quantification was done using a polarographic analyzer (POL 150) coupled to a Trace Lab 50TM with square wave voltammetry and standard addition. Moreover, the sediment grain size, total organic matter, total organic carbon, and total phosphorus were analyzed. The results confirmed the highest zinc concentrations in the surface sediments at the head of the fjord. The profiles showed the highest concentrations of Zn at the surface. The fractional chemical attack indicated that residual Zn (60-80%) was the most abundant fraction. The Zn fractions associated with oxy-hydroxides and organo-metallics were similar (10-20%) and greater than the exchangeable fractions (5-10%). The residual Zn was associated with the lithogenic fraction and the rest corresponded to fluvial contributions main baseline components, whereas the remaining inflow corresponded to contributions associated with fluvial, advective, and anthropogenic components at the head of the fjord. The identification of the sources of Zn enrichment provides information relevant for implementing management policies to protect the area and indicates the changes due to anthropogenic sources
author	Ahumada,Ramón González,Elizabeth Medina,Valentina Rudolph,Anny
author_facet	Ahumada,Ramón González,Elizabeth Medina,Valentina Rudolph,Anny
author_sort	Ahumada,Ramón
title	Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile
title_short	Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile
title_full	Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile
title_fullStr	Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile
title_full_unstemmed	Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile
title_sort	analysis of mayor zinc sources in marine sediments of the estuarine zone in ay sen fjord, chile
publisher	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200001
work_keys_str_mv	AT ahumadaramon analysisofmayorzincsourcesinmarinesedimentsoftheestuarinezoneinaysenfjordchile AT gonzalezelizabeth analysisofmayorzincsourcesinmarinesedimentsoftheestuarinezoneinaysenfjordchile AT medinavalentina analysisofmayorzincsourcesinmarinesedimentsoftheestuarinezoneinaysenfjordchile AT rudolphanny analysisofmayorzincsourcesinmarinesedimentsoftheestuarinezoneinaysenfjordchile
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Analysis of mayor zinc sources in marine sediments of the estuarine zone in Ay sen Fjord, Chile

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