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Closed Access item Altitudinal gradients of PBDEs and PCBs in fish from European high mountain lakes
Grimalt, Joan O.
Bartrons Vilamala, Mireia
López Fernández, Jordi F.
|Keywords:||Polybromodiphenyl ethers (PBDEs), Polychlorobiphenyls (PCBs), Compound concentration, Lower temperatures, Global distillation model|
|Publisher:||American Chemical Society|
|Citation:||Environmental Science & Technology 41(7): 2196-2202 (2007)|
|Abstract:||A first case of temperature-dependent distribution of polybromodiphenyl ethers (PBDEs) in remote areas is shown. Analysis of these compounds in fish from Pyrenean lakes distributed along an altitudinal transect shows higher concentrations at lower temperatures, as predicted in the global distillation model. Conversely, no temperature-dependent distribution is observed in a similar transect in the Tatra mountains (Central Europe) nor in fish from high mountain lakes distributed throughout Europe. The fish concentrations of polychlorobiphenyls (PCBs) examined for
comparison showed significant temperature correlations in all these studied lakes. Cold trapping of both PCBs and PBDEs concerned the less volatile congeners. In the Pyrenean lake transect the concentrations of PCBs and PBDEs in fish were correlated despite the distinct use of
these compounds and their 40 year time lag of emissions to the environment. Thus, temperature effects have overcome these anthropogenic differences constituting at present the main process determining their distributions. These cases of distinct PBDEs and PCBs behavior in high mountains likely reflect early stages in the environmental distribution of the former since they have been under secondary redistribution processes over much shorter time than the latter.|
|Description:||7 pages, 4 figures.-- PMID: 17438763 [PubMed].-- Printed version published on Apr 1, 2007.|
Supplementary information (Materials and methods, Suppl. figure S1, tables S1-S4, 9 pages) available at: http://pubs.acs.org/doi/suppl/10.1021/es062197m/suppl_file/es062197msi20061218_033001.pdf
|Publisher version (URL):||http://dx.doi.org/10.1021/es062197m|
|Appears in Collections:||(IDAEA) Artículos|
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