Pseudopolarographic Determination of Cd2+ Complexation in Freshwater
Pseudopolarography was used to detect Cd2+ complexes in samples collected at several locations along the Potomac River in June and September, 2004. Irrespective of site and sampling time, no weak inorganic Cd2+ species were present. However, up to two stable Cd2+-organic complexes were detected at e...
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| Veröffentlicht in: | Environmental science & technology 2006-09, Vol.40 (17), p.5388-5394 |
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| creator | Tsang, Jeffrey J Rozan, Tim F Hsu-Kim, Heileen Mullaugh, Katherine M Luther, George W |
| description | Pseudopolarography was used to detect Cd2+ complexes in samples collected at several locations along the Potomac River in June and September, 2004. Irrespective of site and sampling time, no weak inorganic Cd2+ species were present. However, up to two stable Cd2+-organic complexes were detected at each site. These unknown Cd2+ complexes were characterized by their half-wave potential (E 1/2). The E 1/2 values indicated certain Cd2+ complexes were common at different sites during each sampling but different complexes were observed in June and September. A Cd2+ chelate scale, generated from model ligands, was used to estimate the thermodynamic stability constants (K THERM) of the unknown complexes, which ranged from log K THERM = 21.5−32.0. Pseudopolarography did not recover all Cd2+ in the samples. This was partly attributed to highly stable Cd-sulfide species; owing to the presence of acid volatile sulfide at concentrations greater than total dissolved Cd2+. These electrochemically inert species may be multinuclear Cd-sulfide clusters and/or nanoparticles with K THERM values that exceed the detection window of pseudopolarography (log K THERM > 34.4). |
| doi_str_mv | 10.1021/es0525509 |
| format | Article |
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Irrespective of site and sampling time, no weak inorganic Cd2+ species were present. However, up to two stable Cd2+-organic complexes were detected at each site. These unknown Cd2+ complexes were characterized by their half-wave potential (E 1/2). The E 1/2 values indicated certain Cd2+ complexes were common at different sites during each sampling but different complexes were observed in June and September. A Cd2+ chelate scale, generated from model ligands, was used to estimate the thermodynamic stability constants (K THERM) of the unknown complexes, which ranged from log K THERM = 21.5−32.0. Pseudopolarography did not recover all Cd2+ in the samples. This was partly attributed to highly stable Cd-sulfide species; owing to the presence of acid volatile sulfide at concentrations greater than total dissolved Cd2+. These electrochemically inert species may be multinuclear Cd-sulfide clusters and/or nanoparticles with K THERM values that exceed the detection window of pseudopolarography (log K THERM > 34.4).</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es0525509</identifier><identifier>PMID: 16999115</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Biological and physicochemical phenomena ; Cadmium - analysis ; Cadmium - chemistry ; Continental surface waters ; Earth sciences ; Earth, ocean, space ; Electrochemistry - methods ; Engineering and environment geology. Geothermics ; Environmental science ; Exact sciences and technology ; Fresh Water ; Metals ; Natural water pollution ; Pollution ; Pollution, environment geology ; Rivers ; Scientific apparatus & instruments ; Water Pollutants, Chemical - analysis ; Water pollution ; Water treatment and pollution</subject><ispartof>Environmental science & technology, 2006-09, Vol.40 (17), p.5388-5394</ispartof><rights>Copyright © 2006 American Chemical Society</rights><rights>2007 INIST-CNRS</rights><rights>Copyright American Chemical Society Sep 1, 2006</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/es0525509$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/es0525509$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,27053,27901,27902,56713,56763</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18073962$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16999115$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Tsang, Jeffrey J</creatorcontrib><creatorcontrib>Rozan, Tim F</creatorcontrib><creatorcontrib>Hsu-Kim, Heileen</creatorcontrib><creatorcontrib>Mullaugh, Katherine M</creatorcontrib><creatorcontrib>Luther, George W</creatorcontrib><title>Pseudopolarographic Determination of Cd2+ Complexation in Freshwater</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>Pseudopolarography was used to detect Cd2+ complexes in samples collected at several locations along the Potomac River in June and September, 2004. Irrespective of site and sampling time, no weak inorganic Cd2+ species were present. However, up to two stable Cd2+-organic complexes were detected at each site. These unknown Cd2+ complexes were characterized by their half-wave potential (E 1/2). The E 1/2 values indicated certain Cd2+ complexes were common at different sites during each sampling but different complexes were observed in June and September. A Cd2+ chelate scale, generated from model ligands, was used to estimate the thermodynamic stability constants (K THERM) of the unknown complexes, which ranged from log K THERM = 21.5−32.0. Pseudopolarography did not recover all Cd2+ in the samples. This was partly attributed to highly stable Cd-sulfide species; owing to the presence of acid volatile sulfide at concentrations greater than total dissolved Cd2+. These electrochemically inert species may be multinuclear Cd-sulfide clusters and/or nanoparticles with K THERM values that exceed the detection window of pseudopolarography (log K THERM > 34.4).