Long-range atmospheric transport of persistent organic pollutants to remote lacustrine environments
| Autor: | Federico Páez-Osuna, Jose L. Sericano, Libia Hascibe Pérez-Bernal, Jorge Feliciano Ontiveros-Cuadras, Robert B. Dunbar, Joan-Albert Sanchez-Cabeza, Ana Carolina Ruiz-Fernández, David A. Mucciarone, Laval Liong Wee Kwong |
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| Rok vydání: | 2014 |
| Předmět: |
Pollutant
Air Pollutants Environmental Engineering Atmosphere Range (biology) Sediment Contamination Polychlorinated Biphenyls complex mixtures Pollution Lakes Soil Environmental chemistry Soil water Halogenated Diphenyl Ethers Environmental Chemistry Environmental science Environmental Pollutants Polycyclic Aromatic Hydrocarbons Surface runoff Waste Management and Disposal Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Science of The Total Environment. 493:505-520 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2014.05.002 |
| Popis: | Concentrations, temporal trends and fluxes of persistent organic pollutants (POPs: PAHs, PCBs and PBDEs) were determined in soil and (210)Pb-dated sediment cores from remote lacustrine environments (El Tule and Santa Elena lakes) in rural areas of Central Mexico. In both areas, the concentrations of target analytes in soil and sediment samples were comparable and indicative of slightly contaminated environments. The prevalence of low-molecular-weight PAHs in soils suggested their mainly atmospheric origin, in contrast to the aquatic sediments where runoff contribution was also significant. Increasing contamination trends of PCBs and PBDEs were evident, showing maximum fluxes of 4.8 ± 2.1 and 0.3 ± 0.1 ng cm(-2) a(-1) for PCBs and PBDEs, respectively. The predominance of lower-brominated PBDEs and lower-chlorinated PCBs in soils and sediments indicated that their presence is mostly due to long-range atmospheric transport. |
| Databáze: | OpenAIRE |
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