Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut
The objective of this study was to determine the dominant biogeochemical controls on mercury partitioning in super-permafrost groundwater at Truelove Lowland, Devon Island, Nunavut. Mercury partitioning in snow, ephemeral standing water, and super-permafrost groundwater was investigated. Results ind...
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ftusaskatchewan:oai:harvest.usask.ca:10388/etd-07192008-155026 2023-05-15T15:05:59+02:00 Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut Dickson, Alanna L Siciliano, Steven Si, Bing C. Peak, J. Derek Knight, J. Diane Fleming, Ian R. 2008 http://hdl.handle.net/10388/etd-07192008-155026 en_US eng University of Saskatchewan http://hdl.handle.net/10388/etd-07192008-155026 TC-SSU-07192008155026 mercury partitioning super-permafrost groundwater Arctic text Thesis 2008 ftusaskatchewan 2022-01-17T11:53:20Z The objective of this study was to determine the dominant biogeochemical controls on mercury partitioning in super-permafrost groundwater at Truelove Lowland, Devon Island, Nunavut. Mercury partitioning in snow, ephemeral standing water, and super-permafrost groundwater was investigated. Results indicate that partitioning differs between matrices, and that particulate mercury is spatially and temporally dynamic in Truelove Lowland groundwater. Particulate mercury in groundwater was 73 % of total mercury, while snow had only 22 % particulate mercury. Particulate mercury in groundwater rose by over 20 % from Julian day 181 to 189, and decreased slightly on Julian day 191. No single geochemical parameter was a good predictor of particulate mercury concentrations. To expand upon the findings of the field study a laboratory microcosm study was conducted to determine whether certain biogeochemical processes influence mercury partitioning in super-permafrost groundwater. Particulate mercury in the dissimilatory iron reducing bacteria inhibited microcosm was 61 % of total mercury, approximately 18 % lower than in all other treatments. Iron (III) concentrations had a positive correlation with particulate mercury while chloride concentrations had a negative correlation with particulate mercury. Sulfate reducing bacteria were not found to influence mercury partitioning. Thesis Arctic Devon Island Nunavut permafrost University of Saskatchewan: eCommons@USASK Arctic Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) Nunavut |
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Open Polar |
collection |
University of Saskatchewan: eCommons@USASK |
op_collection_id |
ftusaskatchewan |
language |
English |
topic |
mercury partitioning super-permafrost groundwater Arctic |
spellingShingle |
mercury partitioning super-permafrost groundwater Arctic Dickson, Alanna L Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut |
topic_facet |
mercury partitioning super-permafrost groundwater Arctic |
description |
The objective of this study was to determine the dominant biogeochemical controls on mercury partitioning in super-permafrost groundwater at Truelove Lowland, Devon Island, Nunavut. Mercury partitioning in snow, ephemeral standing water, and super-permafrost groundwater was investigated. Results indicate that partitioning differs between matrices, and that particulate mercury is spatially and temporally dynamic in Truelove Lowland groundwater. Particulate mercury in groundwater was 73 % of total mercury, while snow had only 22 % particulate mercury. Particulate mercury in groundwater rose by over 20 % from Julian day 181 to 189, and decreased slightly on Julian day 191. No single geochemical parameter was a good predictor of particulate mercury concentrations. To expand upon the findings of the field study a laboratory microcosm study was conducted to determine whether certain biogeochemical processes influence mercury partitioning in super-permafrost groundwater. Particulate mercury in the dissimilatory iron reducing bacteria inhibited microcosm was 61 % of total mercury, approximately 18 % lower than in all other treatments. Iron (III) concentrations had a positive correlation with particulate mercury while chloride concentrations had a negative correlation with particulate mercury. Sulfate reducing bacteria were not found to influence mercury partitioning. |
author2 |
Siciliano, Steven Si, Bing C. Peak, J. Derek Knight, J. Diane Fleming, Ian R. |
format |
Thesis |
author |
Dickson, Alanna L |
author_facet |
Dickson, Alanna L |
author_sort |
Dickson, Alanna L |
title |
Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut |
title_short |
Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut |
title_full |
Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut |
title_fullStr |
Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut |
title_full_unstemmed |
Mercury partitioning in super-permafrost groundwater, Truelove Lowland, Devon Island, Nunavut |
title_sort |
mercury partitioning in super-permafrost groundwater, truelove lowland, devon island, nunavut |
publisher |
University of Saskatchewan |
publishDate |
2008 |
url |
http://hdl.handle.net/10388/etd-07192008-155026 |
long_lat |
ENVELOPE(-88.000,-88.000,75.252,75.252) |
geographic |
Arctic Devon Island Nunavut |
geographic_facet |
Arctic Devon Island Nunavut |
genre |
Arctic Devon Island Nunavut permafrost |
genre_facet |
Arctic Devon Island Nunavut permafrost |
op_relation |
http://hdl.handle.net/10388/etd-07192008-155026 TC-SSU-07192008155026 |
_version_ |
1766337667974299648 |