Temporal trends of PCDD/Fs in Baltic Sea sediment cores covering the 20th century

Environmental Science & Technology
Anteneh T AssefaKarin Wiberg

Abstract

The pollution trend of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the Baltic Sea region was studied based on depth profiles of PCDD/Fs in sediment cores collected from six offshore areas, eight coastal sites impacted by industrial/urban emissions, and one coastal reference site. A general trend was observed for the offshore and coastal reference sites with substantial increase in PCDD/F concentrations in the mid-late 1970s and peak levels during 1985-2002. The overall peak year for PCDD/Fs in Baltic Sea offshore areas was estimated (using spline-fit modeling) to 1994 ± 5 years, and a half-life in sediments was estimated at 29 ± 11 years. For the industrial/urban impacted coastal sites, the temporal trend was more variable with peak years occurring 1-2 decades earlier compared to offshore areas. The substantial reductions from peak levels (38 ± 11% and 81 ± 12% in offshore and coastal areas, respectively) reflect domestic and international actions taken for reduction of the release of PCDD/Fs to the environment. The modeled overall half-life and reductions of PCDD/Fs in offshore Baltic Sea sediment correspond well to both PCDD/F trends in European lakes without any known direct PCDD/F sources (half-lives 30...Continue Reading

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Citations

Mar 10, 2015·The Science of the Total Environment·Anna SobekKarin Wiberg
Sep 30, 2015·Environmental Science & Technology·Peter C Van MetreMarc Desmet
Jun 13, 2015·Journal of the Air & Waste Management Association·Miguel Dopico, Alberto Gómez
May 8, 2014·The Science of the Total Environment·A SobekG Cornelissen
Feb 17, 2018·Environmental Science. Processes & Impacts·Anteneh AssefaKarin Wiberg
May 26, 2016·Environmental Science. Processes & Impacts·Sobek AnnaBreitholtz Magnus
May 26, 2018·Environmental Monitoring and Assessment·A PouchK Pazdro
Oct 13, 2020·Environmental Pollution·Juanjo RodríguezOwen Rowe
Nov 20, 2020·The Science of the Total Environment·Lauri NevalainenAnnukka Lehikoinen
Aug 1, 2021·Marine Pollution Bulletin·Szczepan MikolajczykMarek Pajurek
Nov 21, 2017·Environmental Science & Technology·Bo YuanCynthia A de Wit
Sep 24, 2021·Environmental Science & Technology·Inna NybomAnna Sobek

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