Mercury phase speciation in the surface waters of three Texas estuaries: Importance of colloidal forms

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dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorStordal MCen_US
dc.contributor.authorGill GAen_US
dc.contributor.authorWen LSen_US
dc.contributor.authorSantschi PHen_US
dc.contributor.otherLimnology and Oceanographyen_US
dc.date.accessioned2010-02-15T17:17:30Z
dc.date.available2010-02-15T17:17:30Z
dc.date.issued1996 Janen_US
dc.degreeen_US
dc.description52-61en_US
dc.description-otheren_US
dc.description.abstractSurface-water samples were collected from Galveston Bay, Corpus Christi Bay, Sabine Lake, and Laguna Madre and analyzed for Hg in the <0.45-mu m, 0.45-mu m-1-kDa, and <1-kDa fractions. Colloidal material was isolated with an Amicon cross-flow ultrafiltration system which was rigorously tested. Filter-passing Hg concentrations (< 0.45 mu m) ranged from 0.12 to 13.6 pM, with the highest values in Corpus Christi Bay. Within Galveston and Corpus Christi Bays, filter-passing Hg exhibited nonconservative estuarine mixing behavior. The colloidal Hg fraction ranged from 12 to 93% of the filter-passing pool and averaged 57 +/- 20%, indicating that a major portion of the operationally defined ''dissolved'' Hg is associated with submicron particles and macromolecules >1 kDa. Colloidal Hg covaries with colloidal organic C concentrations in Galveston Bay waters, suggesting that most of the filter-passing Hg pool is associated with large organic macromolecules. The log of the particle-water partition coefficient (K-d) ranged from 4.6 to 5.2, and covaried with suspended particulate matter concentrations, likely due to the presence of colloidal Hgen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23500
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 55ArticleEnglishStordal, M. CTEXAS A&M UNIV,DEPT OCEANOG,5007 AVE U,GALVESTON,TX 77551Cited References Count: 38UC907810 EAST 10TH ST, LAWRENCE, KS 66044-8897LAWRENCEen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51148.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectRADIOACTIVE TRACE-ELEMENTSen_US
dc.subjectORGANIC-MATTERen_US
dc.subjectCOASTALen_US
dc.subjectultrafiltrationen_US
dc.subjectCOMPLEXATIONen_US
dc.subjectPARTICLESen_US
dc.subjectSYSTEMSen_US
dc.subjectmetalsen_US
dc.subjectAREASen_US
dc.subjectFRESHen_US
dc.titleMercury phase speciation in the surface waters of three Texas estuaries: Importance of colloidal formsen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue41(1)en_US

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