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https://repositorio.ufba.br/handle/ri/4845
metadata.dc.type: | Artigo de Periódico |
Título : | The attenuation of concentrations model: a new method for assessing mercury mobility in sediments |
Otros títulos : | Química Nova |
Autor : | Wasserman, Julio Cesar de Faria Alvim Queiroz, Everaldo Lima de |
metadata.dc.creator: | Wasserman, Julio Cesar de Faria Alvim Queiroz, Everaldo Lima de |
Resumen : | In this work we propose a new approach for the determination of the mobility of mercury in sediments based on spatial distribution of concentrations. We chose the Tainheiros Cove, located in the Todos os Santos Bay, Brazil, as the study area, for it has a history of mercury contamination due to a chloro-alkali plant that was active during 12 years. Twenty-six surface sediment samples were collected from the area and mercury concentrations were measured by cold vapour atomic absorption spectrophotometry. A contour map was constructed from the results, indicating that mercury accumulated in a "hot spot" where concentrations reach more than 1 µg g-1. The model is able to estimate mobility of mercury in the sediments based on the distances between iso-concentration contours that determines an attenuation of concentrations factor. Values of attenuation ranged between 0.0729 (East of the hot spot, indicating higher mobility) to 0.7727 (North of the hot spot, indicating lower mobility). |
Palabras clave : | Mercury Mobility Sediments |
URI : | http://www.repositorio.ufba.br/ri/handle/ri/4845 |
Fecha de publicación : | 2004 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Biologia) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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18802.pdf | 453,65 kB | Adobe PDF | Visualizar/Abrir |
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