Modeling Cd partitioning in oxic lake sediments and Cd concentrations in a freshwater bivalve
Conference
·
OSTI ID:42899
The author measured cadmium concentrations in the biotic (soft tissues of a freshwater bivalve) and abiotic (oxic sediments and overlying water, diagenetic iron and manganese oxides) compartments of a large number of lakes. The lakes encompass a large range in pH and in Cd concentrations, and are distributed over a geographical area of about 350,000 km{sup 2}. The distribution of Cd between the sediments and the overlying water can be described by sorption to a limited number of sedimentary phases; apparent binding constants of Cd to these phases can be determined from in situ measurements. This approach is somewhat similar to that of ``Trace Metal Equilibrium Partitioning`` which has been considered by the US EPA for the development of sediment quality criteria. The author shows that the binding constants, together with the abundance of the sorbing phases, total sedimentary cadmium concentration and water pH, can be used to predict successfully cadmium accumulation in the freshwater bivalve.
- OSTI ID:
- 42899
- Report Number(s):
- CONF-9410273--
- Country of Publication:
- United States
- Language:
- English
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