Chemical Speciation of Antarctic Atmospheric Depositions
Both inorganic and organic complexation of metal cations in clouds or rainwater is essential to describe the global biogeochemical cycles of metals, because complexation can increase metal solubility and stabilize some of their oxidation states. Within a Project of the National Research Program in t...
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ftdoajarticles:oai:doaj.org/article:cd902ec3934343c799ce6dcd51eaffe6 2023-05-15T13:57:37+02:00 Chemical Speciation of Antarctic Atmospheric Depositions Stefano Bertinetti Silvia Berto Mery Malandrino Davide Vione Ornella Abollino Eleonora Conca Matteo Marafante Anna Annibaldi Cristina Truzzi Silvia Illuminati 2022-04-01T00:00:00Z https://doi.org/10.3390/app12094438 https://doaj.org/article/cd902ec3934343c799ce6dcd51eaffe6 EN eng MDPI AG https://www.mdpi.com/2076-3417/12/9/4438 https://doaj.org/toc/2076-3417 doi:10.3390/app12094438 2076-3417 https://doaj.org/article/cd902ec3934343c799ce6dcd51eaffe6 Applied Sciences, Vol 12, Iss 4438, p 4438 (2022) Antarctica atmospheric depositions metal complexes metal speciation chemical modeling metal cations Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 article 2022 ftdoajarticles https://doi.org/10.3390/app12094438 2022-12-30T22:40:58Z Both inorganic and organic complexation of metal cations in clouds or rainwater is essential to describe the global biogeochemical cycles of metals, because complexation can increase metal solubility and stabilize some of their oxidation states. Within a Project of the National Research Program in the Antarctica, atmospheric depositions were collected during the Antarctic summer 2017–2018 in eight sampling sites. The main ionic components occurring in water extracts of these atmospheric depositions were quantified, and a chemical model was applied, in order to identify the main species occurring in the samples. The speciation study showed that most cations were present as aquoions, except for Fe, which occurred predominantly in hydrolytic forms. The model allowed us to foresee the effect of an increase in the concentration levels of all the solution components, by simulating what could happen when the original particles act as cloud condensation nuclei. The role of inorganic anions as complexing agents becomes important when increasing total concentrations of all the solutes by a factor >100 compared to the water extracts, while the presence of organic acids acquires significance for samples having organic acid concentration higher than 10 −5 mol L −1 . Moreover, it was possible to pinpoint the formation constants that mostly affect the chemical system, and to gain insight into the behavior of metals in wet depositions, which is fundamental knowledge in atmospheric photochemistry studies and in the modeling of the biogeochemical cycles of metal cations. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Applied Sciences 12 9 4438 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica atmospheric depositions metal complexes metal speciation chemical modeling metal cations Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Antarctica atmospheric depositions metal complexes metal speciation chemical modeling metal cations Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Stefano Bertinetti Silvia Berto Mery Malandrino Davide Vione Ornella Abollino Eleonora Conca Matteo Marafante Anna Annibaldi Cristina Truzzi Silvia Illuminati Chemical Speciation of Antarctic Atmospheric Depositions |
topic_facet |
Antarctica atmospheric depositions metal complexes metal speciation chemical modeling metal cations Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
description |
Both inorganic and organic complexation of metal cations in clouds or rainwater is essential to describe the global biogeochemical cycles of metals, because complexation can increase metal solubility and stabilize some of their oxidation states. Within a Project of the National Research Program in the Antarctica, atmospheric depositions were collected during the Antarctic summer 2017–2018 in eight sampling sites. The main ionic components occurring in water extracts of these atmospheric depositions were quantified, and a chemical model was applied, in order to identify the main species occurring in the samples. The speciation study showed that most cations were present as aquoions, except for Fe, which occurred predominantly in hydrolytic forms. The model allowed us to foresee the effect of an increase in the concentration levels of all the solution components, by simulating what could happen when the original particles act as cloud condensation nuclei. The role of inorganic anions as complexing agents becomes important when increasing total concentrations of all the solutes by a factor >100 compared to the water extracts, while the presence of organic acids acquires significance for samples having organic acid concentration higher than 10 −5 mol L −1 . Moreover, it was possible to pinpoint the formation constants that mostly affect the chemical system, and to gain insight into the behavior of metals in wet depositions, which is fundamental knowledge in atmospheric photochemistry studies and in the modeling of the biogeochemical cycles of metal cations. |
format |
Article in Journal/Newspaper |
author |
Stefano Bertinetti Silvia Berto Mery Malandrino Davide Vione Ornella Abollino Eleonora Conca Matteo Marafante Anna Annibaldi Cristina Truzzi Silvia Illuminati |
author_facet |
Stefano Bertinetti Silvia Berto Mery Malandrino Davide Vione Ornella Abollino Eleonora Conca Matteo Marafante Anna Annibaldi Cristina Truzzi Silvia Illuminati |
author_sort |
Stefano Bertinetti |
title |
Chemical Speciation of Antarctic Atmospheric Depositions |
title_short |
Chemical Speciation of Antarctic Atmospheric Depositions |
title_full |
Chemical Speciation of Antarctic Atmospheric Depositions |
title_fullStr |
Chemical Speciation of Antarctic Atmospheric Depositions |
title_full_unstemmed |
Chemical Speciation of Antarctic Atmospheric Depositions |
title_sort |
chemical speciation of antarctic atmospheric depositions |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/app12094438 https://doaj.org/article/cd902ec3934343c799ce6dcd51eaffe6 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Applied Sciences, Vol 12, Iss 4438, p 4438 (2022) |
op_relation |
https://www.mdpi.com/2076-3417/12/9/4438 https://doaj.org/toc/2076-3417 doi:10.3390/app12094438 2076-3417 https://doaj.org/article/cd902ec3934343c799ce6dcd51eaffe6 |
op_doi |
https://doi.org/10.3390/app12094438 |
container_title |
Applied Sciences |
container_volume |
12 |
container_issue |
9 |
container_start_page |
4438 |
_version_ |
1766265320019853312 |