Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden
Global environmental concerns arise when marine deposits with fine-grained iron sulfide-rich sediments (FeS and FeS2), now situated above sea level, oxidize from anthropogenic lowering of the groundwater table. The oxidation of iron sulfides decreases the soil pH and the acidic environment of these...
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Uppsala universitet, Institutionen för geovetenskaper
2017
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ftuppsalauniv:oai:DiVA.org:uu-325213 2023-05-15T17:25:12+02:00 Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden Sura Sulfatjordar och Ackumulation av Metaller i Sediment Från Rosåns Avrinningsområde, Norra Sverige Lindström, Carola 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325213 eng eng Uppsala universitet, Institutionen för geovetenskaper Examensarbete vid Institutionen för geovetenskaper, 1650-6553 400 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325213 info:eu-repo/semantics/openAccess Acid sulfate soils increased metal concentrations anthropogenic activity Sura sulfatjordar ökade metallkoncentrationer mänsklig påverkan Geology Geologi Student thesis info:eu-repo/semantics/bachelorThesis text 2017 ftuppsalauniv 2023-02-23T21:36:00Z Global environmental concerns arise when marine deposits with fine-grained iron sulfide-rich sediments (FeS and FeS2), now situated above sea level, oxidize from anthropogenic lowering of the groundwater table. The oxidation of iron sulfides decreases the soil pH and the acidic environment of these Acid Sulfate Soils (AS) soils increase weathering and mobilization of metals into adjacent watercourses, lakes and estuaries. Low pH and enhanced concentrations of metals are known to influence water quality negatively, causing fish kills and reduced aquatic diversity. Sulfide rich sediments were deposited in the Baltic Sea after the last glaciation and are now abundantly found along the coasts of for example the Bothnian Bay as a result of isostatic rebound. Recent studies from Finland have stated associations between leached (AS) soils and increased concentrations of metals in estuary sediments, thus the effects are likely to be similar in Sweden. With financial support from the Interreg Nord project “Ecological restoration in coastal river basins in the Bothnian Bay” in cooperation with the Geological Survey of Sweden (SGU), sediments from three lakes and two estuarine sites in the Rosån catchment in Norrbotten county, northern Sweden, were sampled and analyzed with fpXRF, ICP-MS and LOI methods. Elemental concentrations and organic contents were compared to establish accumulation trends over time and relationships between metal concentrations in recently deposited sediments and potential influence from previously sampled (AS) soils. Correlations in time, to anthropogenic activity, such as ditching were also considered. A primary allover trend with increasing concentrations of Aluminum (Al), Arsenic (As), Cadmium (Cd), Cobalt (Co), Cupper (Cu), Iron (Fe), Manganese (Mn), Nickel (Ni), Lead (Pb), Rare Earth Elements (REE) and Zinc (Zn), was noticed in a majority of the lake and estuary sediment samples. With some site variation, also two discrete peaks at different depth, were found in the upper 20 to 30 cm of the ... Bachelor Thesis Norra Sverige Northern Sweden Norrbotten Uppsala University: Publications (DiVA) Sura ENVELOPE(34.333,34.333,67.917,67.917) |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Acid sulfate soils increased metal concentrations anthropogenic activity Sura sulfatjordar ökade metallkoncentrationer mänsklig påverkan Geology Geologi |
spellingShingle |
Acid sulfate soils increased metal concentrations anthropogenic activity Sura sulfatjordar ökade metallkoncentrationer mänsklig påverkan Geology Geologi Lindström, Carola Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden |
topic_facet |
Acid sulfate soils increased metal concentrations anthropogenic activity Sura sulfatjordar ökade metallkoncentrationer mänsklig påverkan Geology Geologi |
description |
Global environmental concerns arise when marine deposits with fine-grained iron sulfide-rich sediments (FeS and FeS2), now situated above sea level, oxidize from anthropogenic lowering of the groundwater table. The oxidation of iron sulfides decreases the soil pH and the acidic environment of these Acid Sulfate Soils (AS) soils increase weathering and mobilization of metals into adjacent watercourses, lakes and estuaries. Low pH and enhanced concentrations of metals are known to influence water quality negatively, causing fish kills and reduced aquatic diversity. Sulfide rich sediments were deposited in the Baltic Sea after the last glaciation and are now abundantly found along the coasts of for example the Bothnian Bay as a result of isostatic rebound. Recent studies from Finland have stated associations between leached (AS) soils and increased concentrations of metals in estuary sediments, thus the effects are likely to be similar in Sweden. With financial support from the Interreg Nord project “Ecological restoration in coastal river basins in the Bothnian Bay” in cooperation with the Geological Survey of Sweden (SGU), sediments from three lakes and two estuarine sites in the Rosån catchment in Norrbotten county, northern Sweden, were sampled and analyzed with fpXRF, ICP-MS and LOI methods. Elemental concentrations and organic contents were compared to establish accumulation trends over time and relationships between metal concentrations in recently deposited sediments and potential influence from previously sampled (AS) soils. Correlations in time, to anthropogenic activity, such as ditching were also considered. A primary allover trend with increasing concentrations of Aluminum (Al), Arsenic (As), Cadmium (Cd), Cobalt (Co), Cupper (Cu), Iron (Fe), Manganese (Mn), Nickel (Ni), Lead (Pb), Rare Earth Elements (REE) and Zinc (Zn), was noticed in a majority of the lake and estuary sediment samples. With some site variation, also two discrete peaks at different depth, were found in the upper 20 to 30 cm of the ... |
format |
Bachelor Thesis |
author |
Lindström, Carola |
author_facet |
Lindström, Carola |
author_sort |
Lindström, Carola |
title |
Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden |
title_short |
Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden |
title_full |
Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden |
title_fullStr |
Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden |
title_full_unstemmed |
Acid Sulfate Soils and Metal Accumulation in Sediments in Rosån Catchment, Northern Sweden |
title_sort |
acid sulfate soils and metal accumulation in sediments in rosån catchment, northern sweden |
publisher |
Uppsala universitet, Institutionen för geovetenskaper |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325213 |
long_lat |
ENVELOPE(34.333,34.333,67.917,67.917) |
geographic |
Sura |
geographic_facet |
Sura |
genre |
Norra Sverige Northern Sweden Norrbotten |
genre_facet |
Norra Sverige Northern Sweden Norrbotten |
op_relation |
Examensarbete vid Institutionen för geovetenskaper, 1650-6553 400 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325213 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766116548422926336 |