Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada
The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.scitotenv.2019.05.258 ©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The seasonal variation in lake water arsenic (As) and antimony (S...
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Online Access: | http://hdl.handle.net/1974/26293 https://doi.org/10.1016/j.scitotenv.2019.05.258 |
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ftqueensuniv:oai:https://qspace.library.queensu.ca:1974/26293 2024-06-02T08:12:20+00:00 Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada Palmer, Michael J. Chételat, John Richardson, Murray Jamieson, Heather E. Galloway, Jennifer M. 2019-06-07T15:39:00Z application/pdf http://hdl.handle.net/1974/26293 https://doi.org/10.1016/j.scitotenv.2019.05.258 unknown Elsevier Palmer, M. J., Chételat, J., Richardson, M., Jamieson, H. E., & Galloway, J. M. (2019). Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada. Science of The Total Environment, 684, 326–339. doi:10.1016/j.scitotenv.2019.05.258 https://dx.doi.org/10.1016/j.scitotenv.2019.05.258 http://hdl.handle.net/1974/26293 https://creativecommons.org/licenses/by-nc-nd/4.0/ Antimony Arsenic Cryoconcentration Seasonality Sediment efflux Subarctic lakes journal article 2019 ftqueensuniv https://doi.org/10.1016/j.scitotenv.2019.05.258 2024-05-06T10:47:32Z The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.scitotenv.2019.05.258 ©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The seasonal variation in lake water arsenic (As) and antimony (Sb) concentrations was assessed in four small (<1.5 km2) subarctic lakes impacted by As and Sb emissions from legacy mining activities near Yellowknife, Northwest Territories, Canada. Substantial variation in As concentrations were measured over the two-year period of study in all but the deepest lake (maximum depth 6.9 m), including a four-fold difference in As in the shallowest lake ([As]: 172–846 μg L−1; maximum depth 0.8 m). Arsenic concentrations were enriched following ice cover development in the three shallowest lakes (50–110%) through a combination of physical and biogeochemical processes. Early winter increases in As were associated with the exclusion of solutes from the developing ice-cover; and large increases in As were measured once oxygen conditions were depleted to the point of anoxia by mid-winter. The onset of anoxic conditions within the water column was associated with large increases in the concentration of redox sensitive elements in lake waters (As, iron [Fe], and manganese [Mn]), suggesting coupling of As mobility with Fe and Mn cycling. In contrast, there was little difference in Sb concentrations under ice suggesting that Sb mobility was controlled by factors other than Fe and Mn associated redox processes. A survey of 30 lakes in the region during fall (open-water) and late-winter (under-ice) revealed large seasonal differences in surface water As were more common in lakes with a maximum depth <4 m. This threshold highlights the importance of winter conditions and links between physical lake properties and biogeochemical processes in the chemical recovery of As-impacted subarctic landscapes. The findings indicate annual remobilization of As from contaminated lake sediments may be ... Article in Journal/Newspaper Northwest Territories Subarctic Yellowknife Queen's University, Ontario: QSpace Northwest Territories Yellowknife Canada Science of The Total Environment 684 326 339 |
institution |
Open Polar |
collection |
Queen's University, Ontario: QSpace |
op_collection_id |
ftqueensuniv |
language |
unknown |
topic |
Antimony Arsenic Cryoconcentration Seasonality Sediment efflux Subarctic lakes |
spellingShingle |
Antimony Arsenic Cryoconcentration Seasonality Sediment efflux Subarctic lakes Palmer, Michael J. Chételat, John Richardson, Murray Jamieson, Heather E. Galloway, Jennifer M. Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada |
topic_facet |
Antimony Arsenic Cryoconcentration Seasonality Sediment efflux Subarctic lakes |
description |
The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.scitotenv.2019.05.258 ©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The seasonal variation in lake water arsenic (As) and antimony (Sb) concentrations was assessed in four small (<1.5 km2) subarctic lakes impacted by As and Sb emissions from legacy mining activities near Yellowknife, Northwest Territories, Canada. Substantial variation in As concentrations were measured over the two-year period of study in all but the deepest lake (maximum depth 6.9 m), including a four-fold difference in As in the shallowest lake ([As]: 172–846 μg L−1; maximum depth 0.8 m). Arsenic concentrations were enriched following ice cover development in the three shallowest lakes (50–110%) through a combination of physical and biogeochemical processes. Early winter increases in As were associated with the exclusion of solutes from the developing ice-cover; and large increases in As were measured once oxygen conditions were depleted to the point of anoxia by mid-winter. The onset of anoxic conditions within the water column was associated with large increases in the concentration of redox sensitive elements in lake waters (As, iron [Fe], and manganese [Mn]), suggesting coupling of As mobility with Fe and Mn cycling. In contrast, there was little difference in Sb concentrations under ice suggesting that Sb mobility was controlled by factors other than Fe and Mn associated redox processes. A survey of 30 lakes in the region during fall (open-water) and late-winter (under-ice) revealed large seasonal differences in surface water As were more common in lakes with a maximum depth <4 m. This threshold highlights the importance of winter conditions and links between physical lake properties and biogeochemical processes in the chemical recovery of As-impacted subarctic landscapes. The findings indicate annual remobilization of As from contaminated lake sediments may be ... |
format |
Article in Journal/Newspaper |
author |
Palmer, Michael J. Chételat, John Richardson, Murray Jamieson, Heather E. Galloway, Jennifer M. |
author_facet |
Palmer, Michael J. Chételat, John Richardson, Murray Jamieson, Heather E. Galloway, Jennifer M. |
author_sort |
Palmer, Michael J. |
title |
Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada |
title_short |
Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada |
title_full |
Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada |
title_fullStr |
Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada |
title_full_unstemmed |
Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada |
title_sort |
seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near yellowknife, nt, canada |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://hdl.handle.net/1974/26293 https://doi.org/10.1016/j.scitotenv.2019.05.258 |
geographic |
Northwest Territories Yellowknife Canada |
geographic_facet |
Northwest Territories Yellowknife Canada |
genre |
Northwest Territories Subarctic Yellowknife |
genre_facet |
Northwest Territories Subarctic Yellowknife |
op_relation |
Palmer, M. J., Chételat, J., Richardson, M., Jamieson, H. E., & Galloway, J. M. (2019). Seasonal variation of arsenic and antimony in surface waters of small subarctic lakes impacted by legacy mining pollution near Yellowknife, NT, Canada. Science of The Total Environment, 684, 326–339. doi:10.1016/j.scitotenv.2019.05.258 https://dx.doi.org/10.1016/j.scitotenv.2019.05.258 http://hdl.handle.net/1974/26293 |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1016/j.scitotenv.2019.05.258 |
container_title |
Science of The Total Environment |
container_volume |
684 |
container_start_page |
326 |
op_container_end_page |
339 |
_version_ |
1800758731627036672 |