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Uranium biogeochemistry across the redox transition zone of a permanently stratified fjord: Framvaren, Norway
During August 1995, the vertical concentration profile of dissolved and particulate uranium exhibited strong non-conservative characteristics in the upper 30 m of Framvaren Fjord. There was a pronounced peak in both particulate (>0.2 μm; 1.09 nM) and dissolved (
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| Published in: | Marine chemistry 1999-11, Vol.67 (3), p.181-198 |
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| cites | cdi_FETCH-LOGICAL-a390t-4f686f3f4f34f2aac4710c16f591125ddfc857417b2d50c0df7a73bc6da8e6543 |
| container_end_page | 198 |
| container_issue | 3 |
| container_start_page | 181 |
| container_title | Marine chemistry |
| container_volume | 67 |
| creator | Swarzenski, P.W. McKee, B.A. Skei, J.M. Todd, J.F. |
| description | During August 1995, the vertical concentration profile of dissolved and particulate uranium exhibited strong non-conservative characteristics in the upper 30 m of Framvaren Fjord. There was a pronounced peak in both particulate (>0.2 μm; 1.09 nM) and dissolved ( |
| doi_str_mv | 10.1016/S0304-4203(99)00058-4 |
| format | article |
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2/H
2S interface which is positioned well within the euphotic zone at about 20–21 m. Such concentration maxima at the redox boundary are also observed for dissolved organic carbon (DOC), Sr and Ba. Dissolved U levels seen in the water column from 18 m down to 30 m exceeded the high salinity (salinity=35) U concentrations (13.63±0.84 nM; Chen, J.H., Edwards, R.L., Wasserburg, G.L., 1986.
238
U,
234
U
and
232
Th
in seawater. Earth Planet Sci. Lett. 80, 241-251.) observed uniformly in the open ocean. A prolific population of S microbes (e.g.,
Chromatium,
Chlorobium sp.) flourishes at the O
2/H
2S interface. The source of elevated U at the redox boundary must be due to microbial uptake and subsequent release processes rather than dilution from oceanic uranium. Uranium oxidation state determinations in waters from 1, 22 and 30 m depth reveal that reduced U(IV) is not present in significant abundance, and that the chemical and/or biological reduction of hexavalent uranium is largely inhibited. Our results suggest that U and other trace constituents such as DOC, Sr, Ba, Fe(II), Mn(II) are greatly modified by direct and indirect microbial transformation reactions which are most concentrated across the redox transition zone in Framvaren Fjord.</description><identifier>ISSN: 0304-4203</identifier><identifier>EISSN: 1872-7581</identifier><identifier>DOI: 10.1016/S0304-4203(99)00058-4</identifier><identifier>CODEN: MRCHBD</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Framvaren Fjord ; Geochemistry ; Marine ; microbial mobilization ; Mineralogy ; oxidation–reduction ; Physical and chemical properties of sea water ; Physics of the oceans ; Silicates ; U oxidation states ; uranium biogeochemistry ; Water geochemistry</subject><ispartof>Marine chemistry, 1999-11, Vol.67 (3), p.181-198</ispartof><rights>1999 Elsevier Science B.V.</rights><rights>2000 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a390t-4f686f3f4f34f2aac4710c16f591125ddfc857417b2d50c0df7a73bc6da8e6543</citedby><cites>FETCH-LOGICAL-a390t-4f686f3f4f34f2aac4710c16f591125ddfc857417b2d50c0df7a73bc6da8e6543</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1188384$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Swarzenski, P.W.</creatorcontrib><creatorcontrib>McKee, B.A.</creatorcontrib><creatorcontrib>Skei, J.M.</creatorcontrib><creatorcontrib>Todd, J.F.</creatorcontrib><title>Uranium biogeochemistry across the redox transition zone of a permanently stratified fjord: Framvaren, Norway</title><title>Marine chemistry</title><description>During August 1995, the vertical concentration profile of dissolved and particulate uranium exhibited strong non-conservative characteristics in the upper 30 m of Framvaren Fjord. There was a pronounced peak in both particulate (>0.2 μm; 1.09 nM) and dissolved (<0.2 μm; 17.06 nM) uranium in the finely stratified waters at the O
2/H
2S interface which is positioned well within the euphotic zone at about 20–21 m. Such concentration maxima at the redox boundary are also observed for dissolved organic carbon (DOC), Sr and Ba. Dissolved U levels seen in the water column from 18 m down to 30 m exceeded the high salinity (salinity=35) U concentrations (13.63±0.84 nM; Chen, J.H., Edwards, R.L., Wasserburg, G.L., 1986.
