Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula)
8 páginas, 3 tablas, 5 figuras The concentrations of Pt in sediments, water and suspended particulate matter (SPM) were determined in the Lérez River estuary (Pontevedra Ria, NW Iberian Peninsula) on two sampling dates in 2008 and 2011, by means of catalytic adsorptive stripping voltammetry. Average...
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ftcsic:oai:digital.csic.es:10261/72132 2024-02-11T10:06:46+01:00 Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) Cobelo-García, A. López-Sánchez, Daniel E. Almécija, Clara Santos-Echeandía, Juan 2013 http://hdl.handle.net/10261/72132 https://doi.org/10.1016/j.marchem.2013.01.005 en eng Elsevier http://dx.doi.org/10.1016/j.marchem.2013.01.005 Marine Chemistry 150: 11-18 (2013) 0304-4203 http://hdl.handle.net/10261/72132 doi:10.1016/j.marchem.2013.01.005 open Platinum Estuaries Particle–water interactions Chemical speciation Pontevedra Ria NW Iberian Peninsula artículo http://purl.org/coar/resource_type/c_6501 2013 ftcsic https://doi.org/10.1016/j.marchem.2013.01.005 2024-01-16T09:47:34Z 8 páginas, 3 tablas, 5 figuras The concentrations of Pt in sediments, water and suspended particulate matter (SPM) were determined in the Lérez River estuary (Pontevedra Ria, NW Iberian Peninsula) on two sampling dates in 2008 and 2011, by means of catalytic adsorptive stripping voltammetry. Average concentrations in sediments (1.2 ± 0.5 ng g− 1; n = 13) corresponded to an enrichment factor of 2–4 compared to background values, and were in the range of those found in the SPM during the 2011 sampling (2.1 ± 2.4 ng g− 1; n = 15), but significantly lower than those in 2008 SPM (8.0 ± 4.4 ng g− 1; n = 15). Higher dissolved Pt concentrations were also found in 2008 (0.21 and 0.62 pM in the freshwater and seawater end-member) compared to the 2011 campaign (0.03 — freshwater and 0.40 pM — seawater end-member). Concentrations in the seawater end-members exceed those of typical North Atlantic waters, suggesting inputs of this element within the estuary. The extremely low value for the freshwater end-member in 2011 appears to be among the lowest Pt concentrations ever reported in the literature. Non-conservative behavior of Pt during estuarine mixing was observed on both sampling dates. Particle–water distribution coefficients (KD) show a decrease with salinity, in agreement with speciation calculations, which predict a transfer from neutral Pt(II) (as Pt(OH)2) in freshwater to negatively charged Pt(IV) (as PtCl5(OH)2 −) species in seawater. Such behavior during estuarine mixing can play an important role in Pt mobilization from contaminated particles discharged into estuaries and coasts. This work was funded by the Galician Government (Xunta de Galicia) through the project ref. 08MDS036000PR, and the Spanish Ministry of Science and Innovation through the project P.I. 200830I150 Peer reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Marine Chemistry 150 11 18 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Platinum Estuaries Particle–water interactions Chemical speciation Pontevedra Ria NW Iberian Peninsula |
spellingShingle |
Platinum Estuaries Particle–water interactions Chemical speciation Pontevedra Ria NW Iberian Peninsula Cobelo-García, A. López-Sánchez, Daniel E. Almécija, Clara Santos-Echeandía, Juan Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) |
topic_facet |
Platinum Estuaries Particle–water interactions Chemical speciation Pontevedra Ria NW Iberian Peninsula |
description |
8 páginas, 3 tablas, 5 figuras The concentrations of Pt in sediments, water and suspended particulate matter (SPM) were determined in the Lérez River estuary (Pontevedra Ria, NW Iberian Peninsula) on two sampling dates in 2008 and 2011, by means of catalytic adsorptive stripping voltammetry. Average concentrations in sediments (1.2 ± 0.5 ng g− 1; n = 13) corresponded to an enrichment factor of 2–4 compared to background values, and were in the range of those found in the SPM during the 2011 sampling (2.1 ± 2.4 ng g− 1; n = 15), but significantly lower than those in 2008 SPM (8.0 ± 4.4 ng g− 1; n = 15). Higher dissolved Pt concentrations were also found in 2008 (0.21 and 0.62 pM in the freshwater and seawater end-member) compared to the 2011 campaign (0.03 — freshwater and 0.40 pM — seawater end-member). Concentrations in the seawater end-members exceed those of typical North Atlantic waters, suggesting inputs of this element within the estuary. The extremely low value for the freshwater end-member in 2011 appears to be among the lowest Pt concentrations ever reported in the literature. Non-conservative behavior of Pt during estuarine mixing was observed on both sampling dates. Particle–water distribution coefficients (KD) show a decrease with salinity, in agreement with speciation calculations, which predict a transfer from neutral Pt(II) (as Pt(OH)2) in freshwater to negatively charged Pt(IV) (as PtCl5(OH)2 −) species in seawater. Such behavior during estuarine mixing can play an important role in Pt mobilization from contaminated particles discharged into estuaries and coasts. This work was funded by the Galician Government (Xunta de Galicia) through the project ref. 08MDS036000PR, and the Spanish Ministry of Science and Innovation through the project P.I. 200830I150 Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Cobelo-García, A. López-Sánchez, Daniel E. Almécija, Clara Santos-Echeandía, Juan |
author_facet |
Cobelo-García, A. López-Sánchez, Daniel E. Almécija, Clara Santos-Echeandía, Juan |
author_sort |
Cobelo-García, A. |
title |
Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) |
title_short |
Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) |
title_full |
Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) |
title_fullStr |
Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) |
title_full_unstemmed |
Behavior of platinum during estuarine mixing (Pontevedra Ria, NW Iberian Peninsula) |
title_sort |
behavior of platinum during estuarine mixing (pontevedra ria, nw iberian peninsula) |
publisher |
Elsevier |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/72132 https://doi.org/10.1016/j.marchem.2013.01.005 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.1016/j.marchem.2013.01.005 Marine Chemistry 150: 11-18 (2013) 0304-4203 http://hdl.handle.net/10261/72132 doi:10.1016/j.marchem.2013.01.005 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.marchem.2013.01.005 |
container_title |
Marine Chemistry |
container_volume |
150 |
container_start_page |
11 |
op_container_end_page |
18 |
_version_ |
1790604712847867904 |