Effects of iron surface adsorption and sample handling on iron solubility measurements
Seawater samples from two separate cruises in the Southern Ocean (ANTXXI/3 (EIFeX) and ANTXXIII/9) were collected for measurements of iron solubility by 55Fe addition. For both sets of samples, a significant loss of the dissolved portion of the added Fe was observed during the 72 hour duration of ea...
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2011
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ftsouthampton:oai:eprints.soton.ac.uk:207903 2023-07-30T04:07:02+02:00 Effects of iron surface adsorption and sample handling on iron solubility measurements Schlosser, C. De La Rocha, C.L. Croot, P.L. 2011-12-20 https://eprints.soton.ac.uk/207903/ unknown Schlosser, C., De La Rocha, C.L. and Croot, P.L. (2011) Effects of iron surface adsorption and sample handling on iron solubility measurements. Marine Chemistry, 127 (1-4), 48-55. (doi:10.1016/j.marchem.2011.07.008 <http://dx.doi.org/10.1016/j.marchem.2011.07.008>). Article PeerReviewed 2011 ftsouthampton https://doi.org/10.1016/j.marchem.2011.07.008 2023-07-09T21:25:10Z Seawater samples from two separate cruises in the Southern Ocean (ANTXXI/3 (EIFeX) and ANTXXIII/9) were collected for measurements of iron solubility by 55Fe addition. For both sets of samples, a significant loss of the dissolved portion of the added Fe was observed during the 72 hour duration of each Fe solubility measurement incubation. The decrease in dissolved Fe was related to Fe precipitation and adsorption onto bottle walls. The dissolved Fe data can be successfully modeled assuming that two colloidal Fe species (organically complexed Fe and inorganic Fe) were quickly formed following the addition of dissolved Fe(III) to the seawater. Model results indicate that Fe dissociated from weak organic complexes was the main contributor to wall sorption during the first 6 h following Fe addition, and that most of the Fe deposited after the first 6 h arose from the dissociation of colloidal inorganic species. Effects of sample freezing on Fe solubility measurements are also discussed. Article in Journal/Newspaper Southern Ocean University of Southampton: e-Prints Soton Southern Ocean Marine Chemistry 127 1-4 48 55 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Seawater samples from two separate cruises in the Southern Ocean (ANTXXI/3 (EIFeX) and ANTXXIII/9) were collected for measurements of iron solubility by 55Fe addition. For both sets of samples, a significant loss of the dissolved portion of the added Fe was observed during the 72 hour duration of each Fe solubility measurement incubation. The decrease in dissolved Fe was related to Fe precipitation and adsorption onto bottle walls. The dissolved Fe data can be successfully modeled assuming that two colloidal Fe species (organically complexed Fe and inorganic Fe) were quickly formed following the addition of dissolved Fe(III) to the seawater. Model results indicate that Fe dissociated from weak organic complexes was the main contributor to wall sorption during the first 6 h following Fe addition, and that most of the Fe deposited after the first 6 h arose from the dissociation of colloidal inorganic species. Effects of sample freezing on Fe solubility measurements are also discussed. |
format |
Article in Journal/Newspaper |
author |
Schlosser, C. De La Rocha, C.L. Croot, P.L. |
spellingShingle |
Schlosser, C. De La Rocha, C.L. Croot, P.L. Effects of iron surface adsorption and sample handling on iron solubility measurements |
author_facet |
Schlosser, C. De La Rocha, C.L. Croot, P.L. |
author_sort |
Schlosser, C. |
title |
Effects of iron surface adsorption and sample handling on iron solubility measurements |
title_short |
Effects of iron surface adsorption and sample handling on iron solubility measurements |
title_full |
Effects of iron surface adsorption and sample handling on iron solubility measurements |
title_fullStr |
Effects of iron surface adsorption and sample handling on iron solubility measurements |
title_full_unstemmed |
Effects of iron surface adsorption and sample handling on iron solubility measurements |
title_sort |
effects of iron surface adsorption and sample handling on iron solubility measurements |
publishDate |
2011 |
url |
https://eprints.soton.ac.uk/207903/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Schlosser, C., De La Rocha, C.L. and Croot, P.L. (2011) Effects of iron surface adsorption and sample handling on iron solubility measurements. Marine Chemistry, 127 (1-4), 48-55. (doi:10.1016/j.marchem.2011.07.008 <http://dx.doi.org/10.1016/j.marchem.2011.07.008>). |
op_doi |
https://doi.org/10.1016/j.marchem.2011.07.008 |
container_title |
Marine Chemistry |
container_volume |
127 |
container_issue |
1-4 |
container_start_page |
48 |
op_container_end_page |
55 |
_version_ |
1772820114063753216 |