Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA.
Identifieur interne : 000E50 ( Main/Exploration ); précédent : 000E49; suivant : 000E51Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA.
Auteurs : Jason D. Demers [États-Unis] ; Joel D. Blum ; Scott C. Brooks ; Patrick M. Donovan ; Ami L. Riscassi ; Carrie L. Miller ; Wang Zheng ; Baohua GuSource :
- Environmental science. Processes & impacts [ 2050-7895 ] ; 2018.
Descripteurs français
- KwdFr :
- MESH :
- analyse : Isotopes du mercure, Mercure, Polluants chimiques de l'eau.
- composition chimique : Rivières.
- méthodes : Surveillance de l'environnement.
- Industrie, Tennessee.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Mercury, Mercury Isotopes, Water Pollutants, Chemical.
- chemistry : Rivers.
- methods : Environmental Monitoring.
- Industry, Tennessee.
Abstract
Natural abundance stable Hg isotope measurements were used to place new constraints on sources, transport, and transformations of Hg along the flow path of East Fork Poplar Creek (EFPC), a point-source contaminated headwater stream in Oak Ridge, Tennessee. Particulate-bound Hg in the water column of EFPC within the Y-12 National Security Complex, was isotopically similar to average metallic Hg(0) used in industry, having a mean δ202Hg value of -0.42 ± 0.09‰ (1SD) and near-zero Δ199Hg. On average, particulate fraction δ202Hg values increased downstream by 0.53‰, while Δ199Hg decreased by -0.10‰, converging with the Hg isotopic composition of the fine fraction of streambed sediment along the 26 km flow path. The dissolved fraction behaved differently. Although initial Δ199Hg values of the dissolved fraction were also near-zero, these values increased transiently along the flow path. Initial δ202Hg values of the dissolved fraction were more variable than in the particulate fraction, ranging from -0.44 to 0.18‰ among three seasonal sampling campaigns, but converged to an average δ202Hg value of 0.01 ± 0.10‰ (1SD) downstream. Dissolved Hg in the hyporheic and riparian pore water had higher and lower δ202Hg values, respectively, compared to dissolved Hg in stream water. Variations in Hg isotopic composition of the dissolved and suspended fractions along the flow path suggest that: (1) physical processes such as dilution and sedimentation do not fully explain decreases in total mercury concentrations along the flow path; (2) in-stream processes include photochemical reduction, but microbial reduction is likely more dominant; and (3) additional sources of dissolved mercury inputs to EFPC at baseflow during this study predominantly arise from the hyporheic zone.
DOI: 10.1039/c7em00538e
PubMed: 29520399
Affiliations:
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Blum</name></author><author><name sortKey="Brooks, Scott C" sort="Brooks, Scott C" uniqKey="Brooks S" first="Scott C" last="Brooks">Scott C. Brooks</name></author><author><name sortKey="Donovan, Patrick M" sort="Donovan, Patrick M" uniqKey="Donovan P" first="Patrick M" last="Donovan">Patrick M. Donovan</name></author><author><name sortKey="Riscassi, Ami L" sort="Riscassi, Ami L" uniqKey="Riscassi A" first="Ami L" last="Riscassi">Ami L. Riscassi</name></author><author><name sortKey="Miller, Carrie L" sort="Miller, Carrie L" uniqKey="Miller C" first="Carrie L" last="Miller">Carrie L. Miller</name></author><author><name sortKey="Zheng, Wang" sort="Zheng, Wang" uniqKey="Zheng W" first="Wang" last="Zheng">Wang Zheng</name></author><author><name sortKey="Gu, Baohua" sort="Gu, Baohua" uniqKey="Gu B" first="Baohua" last="Gu">Baohua Gu</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2018">2018</date><idno type="RBID">pubmed:29520399</idno><idno type="pmid">29520399</idno><idno type="doi">10.1039/c7em00538e</idno><idno type="wicri:Area/Main/Corpus">000F33</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000F33</idno><idno type="wicri:Area/Main/Curation">000F33</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">000F33</idno><idno type="wicri:Area/Main/Exploration">000F33</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA.</title><author><name sortKey="Demers, Jason D" sort="Demers, Jason D" uniqKey="Demers J" first="Jason D" last="Demers">Jason D. Demers</name><affiliation wicri:level="2"><nlm:affiliation>Department of Earth and Environmental Sciences, University of Michigan, 1100 N. University Ave., Ann Arbor, MI 48109, USA. jdemers@umich.