Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon
A chronology for the accumulation of a salt marsh core taken in the Venice Lagoon has been obtained from the activity-depth profile of excess 210 Pb , a naturally occurring radionuclide supplied to the marsh from the atmosphere. Over the past century, the accretion rate of the marsh increased from 0...
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| Veröffentlicht in: | Marine chemistry 1998-10, Vol.62 (1), p.15-29 |
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| creator | Cochran, J.K Frignani, M Salamanca, M Bellucci, L.G Guerzoni, S |
| description | A chronology for the accumulation of a salt marsh core taken in the Venice Lagoon has been obtained from the activity-depth profile of excess
210
Pb
, a naturally occurring radionuclide supplied to the marsh from the atmosphere. Over the past century, the accretion rate of the marsh increased from 0.07–0.08 cm yr
−1 to a maximum (0.2 cm yr
−1) in ∼1970, followed by a decrease to ∼0.18 cm yr
−1. The increase and recent constancy of accretion of the marsh follow the historical pattern of sea level change due to natural and human-induced (groundwater extraction) causes. The
210
Pb
chronology is used to determine depositional histories of anthropogenic trace metals, defined as metal concentration in excess of the background value determined at depth in the core. Several patterns are evident: fluxes of excess Ag and Cd increase to the present, Ni and Zn show increasing fluxes to ∼1970 with factor-of-two decreases in recently deposited material. Lead shows high and variable fluxes between 1940 and 1984, with recent decreases. Copper fluxes display a broad peak around 1960. Recent (∼1990) metal fluxes recorded in the marsh core agree within factors of 1.5 to 4 with directly measured (1993–1994) atmospheric fluxes in wet and dry deposition at a site in Venice. The data show that Cu and Pb inputs to the marsh can be accounted for by atmospheric deposition and significant fractions (27–42%) of Cd, Ni and Zn can be supplied by this pathway. Excess
210
Pb
inventories in both marsh and subtidal sediments from the Venice Lagoon are consistent with atmospheric supply of this radionuclide. If we assume that atmospheric supply of trace metals is the dominant source of heavy metal contaminants to the marsh, integrated deposition of excess metals in the marsh core, normalized to that of excess
210
Pb
, can be used to determine upper limits on the atmospheric contribution of trace metals to lagoon sediments. The results demonstrate that point source inputs of Cu, Ni, Pb and Zn are evident in sediments near the mainland, especially near Porto Marghera, but atmospheric inputs of Pb (and possibly Zn) tend to dominate in the northern and eastern portions of the lagoon. |
| doi_str_mv | 10.1016/S0304-4203(98)00017-6 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_16546082</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0304420398000176</els_id><sourcerecordid>16546082</sourcerecordid><originalsourceid>FETCH-LOGICAL-a487t-a61ec121ddae821595fa75587d839d9c75ea9de455f58f7f9b6ac3ca80fab2523</originalsourceid><addsrcrecordid>eNqNkE1rGzEQhkVooG6Sn1DQoYT2sI0-Vl-nEELaBBZyyNdRTLSjWMVeOdI64H_ftR1ybU8vDM_MOzyEfOXsJ2dcn90xydqmFUx-d_YHY4ybRh-QGbdGNEZZ_onMPpDP5EutfyZIS-Vm5KlD6BvBGYVKgY4FAhaaI4VxmetqjiUFmobVetwO5whvG7rEERZ1mtJxjnTIZYoy0EccUkDawUvOwzE5jBOEJ-95RB5-Xd1fXjfd7e-by4uugdaasQHNMXDB-x7QCq6cimCUsqa30vUuGIXgemyVispGE92zhiADWBbhWSghj8jp_u6q5Nc11tEvUw24WMCAeV0916rVzP4HKLXWxskJVHswlFxrwehXJS2hbDxnfuvb73z7rUzvrN_59nra-_ZeADXAIhYYQqofy0IKy9vtH-d7DCcrbwmLryHhELBPBcPo-5z-UfQXh6aTTA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>13666793</pqid></control><display><type>article</type><title>Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon</title><source>Access via ScienceDirect (Elsevier)</source><creator>Cochran, J.K ; Frignani, M ; Salamanca, M ; Bellucci, L.G ; Guerzoni, S</creator><creatorcontrib>Cochran, J.K ; Frignani, M ; Salamanca, M ; Bellucci, L.G ; Guerzoni, S</creatorcontrib><description>A chronology for the accumulation of a salt marsh core taken in the Venice Lagoon has been obtained from the activity-depth profile of excess
