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Titolo:
COLLOIDAL TRACE-METALS, ORGANIC-CARBON AND NITROGEN IN A SOUTHEASTERNUS ESTUARY
Autore:
POWELL RT; LANDING WM; BAUER JE;
Indirizzi:
OLD DOMINION UNIV,DEPT CHEM & BIOCHEM NORFOLK VA 23529 FLORIDA STATE UNIV,DEPT OCEANOG TALLAHASSEE FL 32306 COLL WILLIAM & MARY,SCH MARINE SCI GLOUCESTER POINT VA 23062
Titolo Testata:
Marine chemistry
fascicolo: 1-2, volume: 55, anno: 1996,
pagine: 165 - 176
SICI:
0304-4203(1996)55:1-2<165:CTOANI>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
RIVER WATER; IRON; BEHAVIOR; SEAWATER; ADSORPTION; PARTICLES; TRANSPORT; MATTER; CU; MN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
R.T. Powell et al., "COLLOIDAL TRACE-METALS, ORGANIC-CARBON AND NITROGEN IN A SOUTHEASTERNUS ESTUARY", Marine chemistry, 55(1-2), 1996, pp. 165-176

Abstract

We have used cross-flow ultrafiltration on eleven 0.45-mu m-filtered samples taken across the salinity gradient in the Ochlockonee Estuary. We sequentially ultrafiltered the samples using 10- and 1-kD filters (1 kD = 1000 daltons). The results indicate that total Fe and Mn behave nonconservatively in the estuary and that the removal is from the high-molecular-weight (HMW; > 10 kD) fraction although Mn is removed at lower salinity than Fe. For Ni, Cu and Cd, the HMW fraction is very important in the river but these elements are quickly converted from HMWto low-molecular-weight (LMW) species with increasing salinity. Carbon in the HMW fraction is strongly correlated with Fe but only weakly correlated with Fe in the smaller size fractions. The two important processes controlling the behavior of metals, carbon and nitrogen in the estuary are colloid aggregation and desorption or dissociation.

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Documento generato il 29/11/20 alle ore 16:13:28