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Impact of Urban Stormwater on Sediment Quality in an Enclosed Bay of the Lule River, Northern Sweden
(UMFpub)
2011 (Engelska)Ingår i: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 218, nr 1-4, s. 651-666Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Sediment and porewater samples from an enclosed bay receiving stormwater discharge (Skutviken) near the centre of LuleAyen, northern Sweden were analysed for major and trace elements and 16 polycyclic aromatic hydrocarbons (PAHs). Among the studied metals Cd, Cu, Pb and Zn were enriched at Skutviken. Also, the PAH content was enriched, in particular for phenantrene, anthracene, fluoranthene and pyrene which are regarded as common constituents in stormwater. The use of trace metal ratios provided indications about pollutant sources for the sediment. Cs-137 dating was used to determine historical changes in metal and PAH fixation in the sediment. The bay Skutviken is enclosed through the construction of a road bank since 1962. The enclosure led to reduced water circulation in the bay that promotes 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, reducing the present-day input of pollutants to the sea. In areas with postglacial land uplift, where such bays are common, bay sediments are a potential future source of pollutants when uplift results in erosion and oxidation of the sediments.

Ort, förlag, år, upplaga, sidor
SPRINGER , 2011. Vol. 218, nr 1-4, s. 651-666
Nyckelord [en]
Stormwater, Sediment quality, Trace metals, PAH
Identifikatorer
URN: urn:nbn:se:umu:diva-140790DOI: 10.1007/s11270-010-0675-7ISI: 000290724400057OAI: oai:DiVA.org:umu-140790DiVA, id: diva2:1150518
Tillgänglig från: 2017-10-19 Skapad: 2017-10-19 Senast uppdaterad: 2017-10-19

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