238
U,
234
U
and
232
Th
in seawater. Earth Planet Sci. Lett. 80, 241-251.) observed uniformly in the open ocean. A prolific population of S microbes (e.g.,
Chromatium,
Chlorobium sp.) flourishes at the O
2/H
2S interface. The source of elevated U at the redox boundary must be due to microbial uptake and subsequent release processes rather than dilution from oceanic uranium. Uranium oxidation state determinations in waters from 1, 22 and 30 m depth reveal that reduced U(IV) is not present in significant abundance, and that the chemical and/or biological reduction of hexavalent uranium is largely inhibited. Our results suggest that U and other trace constituents such as DOC, Sr, Ba, Fe(II), Mn(II) are greatly modified by direct and indirect microbial transformation reactions which are most concentrated across the redox transition zone in Framvaren Fjord.</description><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Framvaren Fjord</subject><subject>Geochemistry</subject><subject>Marine</subject><subject>microbial mobilization</subject><subject>Mineralogy</subject><subject>oxidation–reduction</subject><subject>Physical and chemical properties of sea water</subject><subject>Physics of the oceans</subject><subject>Silicates</subject><subject>U oxidation states</subject><subject>uranium biogeochemistry</subject><subject>Water geochemistry</subject><issn>0304-4203</issn><issn>1872-7581</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNqFkMFu1DAQhi0EEkvhEZB8qKoiNdSO7cThUqGqBaSKHqBna9Yet66SeGt7C8vT492t6JHTXL6Zf_6PkPecfeSMd6c_mGCykS0Tx8PwgTGmdCNfkAXXfdv0SvOXZPEPeU3e5HxfoU6oYUGmmwRzWE90GeItRnuHU8glbSjYFHOm5Q5pQhd_01LBHEqIM_0TZ6TRU6ArTBPMOJdxQ-salOADOurvY3Kf6GWC6RESzif0e0y_YPOWvPIwZnz3NA_IzeXFz_OvzdX1l2_nn68aEAMrjfSd7rzw0gvpWwAre84s77waOG-Vc95q1UveL1unmGXO99CLpe0caOyUFAfkaH93leLDGnMxtZXFcay_xnU2XIu-01pUUO3BXduE3qxSmCBtDGdmK9fs5JqtOTMMZifXbAMOnwIgWxh9dWNDfl7m9bjeYmd7DGvZx4DJZBtwtuhCQluMi-E_QX8BhaGQGQ</recordid><startdate>19991101</startdate><enddate>19991101</enddate><creator>Swarzenski, P.W.</creator><creator>McKee, B.A.</creator><creator>Skei, J.M.</creator><creator>Todd, J.F.</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>19991101</creationdate><title>Uranium biogeochemistry across the redox transition zone of a permanently stratified fjord: Framvaren, Norway</title><author>Swarzenski, P.W. ; McKee, B.A. ; Skei, J.M. ; Todd, J.F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a390t-4f686f3f4f34f2aac4710c16f591125ddfc857417b2d50c0df7a73bc6da8e6543</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Framvaren Fjord</topic><topic>Geochemistry</topic><topic>Marine</topic><topic>microbial mobilization</topic><topic>Mineralogy</topic><topic>oxidation–reduction</topic><topic>Physical and chemical properties of sea water</topic><topic>Physics of the oceans</topic><topic>Silicates</topic><topic>U oxidation states</topic><topic>uranium biogeochemistry</topic><topic>Water geochemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Swarzenski, P.W.</creatorcontrib><creatorcontrib>McKee, B.A.</creatorcontrib><creatorcontrib>Skei, J.M.</creatorcontrib><creatorcontrib>Todd, J.F.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Marine chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Swarzenski, P.W.</au><au>McKee, B.A.</au><au>Skei, J.M.</au><au>Todd, J.F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Uranium biogeochemistry across the redox transition zone of a permanently stratified fjord: Framvaren, Norway</atitle><jtitle>Marine chemistry</jtitle><date>1999-11-01</date><risdate>1999</risdate><volume>67</volume><issue>3</issue><spage>181</spage><epage>198</epage><pages>181-198</pages><issn>0304-4203</issn><eissn>1872-7581</eissn><coden>MRCHBD</coden><abstract>During August 1995, the vertical concentration profile of dissolved and particulate uranium exhibited strong non-conservative characteristics in the upper 30 m of Framvaren Fjord. There was a pronounced peak in both particulate (>0.2 μm; 1.09 nM) and dissolved (<0.2 μm; 17.06 nM) uranium in the finely stratified waters at the O
2/H
2S interface which is positioned well within the euphotic zone at about 20–21 m. Such concentration maxima at the redox boundary are also observed for dissolved organic carbon (DOC), Sr and Ba. Dissolved U levels seen in the water column from 18 m down to 30 m exceeded the high salinity (salinity=35) U concentrations (13.63±0.84 nM; Chen, J.H., Edwards, R.L., Wasserburg, G.L., 1986.
238
U,
234
U
and
232
Th
in seawater. Earth Planet Sci. Lett. 80, 241-251.) observed uniformly in the open ocean. A prolific population of S microbes (e.g.,
Chromatium,
Chlorobium sp.) flourishes at the O
2/H
2S interface. The source of elevated U at the redox boundary must be due to microbial uptake and subsequent release processes rather than dilution from oceanic uranium. Uranium oxidation state determinations in waters from 1, 22 and 30 m depth reveal that reduced U(IV) is not present in significant abundance, and that the chemical and/or biological reduction of hexavalent uranium is largely inhibited. Our results suggest that U and other trace constituents such as DOC, Sr, Ba, Fe(II), Mn(II) are greatly modified by direct and indirect microbial transformation reactions which are most concentrated across the redox transition zone in Framvaren Fjord.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0304-4203(99)00058-4</doi><tpages>18</tpages></addata></record> |
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| ispartof | Marine chemistry, 1999-11, Vol.67 (3), p.181-198 |
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| language | eng |
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| source | ScienceDirect Freedom Collection 2022-2024 |
| subjects | Earth sciences Earth, ocean, space Exact sciences and technology External geophysics Framvaren Fjord Geochemistry Marine microbial mobilization Mineralogy oxidation–reduction Physical and chemical properties of sea water Physics of the oceans Silicates U oxidation states uranium biogeochemistry Water geochemistry |
| title | Uranium biogeochemistry across the redox transition zone of a permanently stratified fjord: Framvaren, Norway |
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