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Earth and Environmental Sciences, University of Michigan, 1100 N. University Ave., Ann Arbor, MI 48109</wicri:regionArea><placeName><region type="state">Michigan</region></placeName></affiliation></author><author><name sortKey="Blum, Joel D" sort="Blum, Joel D" uniqKey="Blum J" first="Joel D" last="Blum">Joel D. Blum</name></author><author><name sortKey="Brooks, Scott C" sort="Brooks, Scott C" uniqKey="Brooks S" first="Scott C" last="Brooks">Scott C. Brooks</name></author><author><name sortKey="Donovan, Patrick M" sort="Donovan, Patrick M" uniqKey="Donovan P" first="Patrick M" last="Donovan">Patrick M. Donovan</name></author><author><name sortKey="Riscassi, Ami L" sort="Riscassi, Ami L" uniqKey="Riscassi A" first="Ami L" last="Riscassi">Ami L. Riscassi</name></author><author><name sortKey="Miller, Carrie L" sort="Miller, Carrie L" uniqKey="Miller C" first="Carrie L" last="Miller">Carrie L. Miller</name></author><author><name sortKey="Zheng, Wang" sort="Zheng, Wang" uniqKey="Zheng W" first="Wang" last="Zheng">Wang Zheng</name></author><author><name sortKey="Gu, Baohua" sort="Gu, Baohua" uniqKey="Gu B" first="Baohua" last="Gu">Baohua Gu</name></author></analytic><series><title level="j">Environmental science. Processes & impacts</title><idno type="eISSN">2050-7895</idno><imprint><date when="2018" type="published">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Environmental Monitoring (methods)</term><term>Industry (MeSH)</term><term>Mercury (analysis)</term><term>Mercury Isotopes (analysis)</term><term>Rivers (chemistry)</term><term>Tennessee (MeSH)</term><term>Water Pollutants, Chemical (analysis)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Industrie (MeSH)</term><term>Isotopes du mercure (analyse)</term><term>Mercure (analyse)</term><term>Polluants chimiques de l'eau (analyse)</term><term>Rivières (composition chimique)</term><term>Surveillance de l'environnement (méthodes)</term><term>Tennessee (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Mercury</term><term>Mercury Isotopes</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Isotopes du mercure</term><term>Mercure</term><term>Polluants chimiques de l'eau</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Rivers</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Rivières</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Environmental Monitoring</term></keywords><keywords scheme="MESH" qualifier="méthodes" xml:lang="fr"><term>Surveillance de l'environnement</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Industry</term><term>Tennessee</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Industrie</term><term>Tennessee</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Natural abundance stable Hg isotope measurements were used to place new constraints on sources, transport, and transformations of Hg along the flow path of East Fork Poplar Creek (EFPC), a point-source contaminated headwater stream in Oak Ridge, Tennessee. Particulate-bound Hg in the water column of EFPC within the Y-12 National Security Complex, was isotopically similar to average metallic Hg(0) used in industry, having a mean δ202Hg value of -0.42 ± 0.09‰ (1SD) and near-zero Δ199Hg. On average, particulate fraction δ202Hg values increased downstream by 0.53‰, while Δ199Hg decreased by -0.10‰, converging with the Hg isotopic composition of the fine fraction of streambed sediment along the 26 km flow path. The dissolved fraction behaved differently. Although initial Δ199Hg values of the dissolved fraction were also near-zero, these values increased transiently along the flow path. Initial δ202Hg values of the dissolved fraction were more variable than in the particulate fraction, ranging from -0.44 to 0.18‰ among three seasonal sampling campaigns, but converged to an average δ202Hg value of 0.01 ± 0.10‰ (1SD) downstream. Dissolved Hg in the hyporheic and riparian pore water had higher and lower δ202Hg values, respectively, compared to dissolved Hg in stream water. Variations in Hg isotopic composition of the dissolved and suspended fractions along the flow path suggest that: (1) physical processes such as dilution and sedimentation do not fully explain decreases in total mercury concentrations along the flow path; (2) in-stream processes include photochemical reduction, but microbial reduction is likely more dominant; and (3) additional sources of dissolved mercury inputs to EFPC at baseflow during this study predominantly arise from the hyporheic zone.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">29520399</PMID><DateCompleted><Year>2018</Year><Month>08</Month><Day>09</Day></DateCompleted><DateRevised><Year>2018</Year><Month>12</Month><Day>02</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">2050-7895</ISSN><JournalIssue CitedMedium="Internet"><Volume>20</Volume><Issue>4</Issue><PubDate><Year>2018</Year><Month>Apr</Month><Day>25</Day></PubDate></JournalIssue><Title>Environmental science. Processes & impacts</Title><ISOAbbreviation>Environ Sci Process Impacts</ISOAbbreviation></Journal><ArticleTitle>Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA.