title: Long-range atmospheric transport of persistent organic pollutants to remote lacustrine environments.
abstract: 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.
authors: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000 Mazatlán, Mexico. Electronic address: caro@ola.icmyl.unam.mx.
authors: Ana Carolina
authors: AC
authors: Ruiz-Fernández
authors: Universidad Nacional Autónoma de México, Posgrado en Ciencias del Mar y Limnología, Circuito Exterior s/n, Ciudad Universitaria, 04510 México D. F., Mexico. Electronic address: jontiveros@ola.icmyl.unam.mx.
authors: Jorge Feliciano
authors: JF
authors: Ontiveros-Cuadras
authors: Geochemical and Environmental Research Group, Texas A&M University, 833 Graham Road, College Station, TX 77845, USA. Electronic address: jlsericano@geos.tamu.edu.
authors: José L
authors: JL
authors: Sericano
authors: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Procesos Oceánicos y Costeros, Circuito Exterior s/n, Ciudad Universitaria, 04510 México D. F., Mexico. Electronic address: jasanchez@cmarl.unam.mx.
authors: Joan-Albert
authors: JA
authors: Sanchez-Cabeza
authors: Environment Laboratories, International Atomic Energy Agency, 4 Quai Antoine Premier, MC98000 Monaco. Electronic address: L.Liong@iaea.org.
authors: Laval
authors: L
authors: Liong Wee Kwong
authors: Department of Environmental Earth System Science, Stanford University, Stanford, CA 94305-4216, USA. Electronic address: dunbar@stanford.edu.
authors: Robert B
authors: RB
authors: Dunbar
authors: Department of Environmental Earth System Science, Stanford University, Stanford, CA 94305-4216, USA. Electronic address: dam1@stanford.edu.
authors: David A
authors: DA
authors: Mucciarone
authors: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000 Mazatlán, Mexico. Electronic address: libia@ola.icmyl.unam.mx.
authors: Libia Hascibe
authors: LH
authors: Pérez-Bernal
authors: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, 82000 Mazatlán, Mexico; El Colegio de Sinaloa, Antonio Rosales 435, Culiacan, Sin. 80000, Mexico. Electronic address: paezos@ola.icmyl.unam.mx.
authors: Federico
authors: F
authors: Páez-Osuna
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D001272:Atmosphere / Q000737:chemistry; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D055768:Halogenated Diphenyl Ethers / Q000032:analysis*; D060106:Lakes / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D000393:Air Pollutants; D004785:Environmental Pollutants; D055768:Halogenated Diphenyl Ethers; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls
keywords: Central Mexico; Lake sediments; Long range atmospheric transport; PAHs; PBDEs; PCBs