Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples
Abstract The high demand for raw materials has increased interest in mining in the northern latitudes. However, mining and mineral processing may pose risks to the environment, which is especially vulnerable in the Arctic region. Xanthates are a group of chemicals used in mineral processing that hav...
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Oulun yliopisto
2023
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Online Access: | http://urn.fi/urn:isbn:9789526238425 |
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ftunivoulu:oai:oulu.fi:isbn978-952-62-3842-5 2023-11-12T04:13:03+01:00 Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples Suvela, R. (Ronja) Perämäki, P. (Paavo) Luukkanen, S. (Saija) Niemelä, M. (Matti) 2023-10-27 application/pdf http://urn.fi/urn:isbn:9789526238425 eng eng Oulun yliopisto info:eu-repo/semantics/altIdentifier/pissn/0355-3191 info:eu-repo/semantics/altIdentifier/eissn/1796-220X info:eu-repo/semantics/openAccess © University of Oulu, 2023 decomposition reaction flotation collector liquid chromatography liquid-liquid extraction xanthate hajoamisreaktio ksantaatti neste-nesteuutto nestekromatografia vaahdotus ICP-MS/MS info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/publishedVersion 2023 ftunivoulu 2023-11-02T00:00:28Z Abstract The high demand for raw materials has increased interest in mining in the northern latitudes. However, mining and mineral processing may pose risks to the environment, which is especially vulnerable in the Arctic region. Xanthates are a group of chemicals used in mineral processing that have recently raised concern. They can be toxic to aquatic environments, even at low concentrations. The toxicity of xanthates is mostly related to their decomposition products, such as carbon disulfide. The amounts of xanthates that are at risk of being discharged into the environment are so low that few methods are capable of reliably determining these concentrations. The first aim of this dissertation was to develop new, selective methods for the determination of low xanthate concentrations in process and environmental waters. The second aim was to study the effect of cold climates on the decomposition of xanthates. The studies were conducted at laboratory scale using artificial samples and samples collected from a mine site located in Finland. In this study, two analysis methods were developed. Both methods were based on the determination of xanthate derivatives by high-performance liquid chromatography tandem mass spectrometry (HPLC-ICP-MS/MS). The sample preparation procedures developed were based on oxidation and the complex formation reactions of xanthates; the former was applied when the decomposition of xanthates was studied in artificial and real samples. The results showed that the HPLC-ICP-MS/MS technique enables the selective determination of low xanthate concentrations. However, the complexity of the chemical reactions of xanthates required careful optimization of the sample preparation procedures to improve their reliability. Additionally, decomposition studies showed that low temperatures significantly decrease the decomposition rate of xanthates. This study presents a pioneering step to improve the analysis methods for the determination of xanthates. It also implies that cold climate conditions should ... Doctoral or Postdoctoral Thesis Arctic Jultika - University of Oulu repository |
institution |
Open Polar |
collection |
Jultika - University of Oulu repository |
op_collection_id |
ftunivoulu |
language |
English |
topic |
decomposition reaction flotation collector liquid chromatography liquid-liquid extraction xanthate hajoamisreaktio ksantaatti neste-nesteuutto nestekromatografia vaahdotus ICP-MS/MS |
spellingShingle |
decomposition reaction flotation collector liquid chromatography liquid-liquid extraction xanthate hajoamisreaktio ksantaatti neste-nesteuutto nestekromatografia vaahdotus ICP-MS/MS Suvela, R. (Ronja) Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
topic_facet |
decomposition reaction flotation collector liquid chromatography liquid-liquid extraction xanthate hajoamisreaktio ksantaatti neste-nesteuutto nestekromatografia vaahdotus ICP-MS/MS |
description |
Abstract The high demand for raw materials has increased interest in mining in the northern latitudes. However, mining and mineral processing may pose risks to the environment, which is especially vulnerable in the Arctic region. Xanthates are a group of chemicals used in mineral processing that have recently raised concern. They can be toxic to aquatic environments, even at low concentrations. The toxicity of xanthates is mostly related to their decomposition products, such as carbon disulfide. The amounts of xanthates that are at risk of being discharged into the environment are so low that few methods are capable of reliably determining these concentrations. The first aim of this dissertation was to develop new, selective methods for the determination of low xanthate concentrations in process and environmental waters. The second aim was to study the effect of cold climates on the decomposition of xanthates. The studies were conducted at laboratory scale using artificial samples and samples collected from a mine site located in Finland. In this study, two analysis methods were developed. Both methods were based on the determination of xanthate derivatives by high-performance liquid chromatography tandem mass spectrometry (HPLC-ICP-MS/MS). The sample preparation procedures developed were based on oxidation and the complex formation reactions of xanthates; the former was applied when the decomposition of xanthates was studied in artificial and real samples. The results showed that the HPLC-ICP-MS/MS technique enables the selective determination of low xanthate concentrations. However, the complexity of the chemical reactions of xanthates required careful optimization of the sample preparation procedures to improve their reliability. Additionally, decomposition studies showed that low temperatures significantly decrease the decomposition rate of xanthates. This study presents a pioneering step to improve the analysis methods for the determination of xanthates. It also implies that cold climate conditions should ... |
author2 |
Perämäki, P. (Paavo) Luukkanen, S. (Saija) Niemelä, M. (Matti) |
format |
Doctoral or Postdoctoral Thesis |
author |
Suvela, R. (Ronja) |
author_facet |
Suvela, R. (Ronja) |
author_sort |
Suvela, R. (Ronja) |
title |
Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
title_short |
Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
title_full |
Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
title_fullStr |
Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
title_full_unstemmed |
Sustainable mining in the Arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
title_sort |
sustainable mining in the arctic environment:development of analytical methods for the determination of xanthates and application of the methods to environmental and process water samples |
publisher |
Oulun yliopisto |
publishDate |
2023 |
url |
http://urn.fi/urn:isbn:9789526238425 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
info:eu-repo/semantics/altIdentifier/pissn/0355-3191 info:eu-repo/semantics/altIdentifier/eissn/1796-220X |
op_rights |
info:eu-repo/semantics/openAccess © University of Oulu, 2023 |
_version_ |
1782331234555265024 |