SPECIATION AND FRACTIONATION MODELING STUDIES -- DISSOLVED ORGANIC CARBON (DOC)-MERCURY INTERACTION

BY Michael M. Reddy, and George Aiken

U.S. GEOLOGICAL SURVEY

Contents

• Abstract
• Introduction
• Materials and Methods
• Results and Discussions
• Summary
• Acknowledgment
• References

Tables

1. U3 December 1995

Photographs

1. U3 sampling site in the South Florida Water Management District Conservation Area 2A (photo by M.M. Reddy)
2. Everglades study site locations, by Jason Tregellas

Figures

1. Figure 1.A Mercury species distribution in surface water collected in South Florida Water Management District, Water Conservation Area 2 A at site U 3 in December 1995. The figure shows the pH dependence of speciation (expressed as a percent of the total dissolved mercury in solution) calculated using WHAM and PHREEQC (MINTEQ database modified to match the species present in the WHAM database).
2. Figure 1.B Mercury speciation in surface water collected in South Florida Water Management District Water Conservation Area 2 A site U 3 in December 1995. The figure shows the pH dependence of speciation (expressed as a percent of the total dissolved mercury in solution) calculated using WHAM and PHREEQC (MINTEQ database unmodified).
3. Figure 2.A Mercury species distribution in surface water collected in South Florida Water Management District Water Conservation Area 2 A site U 3 in December 1995. The figure shows the pH dependence of speciation (as a percent of the total dissolved mercury in solution) calculated using the WHAM computer program at several DOC concentrations.
4. Figure 2.B DOC - 10 mg/L.
5. Figure 2.C DOC - 35.4 mg/L.