210
Pb
, a naturally occurring radionuclide supplied to the marsh from the atmosphere. Over the past century, the accretion rate of the marsh increased from 0.07–0.08 cm yr
−1 to a maximum (0.2 cm yr
−1) in ∼1970, followed by a decrease to ∼0.18 cm yr
−1. The increase and recent constancy of accretion of the marsh follow the historical pattern of sea level change due to natural and human-induced (groundwater extraction) causes. The
210
Pb
chronology is used to determine depositional histories of anthropogenic trace metals, defined as metal concentration in excess of the background value determined at depth in the core. Several patterns are evident: fluxes of excess Ag and Cd increase to the present, Ni and Zn show increasing fluxes to ∼1970 with factor-of-two decreases in recently deposited material. Lead shows high and variable fluxes between 1940 and 1984, with recent decreases. Copper fluxes display a broad peak around 1960. Recent (∼1990) metal fluxes recorded in the marsh core agree within factors of 1.5 to 4 with directly measured (1993–1994) atmospheric fluxes in wet and dry deposition at a site in Venice. The data show that Cu and Pb inputs to the marsh can be accounted for by atmospheric deposition and significant fractions (27–42%) of Cd, Ni and Zn can be supplied by this pathway. Excess
210
Pb
inventories in both marsh and subtidal sediments from the Venice Lagoon are consistent with atmospheric supply of this radionuclide. If we assume that atmospheric supply of trace metals is the dominant source of heavy metal contaminants to the marsh, integrated deposition of excess metals in the marsh core, normalized to that of excess
210
Pb
, can be used to determine upper limits on the atmospheric contribution of trace metals to lagoon sediments. The results demonstrate that point source inputs of Cu, Ni, Pb and Zn are evident in sediments near the mainland, especially near Porto Marghera, but atmospheric inputs of Pb (and possibly Zn) tend to dominate in the northern and eastern portions of the lagoon.</description><identifier>ISSN: 0304-4203</identifier><identifier>EISSN: 1872-7581</identifier><identifier>DOI: 10.1016/S0304-4203(98)00017-6</identifier><identifier>CODEN: MRCHBD</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>accumulation rates ; Earth sciences ; Earth, ocean, space ; Engineering and environment geology. Geothermics ; Exact sciences and technology ; Geochemistry ; Marine ; Mineralogy ; Pollution, environment geology ; radionuclides ; salt marsh ; Silicates ; trace metals ; Venice Lagoon ; Water geochemistry</subject><ispartof>Marine chemistry, 1998-10, Vol.62 (1), p.15-29</ispartof><rights>1998 Elsevier Science B.V.</rights><rights>1998 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a487t-a61ec121ddae821595fa75587d839d9c75ea9de455f58f7f9b6ac3ca80fab2523</citedby><cites>FETCH-LOGICAL-a487t-a61ec121ddae821595fa75587d839d9c75ea9de455f58f7f9b6ac3ca80fab2523</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0304-4203(98)00017-6$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2328142$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Cochran, J.K</creatorcontrib><creatorcontrib>Frignani, M</creatorcontrib><creatorcontrib>Salamanca, M</creatorcontrib><creatorcontrib>Bellucci, L.G</creatorcontrib><creatorcontrib>Guerzoni, S</creatorcontrib><title>Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon</title><title>Marine chemistry</title><description>A chronology for the accumulation of a salt marsh core taken in the Venice Lagoon has been obtained from the activity-depth profile of excess
210
Pb
, a naturally occurring radionuclide supplied to the marsh from the atmosphere. Over the past century, the accretion rate of the marsh increased from 0.07–0.08 cm yr
