uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Dioxin levels and congener patterns in water, sediment and fish from a coastal estuary of the Baltic Sea 
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Akvatisk miljöanalys)
IVL.
Umeå universitet.
Norwegian Geotechnical Institute.
Show others and affiliations
2009 (English)In: Organohalogen compounds: Volume 71, 2009, 810-815 p.Conference paper, Published paper (Other academic)
Abstract [en]

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.
Series
Organohalogen compounds, ISSN 1026-4892 ; 71
National Category
Environmental Sciences
Research subject
Earth Science with specialization in Environmental Analysis
Identifiers
URN: urn:nbn:se:uu:diva-120142OAI: oai:DiVA.org:uu-120142DiVA: diva2:302675
Conference
Dioxin 2009 - 29th International Symposium on Halogenated Persistent Organic Pollutants, 23-28 August 2009, Beijing, China
Available from: 2010-03-09 Created: 2010-03-09 Last updated: 2011-03-21Bibliographically approved
In thesis
1. Predicting Ecosystem Response from Pollution in Baltic Archipelago areas using Mass-balance Modelling
Open this publication in new window or tab >>Predicting Ecosystem Response from Pollution in Baltic Archipelago areas using Mass-balance Modelling
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Baltic archipelago areas have high nature values despite being polluted from various antrophogenic activities within the Baltic Sea catchment area and from long-range transport of airborne substances. The discovery of environmental problems in the Baltic Sea in the 1960s led to countermeasures that gradually gave results in reducing the toxic pollution, e.g. from PCBs. Today, much of the environmental management is focused on reducing the effects of eutrophication. There is a demand from society on science to develop strategies that can direct remedial actions so that the cost-effectiveness is maximised. This work focuses on how mass-balance models can be used to understand how coastal ecosystems are controlled by abiotic processes and to predict the response to changes in loading of different substances. Advection, sedimentation and burial are examples of general transport processes that are regulated by morphometrical characteristics, e.g. size, form, effective fetch and topographical openness. This is why different coastal areas have different sensitivity to loading of pollutants.

A comparison of six phosphorus and chlorophyll models of different complexity showed that the model performance was not improved with more state variables of total phosphorus (TP) than two water and two sediment compartments. Modelling chlorophyll as a separate state variable did not improve the results for individual values compared to a simple regression against total phosphorus in surface water. Field investigations of the phosphorus content in accumulation sediments along the coast of Svealand showed a distribution pattern that probably is related to differences in the redox status. The average content of mobile phosphorus was much higher than previously found in offshore Baltic sediments indicating that sediments may play an important role for the phosphorus turnover in Baltic archipelago areas.

A one-year field study to measure the levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in water, sediments and fish during different seasons was carried out in Kallrigafjärden Bay. The collected data set was used to test a mass-balance model for PCCD/F-turnover. It was possible to reproduce the concentrations of different PCDD/F-congeners with high accuracy using a general model approach, including one water compartment and two sediment compartments, indicating that the applied model has the necessary qualifications for successful predictions of PCDD/F-turnover in Baltic coastal areas.

Place, publisher, year, edition, pages
Uppsala: Universitetstryckeriet, 2011. 54 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 806
Keyword
Baltic Sea, archipelagos, aquatic ecosystems mass-balance modelling, sediment-water dynamics, phosphorus, dioxins, PCDD/Fs
National Category
Other Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Environmental Analysis
Identifiers
urn:nbn:se:uu:diva-144120 (URN)978-91-554-8012-7 (ISBN)
Public defence
2011-04-08, Hambergsalen, Villavägen 16, Uppsala, 13:00 (Swedish)
Opponent
Supervisors
Note
Felaktigt tryckt som Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 736Available from: 2011-03-18 Created: 2011-01-27 Last updated: 2011-05-04

Open Access in DiVA

No full text

Authority records BETA

Karlsson, Magnus

Search in DiVA

By author/editor
Karlsson, Magnus
By organisation
LUVAL
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 395 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf