Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MERCURY ASSOCIATED WITH COLLOIDAL MATERIAL IN AN ESTUARINE AND AN OPEN-OCEAN ENVIRONMENT
Autore:
GUENTZEL JL; POWELL RT; LANDING WM; MASON RP;
Indirizzi:
FLORIDA STATE UNIV,DEPT OCEANOG TALLAHASSEE FL 32306 UNIV MARYLAND,CHESAPEAKE BIOL LAB SOLOMONS MD 20688
Titolo Testata:
Marine chemistry
fascicolo: 1-2, volume: 55, anno: 1996,
pagine: 177 - 188
SICI:
0304-4203(1996)55:1-2<177:MAWCMI>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-STAGE GOLD AMALGAMATION; GAS-PHASE DETECTION; ORGANIC-CARBON; PARTICULATE MATTER; SURFACE WATERS; NATURAL-WATERS; SUB-NANOGRAM; SPECIATION; SEAWATER; METALS;
Keywords:
MERCURY; COLLOIDS; HG SPECIATION; ULTRAFILTRATION; CROSS-FLOW FILTRATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
54
Recensione:
Indirizzi per estratti:
Citazione:
J.L. Guentzel et al., "MERCURY ASSOCIATED WITH COLLOIDAL MATERIAL IN AN ESTUARINE AND AN OPEN-OCEAN ENVIRONMENT", Marine chemistry, 55(1-2), 1996, pp. 177-188

Abstract

We have used traditional filtration and tangential flow ultrafiltration to isolate mercury into 4 size fractions: particulate (> 0.4 mu m),high molecular weight (> 10 kD, 1kD = 1000 daltons), medium molecularweight (1-10 kD), and low molecular weight (< 1 kD). Samples with varying salinities were collected from the Ochlockonee River/Estuary in January 1993 and 1994. A small set of open-ocean samples was collected and processed during the 1993 Baseline Survey Expedition for Trace Contaminants in the Atlantic Ocean, sponsored by the Intergovernmental Oceanographic Commission (IOC). Concentrations of total dissolved Hg down the estuary ranged from 30 to 3 pM. Total dissolved Hg measurements from the IOC cruise ranged from 0.5 to 2.5 pM. Colloidal Hg (> 1 kD) represented 35-87% of the total dissolved Hg within the estuary and 10-50% of the total dissolved Hg in the North Atlantic. Equilibrium Hg speciation modeling supports speculation that colloidal Hg is bound by thiol-type functional groups associated with the colloidal organic carbon.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 15:13:52