Dioxin levels and congener patterns in water, sediment and fish from a coastal estuary of the Baltic Sea
2009 (English)In: Organohalogen compounds: Volume 71, 2009, 810-815 p.Conference paper (Other academic)
An ecosystem approach was taken in order to study the turnover of PCDD/Fs in Kallrigafjärden Bay, a coastal estuary in the Baltic Sea. Samples from water within and flowing into the system, sediments and fish were collected, analysed on their content of 17 PCDD/Fs congeners and compared with each other in order to increase the understanding of present background levels of dioxins in Baltic Sea coastal ecosystems. In the water phase, PCDD/Fs were measured both as total levels using a specially designed high-volume filtration system and as the freely dissolved fraction using passive equilibrium samplers. Our results indicate that the PCDD/F contamination of the studied area was relatively low, which was anticipated since there are no known point sources in the vicinity of the area. There was congruence when PCDD/F levels from water, sediments and fish were compared with each other although the congener profiles varied considerably between the studied matrices. The congener profile for fish showed similarities with the equivalent profile for the freely dissolved water concentration. The temporal variability within the studied matrices, keeping in mind that the measured levels were low, was relatively high, which highlights the importance of not basing environmental assessments of dioxin contamination on too small datasets.
Place, publisher, year, edition, pages
2009. 810-815 p.
, Organohalogen compounds, ISSN 1026-4892 ; 71
Research subject Earth Science with specialization in Environmental Analysis
IdentifiersURN: urn:nbn:se:uu:diva-120142OAI: oai:DiVA.org:uu-120142DiVA: diva2:302675
Dioxin 2009 - 29th International Symposium on Halogenated Persistent Organic Pollutants, 23-28 August 2009, Beijing, China