The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems
Iron (Fe) binding phases in two hydrothermal plumes in the Southern Ocean were studied using a novel voltammetric technique. This approach, reverse titration–competitive ligand exchange–adsorptive cathodic stripping voltammetry, showed that on average 30±21% of dissolved Fe in the hydrothermal plume...
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2013
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ftsouthampton:oai:eprints.soton.ac.uk:353653 2023-07-30T04:07:02+02:00 The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems Hawkes, Jeffrey A. Gledhill, Martha Connelly, Douglas P. Achterberg, Eric P. 2013-08-01 application/octet-stream https://eprints.soton.ac.uk/353653/ https://eprints.soton.ac.uk/353653/1/1-s2.0-S0012821X13003014-main.pdf__tid%253D9ce5ab40-b8b7-11e3-b1f9-00000aab0f26%2526acdnat%253D1396258630_10f4b445ee7be3fae2600b519d9842a3 en English eng https://eprints.soton.ac.uk/353653/1/1-s2.0-S0012821X13003014-main.pdf__tid%253D9ce5ab40-b8b7-11e3-b1f9-00000aab0f26%2526acdnat%253D1396258630_10f4b445ee7be3fae2600b519d9842a3 Hawkes, Jeffrey A., Gledhill, Martha, Connelly, Douglas P. and Achterberg, Eric P. (2013) The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems. Analytica Chimica Acta, 375, 280-290. (doi:10.1016/j.epsl.2013.05.047 <http://dx.doi.org/10.1016/j.epsl.2013.05.047>). other Article PeerReviewed 2013 ftsouthampton https://doi.org/10.1016/j.epsl.2013.05.047 2023-07-09T21:47:14Z Iron (Fe) binding phases in two hydrothermal plumes in the Southern Ocean were studied using a novel voltammetric technique. This approach, reverse titration–competitive ligand exchange–adsorptive cathodic stripping voltammetry, showed that on average 30±21% of dissolved Fe in the hydrothermal plumes was stabilised by chemically labile binding to ligands. The conditional stability constant (log K?FeL) of the observed complexes was 20.61±0.54 (mean±1 SD) for the two vent sites, intermediate between previous measurements of deep ocean ligands (21.4–23; Kondo et al., 2012) and dissolved weak estuarine ligands (<20; Gerringa et al., 2007). Our results indicate that approximately 7.5% of all hydrothermal Fe was stabilised by complexation with ligands. Furthermore, 47±26% of the dissolved Fe in the plume existed in the colloidal size range (0.02–0.2 µm). Our data suggests that a portion (?7.5%) of hydrothermal Fe is sufficiently stabilised in the dissolved size fraction (<0.2 µm) to make an important impact on deep ocean Fe distributions. Lateral deep ocean currents transport this hydrothermal Fe as lenses of enhanced Fe concentrations away from mid ocean ridge spreading centres and back arc basins. Article in Journal/Newspaper Southern Ocean University of Southampton: e-Prints Soton Kondo ENVELOPE(161.847,161.847,55.716,55.716) Southern Ocean Earth and Planetary Science Letters 375 280 290 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Iron (Fe) binding phases in two hydrothermal plumes in the Southern Ocean were studied using a novel voltammetric technique. This approach, reverse titration–competitive ligand exchange–adsorptive cathodic stripping voltammetry, showed that on average 30±21% of dissolved Fe in the hydrothermal plumes was stabilised by chemically labile binding to ligands. The conditional stability constant (log K?FeL) of the observed complexes was 20.61±0.54 (mean±1 SD) for the two vent sites, intermediate between previous measurements of deep ocean ligands (21.4–23; Kondo et al., 2012) and dissolved weak estuarine ligands (<20; Gerringa et al., 2007). Our results indicate that approximately 7.5% of all hydrothermal Fe was stabilised by complexation with ligands. Furthermore, 47±26% of the dissolved Fe in the plume existed in the colloidal size range (0.02–0.2 µm). Our data suggests that a portion (?7.5%) of hydrothermal Fe is sufficiently stabilised in the dissolved size fraction (<0.2 µm) to make an important impact on deep ocean Fe distributions. Lateral deep ocean currents transport this hydrothermal Fe as lenses of enhanced Fe concentrations away from mid ocean ridge spreading centres and back arc basins. |
format |
Article in Journal/Newspaper |
author |
Hawkes, Jeffrey A. Gledhill, Martha Connelly, Douglas P. Achterberg, Eric P. |
spellingShingle |
Hawkes, Jeffrey A. Gledhill, Martha Connelly, Douglas P. Achterberg, Eric P. The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
author_facet |
Hawkes, Jeffrey A. Gledhill, Martha Connelly, Douglas P. Achterberg, Eric P. |
author_sort |
Hawkes, Jeffrey A. |
title |
The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
title_short |
The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
title_full |
The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
title_fullStr |
The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
title_full_unstemmed |
The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
title_sort |
stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems |
publishDate |
2013 |
url |
https://eprints.soton.ac.uk/353653/ https://eprints.soton.ac.uk/353653/1/1-s2.0-S0012821X13003014-main.pdf__tid%253D9ce5ab40-b8b7-11e3-b1f9-00000aab0f26%2526acdnat%253D1396258630_10f4b445ee7be3fae2600b519d9842a3 |
long_lat |
ENVELOPE(161.847,161.847,55.716,55.716) |
geographic |
Kondo Southern Ocean |
geographic_facet |
Kondo Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/353653/1/1-s2.0-S0012821X13003014-main.pdf__tid%253D9ce5ab40-b8b7-11e3-b1f9-00000aab0f26%2526acdnat%253D1396258630_10f4b445ee7be3fae2600b519d9842a3 Hawkes, Jeffrey A., Gledhill, Martha, Connelly, Douglas P. and Achterberg, Eric P. (2013) The stabilisation and transportation of dissolved iron from high temperature hydrothermal vent systems. Analytica Chimica Acta, 375, 280-290. (doi:10.1016/j.epsl.2013.05.047 <http://dx.doi.org/10.1016/j.epsl.2013.05.047>). |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.epsl.2013.05.047 |
container_title |
Earth and Planetary Science Letters |
container_volume |
375 |
container_start_page |
280 |
op_container_end_page |
290 |
_version_ |
1772820121765543936 |