</ArticleTitle><Pagination><MedlinePgn>686-707</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1039/c7em00538e</ELocationID><Abstract><AbstractText>Natural abundance stable Hg isotope measurements were used to place new constraints on sources, transport, and transformations of Hg along the flow path of East Fork Poplar Creek (EFPC), a point-source contaminated headwater stream in Oak Ridge, Tennessee. Particulate-bound Hg in the water column of EFPC within the Y-12 National Security Complex, was isotopically similar to average metallic Hg(0) used in industry, having a mean δ202Hg value of -0.42 ± 0.09‰ (1SD) and near-zero Δ199Hg. On average, particulate fraction δ202Hg values increased downstream by 0.53‰, while Δ199Hg decreased by -0.10‰, converging with the Hg isotopic composition of the fine fraction of streambed sediment along the 26 km flow path. The dissolved fraction behaved differently. Although initial Δ199Hg values of the dissolved fraction were also near-zero, these values increased transiently along the flow path. Initial δ202Hg values of the dissolved fraction were more variable than in the particulate fraction, ranging from -0.44 to 0.18‰ among three seasonal sampling campaigns, but converged to an average δ202Hg value of 0.01 ± 0.10‰ (1SD) downstream. Dissolved Hg in the hyporheic and riparian pore water had higher and lower δ202Hg values, respectively, compared to dissolved Hg in stream water. Variations in Hg isotopic composition of the dissolved and suspended fractions along the flow path suggest that: (1) physical processes such as dilution and sedimentation do not fully explain decreases in total mercury concentrations along the flow path; (2) in-stream processes include photochemical reduction, but microbial reduction is likely more dominant; and (3) additional sources of dissolved mercury inputs to EFPC at baseflow during this study predominantly arise from the hyporheic zone.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Demers</LastName><ForeName>Jason D</ForeName><Initials>JD</Initials><Suffix></Suffix><AffiliationInfo><Affiliation>Department of Earth and Environmental Sciences, University of Michigan, 1100 N. University Ave., Ann Arbor, MI 48109, USA. jdemers@umich.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Blum</LastName><ForeName>Joel D</ForeName><Initials>JD</Initials><Suffix></Suffix></Author><Author ValidYN="Y"><LastName>Brooks</LastName><ForeName>Scott C</ForeName><Initials>SC</Initials><Suffix></Suffix></Author><Author ValidYN="Y"><LastName>Donovan</LastName><ForeName>Patrick M</ForeName><Initials>PM</Initials><Suffix></Suffix></Author><Author ValidYN="Y"><LastName>Riscassi</LastName><ForeName>Ami L</ForeName><Initials>AL</Initials><Suffix></Suffix></Author><Author ValidYN="Y"><LastName>Miller</LastName><ForeName>Carrie L</ForeName><Initials>CL</Initials><Suffix></Suffix></Author><Author ValidYN="Y"><LastName>Zheng</LastName><ForeName>Wang</ForeName><Initials>W</Initials><Suffix></Suffix></Author><Author ValidYN="Y"><LastName>Gu</LastName><ForeName>Baohua</ForeName><Initials>B</Initials><Suffix></Suffix></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Environ Sci Process Impacts</MedlineTA><NlmUniqueID>101601576</NlmUniqueID><ISSNLinking>2050-7887</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D008629">Mercury Isotopes</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D014874">Water Pollutants, Chemical</NameOfSubstance></Chemical><Chemical><RegistryNumber>FXS1BY2PGL</RegistryNumber><NameOfSubstance UI="D008628">Mercury</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D004784" MajorTopicYN="N">Environmental Monitoring</DescriptorName><QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D007221" MajorTopicYN="N">Industry</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008628" MajorTopicYN="N">Mercury</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008629" MajorTopicYN="N">Mercury Isotopes</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D045483" MajorTopicYN="N">Rivers</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013714" MajorTopicYN="N">Tennessee</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014874" MajorTopicYN="N">Water Pollutants, Chemical</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2018</Year><Month>3</Month><Day>10</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2018</Year><Month>8</Month><Day>10</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2018</Year><Month>3</Month><Day>10</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">29520399</ArticleId><ArticleId IdType="doi">10.1039/c7em00538e</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Michigan</li></region></list><tree><noCountry><name sortKey="Blum, Joel D" sort="Blum, Joel D" uniqKey="Blum J" first="Joel D" last="Blum">Joel D. Blum</name><name sortKey="Brooks, Scott C" sort="Brooks, Scott C" uniqKey="Brooks S" first="Scott C" last="Brooks">Scott C. Brooks</name><name sortKey="Donovan, Patrick M" sort="Donovan, Patrick M" uniqKey="Donovan P" first="Patrick M" last="Donovan">Patrick M. Donovan</name><name sortKey="Gu, Baohua" sort="Gu, Baohua" uniqKey="Gu B" first="Baohua" last="Gu">Baohua Gu</name><name sortKey="Miller, Carrie L" sort="Miller, Carrie L" uniqKey="Miller C" first="Carrie L" last="Miller">Carrie L. Miller</name><name sortKey="Riscassi, Ami L" sort="Riscassi, Ami L" uniqKey="Riscassi A" first="Ami L" last="Riscassi">Ami L. Riscassi</name><name sortKey="Zheng, Wang" sort="Zheng, Wang" uniqKey="Zheng W" first="Wang" last="Zheng">Wang Zheng</name></noCountry><country name="États-Unis"><region name="Michigan"><name sortKey="Demers, Jason D" sort="Demers, Jason D" uniqKey="Demers J" first="Jason D" last="Demers">Jason D. 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