−1 to a maximum (0.2 cm yr
−1) in ∼1970, followed by a decrease to ∼0.18 cm yr
−1. The increase and recent constancy of accretion of the marsh follow the historical pattern of sea level change due to natural and human-induced (groundwater extraction) causes. The
210
Pb
chronology is used to determine depositional histories of anthropogenic trace metals, defined as metal concentration in excess of the background value determined at depth in the core. Several patterns are evident: fluxes of excess Ag and Cd increase to the present, Ni and Zn show increasing fluxes to ∼1970 with factor-of-two decreases in recently deposited material. Lead shows high and variable fluxes between 1940 and 1984, with recent decreases. Copper fluxes display a broad peak around 1960. Recent (∼1990) metal fluxes recorded in the marsh core agree within factors of 1.5 to 4 with directly measured (1993–1994) atmospheric fluxes in wet and dry deposition at a site in Venice. The data show that Cu and Pb inputs to the marsh can be accounted for by atmospheric deposition and significant fractions (27–42%) of Cd, Ni and Zn can be supplied by this pathway. Excess
210
Pb
inventories in both marsh and subtidal sediments from the Venice Lagoon are consistent with atmospheric supply of this radionuclide. If we assume that atmospheric supply of trace metals is the dominant source of heavy metal contaminants to the marsh, integrated deposition of excess metals in the marsh core, normalized to that of excess
210
Pb
, can be used to determine upper limits on the atmospheric contribution of trace metals to lagoon sediments. The results demonstrate that point source inputs of Cu, Ni, Pb and Zn are evident in sediments near the mainland, especially near Porto Marghera, but atmospheric inputs of Pb (and possibly Zn) tend to dominate in the northern and eastern portions of the lagoon.</description><subject>accumulation rates</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Engineering and environment geology. Geothermics</subject><subject>Exact sciences and technology</subject><subject>Geochemistry</subject><subject>Marine</subject><subject>Mineralogy</subject><subject>Pollution, environment geology</subject><subject>radionuclides</subject><subject>salt marsh</subject><subject>Silicates</subject><subject>trace metals</subject><subject>Venice Lagoon</subject><subject>Water geochemistry</subject><issn>0304-4203</issn><issn>1872-7581</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNqNkE1rGzEQhkVooG6Sn1DQoYT2sI0-Vl-nEELaBBZyyNdRTLSjWMVeOdI64H_ftR1ybU8vDM_MOzyEfOXsJ2dcn90xydqmFUx-d_YHY4ybRh-QGbdGNEZZ_onMPpDP5EutfyZIS-Vm5KlD6BvBGYVKgY4FAhaaI4VxmetqjiUFmobVetwO5whvG7rEERZ1mtJxjnTIZYoy0EccUkDawUvOwzE5jBOEJ-95RB5-Xd1fXjfd7e-by4uugdaasQHNMXDB-x7QCq6cimCUsqa30vUuGIXgemyVispGE92zhiADWBbhWSghj8jp_u6q5Nc11tEvUw24WMCAeV0916rVzP4HKLXWxskJVHswlFxrwehXJS2hbDxnfuvb73z7rUzvrN_59nra-_ZeADXAIhYYQqofy0IKy9vtH-d7DCcrbwmLryHhELBPBcPo-5z-UfQXh6aTTA</recordid><startdate>19981001</startdate><enddate>19981001</enddate><creator>Cochran, J.K</creator><creator>Frignani, M</creator><creator>Salamanca, M</creator><creator>Bellucci, L.G</creator><creator>Guerzoni, S</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7TN</scope><scope>7TV</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>19981001</creationdate><title>Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon</title><author>Cochran, J.K ; Frignani, M ; Salamanca, M ; Bellucci, L.G ; Guerzoni, S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a487t-a61ec121ddae821595fa75587d839d9c75ea9de455f58f7f9b6ac3ca80fab2523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>accumulation rates</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Engineering and environment geology. Geothermics</topic><topic>Exact sciences and technology</topic><topic>Geochemistry</topic><topic>Marine</topic><topic>Mineralogy</topic><topic>Pollution, environment geology</topic><topic>radionuclides</topic><topic>salt