RT info:eu-repo/semantics/article
T1 Factors Influencing the Soil–Air Partitioning and the Strength of Soils as a Secondary Source of Polychlorinated Biphenyls to the Atmosphere
A1 Cabrerizo, Ana
A1 Dachs, Jordi
A1 Moeckel, Claudia
A1 Ojeda, María-José
A1 Caballero, Gemma
A1 Barceló, Damià
A1 Jones, Kevin C.
AB Soils are a major reservoir of persistent organic pollutants, and soil-air partitioning and exchange are key processes controlling the atmospheric concentrations and regional fate of pollutants. Here, we report and discuss the concentrations of polychlorinated biphenyls (PCBs) in soils, their measured fugacities in soil, the soil-air partition coefficients (KSA) and soil-air fugacity gradients in rural background areas of N-NE Spain and N-NW England. Four sampling campaigns were carried out to assess seasonal and daily variability and differences between sampling sites. KSA values were significantly dependent on soil temperature and soil organic matter quantity, and to a minor extent organic matter type. All the PCB congeners in the soil are close to equilibrium with the atmosphere at rural Ebro sites, but soil fugacities tend to be higher than ambient air fugacities in early and late summer, consistent with the influence of temperature on soil-air partitioning. Therefore, during warm periods, soils increment their strength as secondary sources to the atmosphere. The mixture of PCBs found in the atmosphere is clearly strongly influenced by the mixture of PCBs which escape from soil, with significant correlations between them (R2 ranging between 0.35 and 0.74 and p-level
PB American Chemical Society
SN 0013-936X
YR 2011
FD 2011-05-03
LK https://uvadoc.uva.es/handle/10324/65148
UL https://uvadoc.uva.es/handle/10324/65148
LA eng
NO Environ. Sci. Technol. May 2011, n. 45, p. 4785–4792
NO Producción Científica
DS UVaDOC
RD 07-ago-2024