Kinetic determination of biota-sediment accumulation factor for PCB-52 using closed two and three-compartment models
Conference
·
OSTI ID:398211
- Northeast Louisiana Univ., Monroe, LA (United States)
- Army Waterways Experiment Station, Vicksburg, MS (United States)
Closed two and three-compartment models were used to generate intercompartmental transfer rate constants describing the distribution of PCB-52 between fish and sediment in separate (fish-water and sediment-water) and simultaneous (fish-sediment-water) exposure systems. Japanese Medakas or Golden Shiners and suspended sediment from Barataria Bay or Brown`s Lake were exposed to [{sup 14}C]PCB-52 in a stirred non-constant design. After various time intervals (1 to 120 h), water, fish and sediment were analyzed for total radioactivity, For all systems, uptake of PCB by sediment and fish and decline of water concentration were rapid, An initial rapid increase in sediment concentration was followed by a gradual decrease which was reflected in a similarly gradual uptake by the fish. Nonlinear regression (PCNOLINS{reg_sign}) was used to calculate first-order transfer rate constants of 0.107--0.608 h{sup {minus}1} for water-to-sediment, 0.105--0.037 h{sup {minus}1} for water-to-fish, 0.0035--0.115 h{sup {minus}1} for fish-to-water and 0.090--0.557 h{sup {minus}1} for sediment-to-water. Normalization of the transfer rate constants to sediment organic carbon and fish lipid provided BSAFs for PCB-52 of 3.01 to 3.54. Short term exposures and kinetic modeling can be used to estimate the BSAF for PCB-52 and other neutral organic chemicals.
- OSTI ID:
- 398211
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
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