Publication details

Multiyear levels of PCDD/Fs, dl-PCBs and PAHs in background air in central Europe and implications for deposition

Authors

DEGRENDELE Céline FIEDLER Heidelore KOČAN Anton KUKUČKA Petr PŘIBYLOVÁ Petra PROKEŠ Roman KLÁNOVÁ Jana LAMMEL Gerhard

Year of publication 2020
Type Article in Periodical
Magazine / Source Chemosphere
MU Faculty or unit

Faculty of Science

Citation
Web https://doi.org/10.1016/j.chemosphere.2019.124852
Doi http://dx.doi.org/10.1016/j.chemosphere.2019.124852
Keywords Persistent organic pollutants; Seasonal variations; Gas-particle partitioning; Multi-year variations; Atmospheric deposition
Description This study presents four years ambient monitoring data of seventeen 2,3,7,8-chlorine substituted poly-chlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs), twelve dioxin-like poly-chlorinated biphenyls (dl-PCBs) and sixteen polycyclic aromatic hydrocarbons (PAHs) designed by the US EPA at a background site in central Europe during 2011-2014. The concentrations expressed as toxic equivalents (TEQs) using the WHO2005-scheme for PCDD/Fs (0.2 fg m(-3)-61.1 fg m(-3)) were higher than for dl-PCBs (0.01 fg m(-3)-2.9 fg m(-3)), while the opposite was found in terms of mass concentrations. Sigma PAHs ranged from 0.20 ng m(-3) to 134 ng(-3). The mass concentration profile of PCDD/Fs, dl-PCBs and PAHs was similar throughout the four years. PCDD/Fs and PAHs concentrations were dominated by primary sources peaking in winter, while those of dl-PCBs were controlled by secondary sources characterized by a spring-summer peak. During 2011-2014, no significant decrease in the atmospheric levels of Sigma PCDD/Fs was observed. On the other hand, the concentrations of Sigma dl-PCBs and Sigma PAHs were decreasing, with halving times of 5.7 and 2.7 years, respectively. We estimated that 422 pg m(-2) year pg m(-2) year TEQ PCDD/Fs and 3.48 pg m(-2) year(-1)-15.8 pg m(-2) year(-1) TEQ dl-PCBs were transferred from the air to the ground surfaces via dry particulate deposition during 2011-2014.
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