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dc.contributor.authorBartrons, Mireia-
dc.contributor.authorGrimalt, Joan O.-
dc.contributor.authorCatalán, Jordi-
dc.identifier.citationEnvironmental Pollution 159 (7): 1816-1822 (2011)es_ES
dc.description24 páginas, 3 tablas, 4 figuras.es_ES
dc.description.abstractThe present study shows the occurrence of 2,2′,3,3′,4,4′,5,5′,6,6′-decabromodiphenyl ether (BDE-209) in microbial biofilms of Pyrenean and Tatra high mountain lakes despite its low vapor pressure and high hydrophobicity. Aerosol air transport is therefore a feasible mechanism for BDE-209 accumulation in sites up to 2688 m above sea level. This compound and other PBDEs exhibit altitudinally-dependent distribution involving higher concentrations with increasing mountain lake elevation. However, the apparently very high enthalpies of the concentration gradients observed, including BDE-209, suggest that bacterial anaerobic debromination also plays a significant role in the resulting altitudinal distributions. This microbial mechanism explains the relative abundances of PBDEs and their within lake differences between rocky and sediment microbial biofilms, thereby showing that the altitudinal pattern observed is not purely due to water temperature control on bacterial activity but also to changes in the availability of anaerobic microenvironments which increase with increasing lake productivity at lower altitudes. Capsule: Decabromodiphenyl ether and the other polybromodiphenyl congeners show vertical distributions in high mountains due to temperature effects and microbial degradation.es_ES
dc.description.sponsorshipThis work has been supported by the EU Projects Euro-Limpacs (GOCE-CT-2003- 505540) and ArcRisk (FP7-ENV-2008-1-226534), Spanish MEC project Trazas (CGL2004-02989) and Consolider Ingenio “GRACCIE” program (CSD2007-00067). Technical assistance in instrumental analysis by R. Chaler, D. Fanjul, and R. Mas, analytical advice by J. López and P. Fernández, field help by L. Camarero, M. Bacardit, G. Mendoza, E. Gallego, and S. Jarque is acknowledged. One of the authors, M.B., thanks a FPU grant of the Spanish Ministry of Education and Science.es_ES
dc.subjectpolybromodiphenyl etherses_ES
dc.subjectorganohalogen compoundses_ES
dc.subjecthigh mountainses_ES
dc.subjecttemperature dependencees_ES
dc.subjectmicrobial biofilmses_ES
dc.subjectlong range transportes_ES
dc.titleAltitudinal distributions of BDE-209 and other polybromodiphenyl ethers in high mountain lakeses_ES
dc.description.peerreviewedPeer reviewedes_ES
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Table 3 bartrons et al.docTabla 357 kBMicrosoft WordView/Open
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