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Impact of urban stormwater on sediment quality in an enclosed bay of the Lule River, northern Sweden
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0003-1725-6478
2009 (English)In: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 73, no 13, suppl. 1, A1090- p.Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Sediment samples and porewater of an enclosed bay (Skutviken) affected by stormwater discharge near the centre of Luleå, northern Sweden, were analyzed for major and trace elements and 16 polycyclic aromatic hydrocarbons (PAHs), and compared to a reference site and local till. Among the studied metals, Cd, Cu, Pb and Zn were enriched at Skutviken. The use of trace metal ratios provided indications of pollutant sources for the sediment. Also, the PAH content was enriched, in particular for phenantrene, anthracene, fluoranthene and pyrene, which are regarded as common constituents in stormwater. Pb-210 dating was used to determine historical changes in metal and PAH fixation in the sediment. The bay Skutviken was enclosed by the construction of a road bank in 1962. The enclosure led to reduced water circulation in the bay, which promoted the occurrence of anoxic conditions with sulphate reduction within the bay. As a consequence of these conditions, metals are trapped in the sediments as sulphides. This study suggests that enclosed bays with restricted water circulation may be efficient traps for urban pollutants. In areas with postglacial rebound, where such bays are common, enclosure may have an important impact on water and sediment qualities. Due to the postglacial uplift, presently water covered sediments may rise above the groundwater level in the future. These sediments may then become a secondary pollution source if metal sulphides are oxidized.

Place, publisher, year, edition, pages
2009. Vol. 73, no 13, suppl. 1, A1090- p.
Keyword [en]
Natural sciences - Earth sciences
Keyword [sv]
Naturvetenskap - Geovetenskap
National Category
Geochemistry Water Engineering
Research subject
Applied Geology; Urban Water Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-29651DOI: 10.1016/j.gca.2009.05.014Local ID: 330f1580-67bd-11de-9f57-000ea68e967bOAI: oai:DiVA.org:ltu-29651DiVA: diva2:1002875
Conference
Annual V.M. Goldschmidt Conference : 21/06/2009 - 26/06/2009
Note

Godkänd; 2009; 20090703 (ralren)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-30Bibliographically approved

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