(full paper is archived in the Miller Library)
Title: The codistillation, transfer, and adsorption of C14-DDT in a sea water system
Student Author(s): McCarthy, Patricia K.
Location: Final Papers Biology 175H
Date: June 1969
Abstract: Preliminary investigations using radioactively labeled DDT indicate that 50-90% of the DDT at a low concentration in water is codistilled with as little as 5-20% loss of water by evaporation over a 48 hour period. Under a constant air flow as much as 15% of this loss is recovered by water and particulate material of a second solution placed in series. Particulate matter in the second solution concentrates DDT 1000 to 50,000 times the level in the ambient water, depending both on the surface area and nature of the particles. Experiments with the bay mussel, Mytilus edulis sugges that filter feeders can readily incorporate DDT from water and particulate matter. These results indicate that codistillation and air currents may important in transporting significant quantities of DDT to the marine environment where it may enter the food chain. The variation of levels of DDT on glassware, suspended particles, and in the sea water suggest that an equilibrium exists between the DDT adsorbed on various materials that are found in the surrounding water.