marsh</topic><topic>Silicates</topic><topic>trace metals</topic><topic>Venice Lagoon</topic><topic>Water geochemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cochran, J.K</creatorcontrib><creatorcontrib>Frignani, M</creatorcontrib><creatorcontrib>Salamanca, M</creatorcontrib><creatorcontrib>Bellucci, L.G</creatorcontrib><creatorcontrib>Guerzoni, S</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aqualine</collection><collection>Oceanic Abstracts</collection><collection>Pollution Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</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>Cochran, J.K</au><au>Frignani, M</au><au>Salamanca, M</au><au>Bellucci, L.G</au><au>Guerzoni, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon</atitle><jtitle>Marine chemistry</jtitle><date>1998-10-01</date><risdate>1998</risdate><volume>62</volume><issue>1</issue><spage>15</spage><epage>29</epage><pages>15-29</pages><issn>0304-4203</issn><eissn>1872-7581</eissn><coden>MRCHBD</coden><abstract>A chronology for the accumulation of a salt marsh core taken in the Venice Lagoon has been obtained from the activity-depth profile of excess
210
Pb
, a naturally occurring radionuclide supplied to the marsh from the atmosphere. Over the past century, the accretion rate of the marsh increased from 0.07–0.08 cm yr
−1 to a maximum (0.2 cm yr
−1) in ∼1970, followed by a decrease to ∼0.18 cm yr
−1. The increase and recent constancy of accretion of the marsh follow the historical pattern of sea level change due to natural and human-induced (groundwater extraction) causes. The
210
Pb
chronology is used to determine depositional histories of anthropogenic trace metals, defined as metal concentration in excess of the background value determined at depth in the core. Several patterns are evident: fluxes of excess Ag and Cd increase to the present, Ni and Zn show increasing fluxes to ∼1970 with factor-of-two decreases in recently deposited material. Lead shows high and variable fluxes between 1940 and 1984, with recent decreases. Copper fluxes display a broad peak around 1960. Recent (∼1990) metal fluxes recorded in the marsh core agree within factors of 1.5 to 4 with directly measured (1993–1994) atmospheric fluxes in wet and dry deposition at a site in Venice. The data show that Cu and Pb inputs to the marsh can be accounted for by atmospheric deposition and significant fractions (27–42%) of Cd, Ni and Zn can be supplied by this pathway. Excess
210
Pb
inventories in both marsh and subtidal sediments from the Venice Lagoon are consistent with atmospheric supply of this radionuclide. If we assume that atmospheric supply of trace metals is the dominant source of heavy metal contaminants to the marsh, integrated deposition of excess metals in the marsh core, normalized to that of excess
210
Pb
, can be used to determine upper limits on the atmospheric contribution of trace metals to lagoon sediments. The results demonstrate that point source inputs of Cu, Ni, Pb and Zn are evident in sediments near the mainland, especially near Porto Marghera, but atmospheric inputs of Pb (and possibly Zn) tend to dominate in the northern and eastern portions of the lagoon.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0304-4203(98)00017-6</doi><tpages>15</tpages></addata></record> |
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| identifier | ISSN: 0304-4203 |
| ispartof | Marine chemistry, 1998-10, Vol.62 (1), p.15-29 |
| issn | 0304-4203 1872-7581 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_16546082 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | accumulation rates Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Exact sciences and technology Geochemistry Marine Mineralogy Pollution, environment geology radionuclides salt marsh Silicates trace metals Venice Lagoon Water geochemistry |
| title | Lead-210 as a tracer of atmospheric input of heavy metals in the northern Venice Lagoon |
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