Mercury contamination history of an estuarine floodplain reconstructed from a 210Pb-dated sediment core (Berg River, South Africa).

Kading, T J; Mason, R P; Leaner, J J

Kading, T J; Mason, R P; Leaner, J J.

Afiliación

Kading TJ; Wesleyan University, Department of Earth and Environmental Studies, 265 Church Street Middletown, CT 06457, USA. tkading@wesleyan.edu

Mar Pollut Bull ; 59(4-7): 116-22, 2009.

Article en En | MEDLINE | ID: mdl-19321182

RESUMEN

Mercury deposition histories have been scarcely documented in the southern hemisphere. A sediment core was collected from the ecologically important estuarine floodplain of the Berg River (South Africa). We establish the concentration of Hg in this (210)Pb-dated sediment core at <50 ng g(-1) Hg(T) throughout the core, but with 1.3 ng g(-1) methylmercury in surface sediments. The (210)Pb dating of the core provides a first record of mercury deposition to the site and reveals the onset of enhanced mercury deposition in 1970. The ratio of methylmercury to total mercury is relatively high in these sediments when compared to other wetlands.

Asunto(s)

Monitoreo del Ambiente; Sedimentos Geológicos/química; Mercurio/análisis; Ríos; Contaminantes Químicos del Agua/análisis; Carbono/análisis; Inundaciones; Radioisótopos de Plomo/análisis; Compuestos de Metilmercurio/análisis; Nitrógeno/análisis; Sudáfrica

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Monitoreo del Ambiente / Sedimentos Geológicos / Ríos / Mercurio País/Región como asunto: Africa Idioma: En Revista: Mar Pollut Bull Año: 2009 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido

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