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Título

Modelling the dynamic aire-water-sediment coupled fluxes and occurrence of polychlorinated biphenyls in a high altitude lake

AutorMeijer, Sandra N.; Dachs, Jordi CSIC ORCID; Fernández Ramón, M. Pilar CSIC ORCID; Camarero, Lluís ; Catalán, Jordi CSIC ORCID; Del Vento, Sabino CSIC; Van Drooge, Barend L. CSIC ORCID; Jurado, Elena CSIC ORCID; Grimalt, Joan O. CSIC ORCID
Palabras claveModel
PCB
Mountain lake
Biogeochemical cycles
Atmospheric deposition
Fecha de publicación1-abr-2006
EditorElsevier
CitaciónEnvironmental Pollution 140(3):546-560(2006)
ResumenThe BIODEP model in terms of atmosphere–lake interactions was developed. The model was applied to an oligotrophic, dimictic high altitude lake (Lake Redo, Pyrenees) for a range of polychlorinated biphenyl (PCB) congeners. High altitude lakes, which receive their contaminant inputs uniquely from the atmosphere through long-range atmospheric transport, provide ideal controlled environments for the study of the interactions between atmospheric depositional and water column biogeochemical processes. The BIODEP model was able to predict dissolved water concentrations and PCB accumulation in the lake sediment within a factor of 2. This shows that the BIODEP model captures the essential processes driving the sink of POPs in high altitude lakes and that POP occurrence in the lake is driven by direct atmospheric inputs with limited influence from the watershed. An important seasonal variability in water column concentrations is predicted which should have important implications in sampling strategies. Furthermore, it is shown that diffusive air–water exchange dominated the PCB dynamics in the lake, especially for the less chlorinated biphenyls
Descripción15 pages, 6 figures, 1 table.
Versión del editorhttp://dx.doi.org/10.1016/j.envpol.2005.06.015
URIhttp://hdl.handle.net/10261/11860
DOI10.1016/j.envpol.2005.06.015
ISSN0269-7491
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