2026-04-14T18:11:59Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/651482025-09-10T12:32:52Zcom_10324_1173com_10324_931com_10324_894col_10324_1371

Cabrerizo Pastor, Ana Dachs, Jordi Moeckel, Claudia Ojeda, María-José Caballero, Gemma Barceló, Damià Jones, Kevin C. 2024-01-29T05:28:04Z 2024-01-29T05:28:04Z 2011 Environ. Sci. Technol. May 2011, n. 45, p. 4785–4792 0013-936X https://uvadoc.uva.es/handle/10324/65148 10.1021/es200400e 11 1520-5851 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 eng info:eu-repo/semantics/openAccess American Chemical Society Factors Influencing the Soil–Air Partitioning and the Strength of Soils as a Secondary Source of Polychlorinated Biphenyls to the Atmosphere info:eu-repo/semantics/article