| Title: | "Seasonal soil/snow-air exchange of semivolatile organic pollutants at a coastal arctic site (Tromso, 69 degrees N)" |
| Author(s): | Casal P; Castro-Jimenez J; Pizarro M; Katsoyiannis A; Dachs J; |
| Address: | "Department of Environmental Chemistry (IDAEA-CSIC), Barcelona, Catalunya, Spain. Department of Environmental Chemistry (IDAEA-CSIC), Barcelona, Catalunya, Spain; Aix Marseille Univ, University de Toulon, CNRS, IRD, MIO UM 110, Marseille, France. NILU - Norwegian Institute for Air Research, Tromso, Norway. Department of Environmental Chemistry (IDAEA-CSIC), Barcelona, Catalunya, Spain. Electronic address: jordi.dachs@idaea.csic.es" |
| DOI: | 10.1016/j.scitotenv.2018.04.330 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Soils are a major reservoir of semivolatile organic pollutants such as polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), and exert a control on their atmospheric occurrence. We present here an assessment of the atmospheric occurrence and seasonality of soil/snow-air partitioning and exchange of PCBs, PAHs, hexachlorobenzene (HCB), and hexachlorocyclohexanes (HCHs) in the arctic city Tromso, northern Norway. The fugacities of the organic pollutants in soils and snow were determined using a soil fugacity sampler by equilibrating the air concentrations with those in the surface soil/snow. The concentrations in soils did not show a significant seasonality. Conversely, the ambient air concentrations and the soil (or snow) fugacity showed a clear seasonality for PCBs, HCH, HCB and some PAHs, related to temperature. Fugacities in soil/snow were correlated with those in the ambient gas phase, suggesting a close seasonal air-soil/snow coupling. Generally, there was a net deposition or close to equilibrium conditions during the winter, which contrasts with the net volatilization observed during the warmer periods. The chemicals with lower octanol-air partition coefficients showed a larger tendency for being volatilized and thus remobilized from this coastal arctic environment. Conversely, the more hydrophobic compounds were close to air-soil/snow equilibrium or showed a net deposition" |
| Keywords: | Air Pollutants/*analysis *Environmental Monitoring Norway Polychlorinated Biphenyls/analysis Polycyclic Aromatic Hydrocarbons/*analysis Seasons Snow/chemistry Soil/chemistry Soil Pollutants/*analysis Volatile Organic Compounds/*analysis Air-soil exchange; |
| Notes: | "MedlineCasal, Paulo Castro-Jimenez, Javier Pizarro, Mariana Katsoyiannis, Athanasios Dachs, Jordi eng Netherlands 2018/06/20 Sci Total Environ. 2018 Sep 15; 636:1109-1116. doi: 10.1016/j.scitotenv.2018.04.330. Epub 2018 May 3" |
