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Persistent Organic Pollutants in Streamwater: Influence of Hydrological Conditions and Landscape Type

Josefsson, Sarah and Futter, Martyn and Bergknut, Magnus and Jansson, Stina and Laudon, Hjalmar and Lundin, Lisa and Wiberg, Karin (2016). Persistent Organic Pollutants in Streamwater: Influence of Hydrological Conditions and Landscape Type. Environmental science & technology (online). 50:14, 7416-7424
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Abstract

Concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and hexachlorobenzene (HCB) in streamwater were measured in a remote catchment in northern Sweden and downstream to the Baltic Sea. Sampling took place at seven sites during two years and under different hydrological conditions: during the snow-free, snow-covered, and spring-flood seasons. Concentrations varied substantially between seasons and were up to 20 times higher during the spring flood compared to the preceding snow-covered period. The increase in concentrations with runoff was due to higher levels of particle-associated contaminants, while the dissolved concentrations remained stable. Particulate-contaminant concentrations were positively correlated primarily to suspended particulate matter (SPM) at sites in areas with a high land-cover fraction of sorted sediment. When upstream sampling locations were compared, a mire-dominated stream had higher concentrations and a lower retention of atmospherically deposited contaminants than a forest stream of the same catchment size. Contaminant concentrations (normalized to volume) did not increase consistently downstream despite the presence of several point sources. However, when normalized to the amount of SPM, concentrations were on average >20 times higher at the outlet in the Baltic Sea compared to the outlet from the remote catchment without point sources.

Authors/Creators:Josefsson, Sarah and Futter, Martyn and Bergknut, Magnus and Jansson, Stina and Laudon, Hjalmar and Lundin, Lisa and Wiberg, Karin
Title:Persistent Organic Pollutants in Streamwater: Influence of Hydrological Conditions and Landscape Type
Series/Journal:Environmental science & technology (online) (1520-5851)
Year of publishing :2016
Volume:50
Number:14
Page range:7416-7424
Number of Pages:9
Publisher:American Chemical Society
ISSN:1520-5851
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:wathersheds, pollutants
Keywords:polycyclic aromatic-hydrocarbons, boreal catchment, polychlorinated-biphenyls, dioxins, water
URN:NBN:urn:nbn:se:slu:epsilon-e-3652
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3652
Additional ID:
Type of IDID
Web of Science (WoS)000380295700017
DOI10.1021/acs.est.6b00475
ID Code:13645
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
(S) > Dept. of Forest Ecology and Management
External funders:FORMAS and Kempe Foundations and MISTRA
Deposited By: SLUpub Connector
Deposited On:09 Sep 2016 08:58
Metadata Last Modified:11 Sep 2017 06:46

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