Metal concentrations in sediments in acidifying lakes in Finnish Lapland
Fifteen lakes in the Finnish Lapland were investigated to study acidification and pollution effects on metal concentrations in sediments. In four lakes the pH was lower than 6.0 and the alkalinity was lower than 50 meq l–1. Contamination factor (Cf, ratio of metal concentration of the top layer to t...
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2024
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Online Access: | http://hdl.handle.net/10138/578000 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/578000 2024-09-15T18:00:09+00:00 Metal concentrations in sediments in acidifying lakes in Finnish Lapland Dauvalter, V. 2024-06-27T13:44:29Z 369-379 application/pdf http://hdl.handle.net/10138/578000 eng eng Boreal Environment Research Publishing Board Boreal Environment Research 1239-6095 1797-2469 4 2 http://hdl.handle.net/10138/578000 Suomen ympäristökeskus CC BY 4.0 openAccess Artikkeli lehdessä 2024 ftunivhelsihelda 2024-08-21T23:48:04Z Fifteen lakes in the Finnish Lapland were investigated to study acidification and pollution effects on metal concentrations in sediments. In four lakes the pH was lower than 6.0 and the alkalinity was lower than 50 meq l–1. Contamination factor (Cf, ratio of metal concentration of the top layer to the bottom layer in a sediment core) of Pb (Cf = 10.1–10.4) was high in comparison to other investigated heavy metals, particularly in acidic lakes. Lake acidification results in decreasing Ni, Cu, Zn, Cd, and Al concentrations towards the sediment surface. Reduction of organic material content (loss on ignition) in upper sediments of acidic lakes was also noticed. The buffer capacity index (BCI, ratio of sum of alkaline and alkaline-earth metals (K, Na, Ca, Mg) to Al) was lower in the acidic lakes (0.12–0.36) than in the other studied lakes (0.42–1.34) Article in Journal/Newspaper Boreal Environment Research Lapland HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
description |
Fifteen lakes in the Finnish Lapland were investigated to study acidification and pollution effects on metal concentrations in sediments. In four lakes the pH was lower than 6.0 and the alkalinity was lower than 50 meq l–1. Contamination factor (Cf, ratio of metal concentration of the top layer to the bottom layer in a sediment core) of Pb (Cf = 10.1–10.4) was high in comparison to other investigated heavy metals, particularly in acidic lakes. Lake acidification results in decreasing Ni, Cu, Zn, Cd, and Al concentrations towards the sediment surface. Reduction of organic material content (loss on ignition) in upper sediments of acidic lakes was also noticed. The buffer capacity index (BCI, ratio of sum of alkaline and alkaline-earth metals (K, Na, Ca, Mg) to Al) was lower in the acidic lakes (0.12–0.36) than in the other studied lakes (0.42–1.34) |
format |
Article in Journal/Newspaper |
author |
Dauvalter, V. |
spellingShingle |
Dauvalter, V. Metal concentrations in sediments in acidifying lakes in Finnish Lapland |
author_facet |
Dauvalter, V. |
author_sort |
Dauvalter, V. |
title |
Metal concentrations in sediments in acidifying lakes in Finnish Lapland |
title_short |
Metal concentrations in sediments in acidifying lakes in Finnish Lapland |
title_full |
Metal concentrations in sediments in acidifying lakes in Finnish Lapland |
title_fullStr |
Metal concentrations in sediments in acidifying lakes in Finnish Lapland |
title_full_unstemmed |
Metal concentrations in sediments in acidifying lakes in Finnish Lapland |
title_sort |
metal concentrations in sediments in acidifying lakes in finnish lapland |
publisher |
Boreal Environment Research Publishing Board |
publishDate |
2024 |
url |
http://hdl.handle.net/10138/578000 |
genre |
Boreal Environment Research Lapland |
genre_facet |
Boreal Environment Research Lapland |
op_relation |
Boreal Environment Research 1239-6095 1797-2469 4 2 http://hdl.handle.net/10138/578000 Suomen ympäristökeskus |
op_rights |
CC BY 4.0 openAccess |
_version_ |
1810437262716960768 |