Environmental deposition of PCDDs and PCDFs as determined by the analysis of snow samples from the Northern Sweden
1991; Elsevier BV; Volume: 23; Issue: 8-10 Linguagem: Inglês
10.1016/0045-6535(91)90160-f
ISSN1879-1298
AutoresStellan Marklund, Mats Tysklind, Roger Andersson, Karin Ljung, C. Rappe,
Tópico(s)Atmospheric chemistry and aerosols
ResumoAbstract Snow samples taken in the northen regions of Sweden have been analyzed for chlorinated polyaromatic compounds. In all samples detectable levels of polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) have been found. The congener profiles of PCDDs and PCDFs present in the snow samples were compared to those from combustion samples and from ambient air samples. The results show that local sources of PCDDs and PCDFs can be identified by the general backgrounds level of chlorinated dioxins and dibenzofurans in snow samples. The profiles of PCDFs from automobile emissions have a characteristic pattern, comprised predominantly by the lower chlorinated isomers. This profile in combination with the general background profile can be observed in samples taken close to roads with heavy traffic.
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