An ultraclean cross-flow ultrafiltration technique for the study of trace metal phase speciation in seawater

dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorWen LSen_US
dc.contributor.authorStordal MCen_US
dc.contributor.authorTang DGen_US
dc.contributor.authorGill GAen_US
dc.contributor.authorSantschi PHen_US
dc.contributor.otherMarine Chemistryen_US
dc.date.accessioned2010-02-15T17:17:28Z
dc.date.available2010-02-15T17:17:28Z
dc.date.issued1996 Noven_US
dc.degreeen_US
dc.description129-152en_US
dc.description-otheren_US
dc.description.abstractA series of laboratory and field studies were conducted to test suitability and optimal sampling conditions of an Amicon ultrafiltration system for the collection of colloidal material for trace metal phase speciation studies in marine environments. A cleaning procedure is required between each sample processed to eliminate carry-over artifacts and achieve a low system blank. Mass-balance recovery of 88-109% was achieved for ultrafiltration of trace metals (e.g., Cd, Cu, Ni, Pb, Mn, Fe, Zn, HE) from estuarine samples. Results of sample storage experiments indicate that ultrafiltration should ideally be performed within 4 h of sample collection to prevent phase speciation shifts. The concentration of a number of trace metals in the permeate fraction, when plotted as a function of concentration factor, was found to fit the steady-state macromolecular permeation model of Kilduff and Weber (1992). A retentate concentration factor between 5 and 10 was optimal for most metals based on modeling the permeate metal concentration. For Galveston Bay, the colloidal fraction (1 kDa-0.45 mu m) accounted for 65-85% of the Cu, 35-40% of the Ni, and 30-95% of the Pb in the filtered (< 0.45 mu m) fraction. Colloidal Cu, Cu-c (1 kDa-0.2 mu m) was 64%, Ni, was 6%, Pb-c was 9% of the filtered (< 0.2 mu m) fraction in deep Pacific water samples from the colloid intercomparison exerciseen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23497
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 50ArticleEnglishWen, L. STEXAS A&M UNIV,DEPT OCEANOG,5007 AVE U,GALVESTON,TX 77551Cited References Count: 48VX686PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSAMSTERDAMen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51145.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectcolloidsen_US
dc.subjectCROSS-FLOW ULTRAFILTRATIONen_US
dc.subjecttrace metalsen_US
dc.subjectSPECIATIONen_US
dc.subjectorganic carbonen_US
dc.subjectPRE-CONCENTRATION EFFICIENCYen_US
dc.subjectPLASMA-MASS-SPECTROMETRYen_US
dc.subjectORGANIC-CARBONen_US
dc.subjectCOLLOIDAL MATERIALen_US
dc.subjectCHELEX-100 RESINen_US
dc.subjectHEAVY-METALSen_US
dc.subjectWATERen_US
dc.subjectELEMENTSen_US
dc.subjectCOLUMNen_US
dc.subjectOCEANen_US
dc.titleAn ultraclean cross-flow ultrafiltration technique for the study of trace metal phase speciation in seawateren_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue55(1-2)en_US
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