</description><subject>Applied sciences</subject><subject>Biological and physicochemical phenomena</subject><subject>Cadmium - analysis</subject><subject>Cadmium - chemistry</subject><subject>Continental surface waters</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Electrochemistry - methods</subject><subject>Engineering and environment geology. Geothermics</subject><subject>Environmental science</subject><subject>Exact sciences and technology</subject><subject>Fresh Water</subject><subject>Metals</subject><subject>Natural water pollution</subject><subject>Pollution</subject><subject>Pollution, environment geology</subject><subject>Rivers</subject><subject>Scientific apparatus & instruments</subject><subject>Water Pollutants, Chemical - analysis</subject><subject>Water pollution</subject><subject>Water treatment and pollution</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkW1Lw0AMxw9R3Ky-8AtIEXwl1eSu14eX0jkfmDhwgu-Oa3t11T551-L89p5sbpCQkPxI8ieEnCJcIVC8VgY45RziPTJGTsHjEcd9MgZA5sUseBuRI2M-AIAyiA7JCIM4jhH5mEzmRg1527WV1O27lt2yzNyJ6pWuy0b2Zdu4beEmOb10k7buKrVaF8vGnWpllt_SosfkoJCVUSeb6JDX6e0iufdmz3cPyc3MkzTwe4_KnNEoLPyiAOozDHnGJFjLU46RygDjULIwSmOkKvUDTPNcWl028wPKfOaQ8_XcTrdfgzK9-GgH3diVwgrDgHHrDjnbQENaq1x0uqyl_hH_mi1wsQGkyWRVaNlkpdlxEYQstvsc4q250vRqte1L_SmCkIVcLOYvIsQnfGR8IWA3V2ZmdxiC-PuR2P6I_QJiqH0z</recordid><startdate>20060901</startdate><enddate>20060901</enddate><creator>Tsang, Jeffrey J</creator><creator>Rozan, Tim F</creator><creator>Hsu-Kim, Heileen</creator><creator>Mullaugh, Katherine M</creator><creator>Luther, George W</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7QO</scope><scope>7ST</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope></search><sort><creationdate>20060901</creationdate><title>Pseudopolarographic Determination of Cd2+ Complexation in Freshwater</title><author>Tsang, Jeffrey J ; Rozan, Tim F ; Hsu-Kim, Heileen ; Mullaugh, Katherine M ; Luther, George W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a264t-2ad3287f4ff0243175c3a03a0db518ec0197a378b912eb461bdda255461462343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Applied sciences</topic><topic>Biological and physicochemical phenomena</topic><topic>Cadmium - analysis</topic><topic>Cadmium - chemistry</topic><topic>Continental surface waters</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Electrochemistry - methods</topic><topic>Engineering and environment geology. Geothermics</topic><topic>Environmental science</topic><topic>Exact sciences and technology</topic><topic>Fresh Water</topic><topic>Metals</topic><topic>Natural water pollution</topic><topic>Pollution</topic><topic>Pollution, environment geology</topic><topic>Rivers</topic><topic>Scientific apparatus & instruments</topic><topic>Water Pollutants, Chemical - analysis</topic><topic>Water pollution</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tsang, Jeffrey J</creatorcontrib><creatorcontrib>Rozan, Tim F</creatorcontrib><creatorcontrib>Hsu-Kim, Heileen</creatorcontrib><creatorcontrib>Mullaugh, Katherine M</creatorcontrib><creatorcontrib>Luther, George W</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tsang, Jeffrey J</au><au>Rozan, Tim F</au><au>Hsu-Kim, Heileen</au><au>Mullaugh, Katherine M</au><au>Luther, George W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pseudopolarographic Determination of Cd2+ Complexation in Freshwater</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>2006-09-01</date><risdate>2006</risdate><volume>40</volume><issue>17</issue><spage>5388</spage><epage>5394</epage><pages>5388-5394</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>Pseudopolarography was used to detect Cd2+ complexes in samples collected at several locations along the Potomac River in June and September, 2004. Irrespective of site and sampling time, no weak inorganic Cd2+ species were present. However, up to two stable Cd2+-organic complexes were detected at each site. These unknown Cd2+ complexes were characterized by their half-wave potential (E 1/2). The E 1/2 values indicated certain Cd2+ complexes were common at different sites during each sampling but different complexes were observed in June and September. A Cd2+ chelate scale, generated from model ligands, was used to estimate the thermodynamic stability constants (K THERM) of the unknown complexes, which ranged from log K THERM = 21.5−32.0. Pseudopolarography did not recover all Cd2+ in the samples. This was partly attributed to highly stable Cd-sulfide species; owing to the presence of acid volatile sulfide at concentrations greater than total dissolved Cd2+. These electrochemically inert species may be multinuclear Cd-sulfide clusters and/or nanoparticles with K THERM values that exceed the detection window of pseudopolarography (log K THERM > 34.4).</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>16999115</pmid><doi>10.1021/es0525509</doi><tpages>7</tpages></addata></record> |
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| subjects | Applied sciences Biological and physicochemical phenomena Cadmium - analysis Cadmium - chemistry Continental surface waters Earth sciences Earth, ocean, space Electrochemistry - methods Engineering and environment geology. Geothermics Environmental science Exact sciences and technology Fresh Water Metals Natural water pollution Pollution Pollution, environment geology Rivers Scientific apparatus & instruments Water Pollutants, Chemical - analysis Water pollution Water treatment and pollution |
| title | Pseudopolarographic Determination of Cd2+ Complexation in Freshwater |
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