Environ. Sci. Technol. 2004, 38, 3810-3819
Physical and Kinetic Speciation of Copper and Zinc in Three Geochemically Contrasting Marine Estuaries MARTIN M. SHAFER,* STEPHEN R. HOFFMANN, JOEL T. OVERDIER, AND DAVID E. ARMSTRONG Environmental Chemistry and Technology Program, University of WisconsinsMadison, 660 North Park Street, Madison, Wisconsin 53706
The physical and kinetic speciation of Cu and Zn in three impacted marine estuaries was examined. Contrasts in sources of metal-binding ligands, solution chemistry, and hydrologic forcing between and within the three study systems (Cape Fear River Estuary, North Carolina; NorfolkHampton Roads-Elizabeth River, Virginia; San Diego Bay, California) were exploited to enhance our understanding of Cu and Zn speciation. Trace metal-optimized tangentialflow ultrafiltration at 1 kDa nominal molecular weight limit (NMWL) was used to fractionate
