Trace metal composition of colloidal organic material in marine environments

Simple item page
dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorGuo LDen_US
dc.contributor.authorSantschi PHen_US
dc.contributor.authorWarnken KWen_US
dc.contributor.otherMarine Chemistryen_US
dc.date.accessioned2010-02-15T17:17:10Z
dc.date.available2010-02-15T17:17:10Z
dc.date.issued2000 Junen_US
dc.degreeen_US
dc.description257-275en_US
dc.description-otheren_US
dc.description.abstractMarine colloidal material (1 kDa-0.2 mu m) was isolated by cross-flow ultrafiltration followed by diafiltration and freeze-drying from surface waters of the Gulf of Mexico and the Middle Atlantic Eight (MAB), as well as from estuarine waters of Galveston Bay. Elemental characterization of isolated colloidal material included organic carbon (OC) and selected trace metal (Cu, Pb, Zn, Cd, Co, Ni, Cr, Be, Fe, Al, Mn, V, Ba, and Ti) determinations. It was found that levels of these metals in marine colloids ranged from < 0.1 to similar to 50 mu g/g colloidal matter, except for Fe which generally had a concentration > 120 mu g/g. Most metals (Cu, Pb, Zn, Ni, Al, Mn, V, and Ti) had an average concentration > 1 mu g/g while concentrations of Cd, Co and Be were usually < 1 mu g/g. Metal concentrations (mu g/g) in isolated colloids were, in general, higher in Galveston Bay than in the Gulf of Mexico, suggesting either high abundance of trace metals in estuarine waters or differences in organic matter composition. Higher colloidal metal concentrations in the MAB than in the Gulf of Mexico might be due to higher terrestrial inputs in the MAB. Colloidal metal concentrations (mu g/g) were generally lower than those in average soils, continental crust and suspended particles. However, metal/aluminum ratios (Me/Al) in isolated marine colloids were significantly higher than those for average soils and continental crust. Most importantly, colloids had a metal composition and metal/CC ratio (Me/C) similar to humic substances and marine plankton, suggesting that marine colloids largely originate from planktonic sources and are composed of predominately organic components. The Me/C ratios of Galveston Bay colloids followed the sequence of Cu > Ni, Clr, Zn > Mn > Co > Pb, Cd, which is similar to the Irving-Williams order except for Mn, suggesting that the interaction of metals with marine colloids is determined by the affinity of metals for specific organic ligands. (C) 2000 Elsevier Science B.V. All rights reserveden_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23454
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 19ArticleEnglishGuo, L. DTexas A&M Univ, Dept Oceanog, 5007 Ave U, Galveston, TX 77551 USACited References Count: 61335DUPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSAMSTERDAMen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51101.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjecttrace metalsen_US
dc.subjectcolloidsen_US
dc.subjectdissolved organic matteren_US
dc.subjectultrafiltrationen_US
dc.subjectGALVESTON BAYen_US
dc.subjectGulf of Mexicoen_US
dc.subjectAtlanticen_US
dc.subjectCROSS-FLOW FILTRATIONen_US
dc.subjectSAN-FRANCISCO BAYen_US
dc.subjectGULF-OF-MEXICOen_US
dc.subjectELEMENTAL COMPOSITIONen_US
dc.subjectNARRAGANSETT BAYen_US
dc.subjectNATURAL-WATERSen_US
dc.subjectSEA-WATERen_US
dc.subjectMATTERen_US
dc.subjectCARBONen_US
dc.subjectCOMPLEXATIONen_US
dc.titleTrace metal composition of colloidal organic material in marine environmentsen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue70(4)en_US

Files

Collections

Galveston Bay Bibliography
GBIC Abstracts (full text not available through Jack K. Williams Library)