Behaviour of hexachlorocyclohexane isomers and Zn,Cu and Cd in the freshwater-seawater mixing area |
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| Authors: | JoséLuis Sericano Horacio V Zubillaga Adán E Pucci |
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| Institution: | Marine Chemistry Laboratory, Instituto Argentino de Oceanografía, 8.000 Bahía Blanca, Buenos Aires, Argentina |
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| Abstract: | Dissolved and suspended concentrations of hexachlorocyclohexane isomers, α, γ and δ HCH, and Zn, Cu and Cd have been measured in the Napostá Grande stream, located in the Blance Bay area, Argentina, for the purpose of studying the behaviour of these compounds in the freshwater-seawater mixing zone. The aim was to establish the mobilization processes, according to their distribution over the dissolved and suspended forms, in order to obtain a better understanding of their impact on organochlorine and heavy metal levels in the marine environment. It is concluded that the compounds studied are removed from solution by suspended matter which is afterwards precipitated during the freshwater-seawater mixing process. Seawater and surface sediment concentrations of these pollutants for two sampling sites in Blanca Bay, Argentina, are also reported. |
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