The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments
Legacy arsenic contamination from past mining operations remains an environmental concern in lakes of Yellowknife (NWT) due to its post-depositional mobility. Warmer temperatures associated with climate change may impact arsenic diffusion from lake sediments either by direct effect on diffusion rate...
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ftcarletonuniv:oai:curve.carleton.ca:39752 2023-05-15T18:45:40+02:00 The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments Astles, Brittany Christian 2021 https://curve.carleton.ca/f0005c97-dc59-44a6-b86f-b2c1c31bf190 https://doi.org/10.22215/etd/2021-14821 https://ocul-crl.primo.exlibrisgroup.com/permalink/01OCUL_CRL/j2o5om/alma991022929632005153 unknown https://curve.carleton.ca/f0005c97-dc59-44a6-b86f-b2c1c31bf190 https://doi.org/10.22215/etd/2021-14821 https://ocul-crl.primo.exlibrisgroup.com/permalink/01OCUL_CRL/j2o5om/alma991022929632005153 Thesis/Dissertation 2021 ftcarletonuniv https://doi.org/10.22215/etd/2021-14821 2022-01-23T08:03:17Z Legacy arsenic contamination from past mining operations remains an environmental concern in lakes of Yellowknife (NWT) due to its post-depositional mobility. Warmer temperatures associated with climate change may impact arsenic diffusion from lake sediments either by direct effect on diffusion rate or indirect effects on microbial metabolism and sediment redox conditions. This thesis assessed the influence of warmer temperatures on arsenic diffusion from contaminated sediment of two lakes using an experimental incubation approach. Yellowknife Bay sediments (clay, 10 % organic matter, and arsenic = 1700 µg/g) differed from sediments of Lower Martin Lake (~70 % organic matter and arsenic = 822 µg/g). Duplicate sediment batches from each lake were incubated for four weekly temperature treatments (5 ℃ to 20 ℃ at 5 ℃ intervals) under oxygenated conditions and regularly sampled for water chemistry. Temperature had no influence on arsenic flux from either sediment type, other factors must be considered. Thesis Yellowknife CURVE - Carleton University Research Virtual Environment Yellowknife Yellowknife Bay ENVELOPE(-114.336,-114.336,62.367,62.367) |
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CURVE - Carleton University Research Virtual Environment |
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ftcarletonuniv |
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description |
Legacy arsenic contamination from past mining operations remains an environmental concern in lakes of Yellowknife (NWT) due to its post-depositional mobility. Warmer temperatures associated with climate change may impact arsenic diffusion from lake sediments either by direct effect on diffusion rate or indirect effects on microbial metabolism and sediment redox conditions. This thesis assessed the influence of warmer temperatures on arsenic diffusion from contaminated sediment of two lakes using an experimental incubation approach. Yellowknife Bay sediments (clay, 10 % organic matter, and arsenic = 1700 µg/g) differed from sediments of Lower Martin Lake (~70 % organic matter and arsenic = 822 µg/g). Duplicate sediment batches from each lake were incubated for four weekly temperature treatments (5 ℃ to 20 ℃ at 5 ℃ intervals) under oxygenated conditions and regularly sampled for water chemistry. Temperature had no influence on arsenic flux from either sediment type, other factors must be considered. |
format |
Thesis |
author |
Astles, Brittany Christian |
spellingShingle |
Astles, Brittany Christian The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments |
author_facet |
Astles, Brittany Christian |
author_sort |
Astles, Brittany Christian |
title |
The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments |
title_short |
The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments |
title_full |
The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments |
title_fullStr |
The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments |
title_full_unstemmed |
The Influence of Warmer Temperatures Brought on by Climate Change on the Mobility of Arsenic from Lake Sediments |
title_sort |
influence of warmer temperatures brought on by climate change on the mobility of arsenic from lake sediments |
publishDate |
2021 |
url |
https://curve.carleton.ca/f0005c97-dc59-44a6-b86f-b2c1c31bf190 https://doi.org/10.22215/etd/2021-14821 https://ocul-crl.primo.exlibrisgroup.com/permalink/01OCUL_CRL/j2o5om/alma991022929632005153 |
long_lat |
ENVELOPE(-114.336,-114.336,62.367,62.367) |
geographic |
Yellowknife Yellowknife Bay |
geographic_facet |
Yellowknife Yellowknife Bay |
genre |
Yellowknife |
genre_facet |
Yellowknife |
op_relation |
https://curve.carleton.ca/f0005c97-dc59-44a6-b86f-b2c1c31bf190 https://doi.org/10.22215/etd/2021-14821 https://ocul-crl.primo.exlibrisgroup.com/permalink/01OCUL_CRL/j2o5om/alma991022929632005153 |
op_doi |
https://doi.org/10.22215/etd/2021-14821 |
_version_ |
1766236775071612928 |