Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord
The marine fate and pelagic food chain transfer of three cyclic volatile methyl siloxanes (cVMS: D4, D5 and D6) was explored in the Inner Oslofjord, Norway, using two dynamic models (the Oslofjord POP Model and the aquatic component of ACC-HUMAN). Predicted concentrations of D4, D5, and D6 in the wa...
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ftnilu:oai:nilu.brage.unit.no:11250/2468994 2023-07-30T04:03:34+02:00 Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord Whelan, M.J. Breivik, Knut 2013 application/pdf http://hdl.handle.net/11250/2468994 https://doi.org/10.1016/j.chemosphere.2012.10.051 eng eng Norges forskningsråd: 196191 Whelan, M.J., Breivik, K. (2013). Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord. Chemosphere, 93, 794-804. doi:10.1016/j.chemosphere.2012.10.051 urn:issn:0045-6535 http://hdl.handle.net/11250/2468994 https://doi.org/10.1016/j.chemosphere.2012.10.051 cristin:1017572 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2012 Elsevier Ltd. All rights reserved. 794-804 93 Chemosphere 5 Journal article Peer reviewed 2013 ftnilu https://doi.org/10.1016/j.chemosphere.2012.10.051 2023-07-08T19:53:59Z The marine fate and pelagic food chain transfer of three cyclic volatile methyl siloxanes (cVMS: D4, D5 and D6) was explored in the Inner Oslofjord, Norway, using two dynamic models (the Oslofjord POP Model and the aquatic component of ACC-HUMAN). Predicted concentrations of D4, D5, and D6 in the water column were all less than current analytical detection limits, as was the predicted concentration of D4 in sediment (in agreement with measured data). The concentrations predicted for D5 and D6 in sediment were also in broad agreement with measured concentrations from the Inner Oslofjord. Volatilisation was predicted to be the most important loss mechanism for D5 and D6, whereas hydrolysis was predicted to dominate for D4. Concentrations of all three compounds in sediment are controlled by burial below the active mixed sediment layer. The marine food web model in ACC-HUMAN predicted ‘‘trophic dilution’’ of lipid-normalised cVMS concentrations between zooplankton and herring (Culpea harengus) and between herring and cod (Gadus morhua), principally due to a combination of in-fish metabolism and reduced gut absorption efficiency (as a consequence of high KOW). Predicted D5 concentrations in herring and cod agree well with measured data from the inner fjord, particularly when measured concentrations in zooplankton were used to set the initial dissolved-phase aqueous concentrations. Predicted concentrations of D4 and D6 in fish were over- and under-estimated by the model – possibly due to extrapolation of the metabolism rate constant from D5. acceptedVersion Article in Journal/Newspaper Gadus morhua NILU – Norwegian Institute for Air Research: NILU Brage Norway Chemosphere 93 5 794 804 |
institution |
Open Polar |
collection |
NILU – Norwegian Institute for Air Research: NILU Brage |
op_collection_id |
ftnilu |
language |
English |
description |
The marine fate and pelagic food chain transfer of three cyclic volatile methyl siloxanes (cVMS: D4, D5 and D6) was explored in the Inner Oslofjord, Norway, using two dynamic models (the Oslofjord POP Model and the aquatic component of ACC-HUMAN). Predicted concentrations of D4, D5, and D6 in the water column were all less than current analytical detection limits, as was the predicted concentration of D4 in sediment (in agreement with measured data). The concentrations predicted for D5 and D6 in sediment were also in broad agreement with measured concentrations from the Inner Oslofjord. Volatilisation was predicted to be the most important loss mechanism for D5 and D6, whereas hydrolysis was predicted to dominate for D4. Concentrations of all three compounds in sediment are controlled by burial below the active mixed sediment layer. The marine food web model in ACC-HUMAN predicted ‘‘trophic dilution’’ of lipid-normalised cVMS concentrations between zooplankton and herring (Culpea harengus) and between herring and cod (Gadus morhua), principally due to a combination of in-fish metabolism and reduced gut absorption efficiency (as a consequence of high KOW). Predicted D5 concentrations in herring and cod agree well with measured data from the inner fjord, particularly when measured concentrations in zooplankton were used to set the initial dissolved-phase aqueous concentrations. Predicted concentrations of D4 and D6 in fish were over- and under-estimated by the model – possibly due to extrapolation of the metabolism rate constant from D5. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Whelan, M.J. Breivik, Knut |
spellingShingle |
Whelan, M.J. Breivik, Knut Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord |
author_facet |
Whelan, M.J. Breivik, Knut |
author_sort |
Whelan, M.J. |
title |
Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord |
title_short |
Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord |
title_full |
Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord |
title_fullStr |
Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord |
title_full_unstemmed |
Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord |
title_sort |
dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the inner oslofjord |
publishDate |
2013 |
url |
http://hdl.handle.net/11250/2468994 https://doi.org/10.1016/j.chemosphere.2012.10.051 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
794-804 93 Chemosphere 5 |
op_relation |
Norges forskningsråd: 196191 Whelan, M.J., Breivik, K. (2013). Dynamic modelling of aquatic exposure and pelagic food chain transfer of cyclic volatile methyl siloxanes in the Inner Oslofjord. Chemosphere, 93, 794-804. doi:10.1016/j.chemosphere.2012.10.051 urn:issn:0045-6535 http://hdl.handle.net/11250/2468994 https://doi.org/10.1016/j.chemosphere.2012.10.051 cristin:1017572 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2012 Elsevier Ltd. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.chemosphere.2012.10.051 |
container_title |
Chemosphere |
container_volume |
93 |
container_issue |
5 |
container_start_page |
794 |
op_container_end_page |
804 |
_version_ |
1772814596929748992 |