THE BIOAVAILABILITY OF THE TRANSURANIC ELEMENTS 237-PU AND 241-AM FOR THE POND SNAIL, LYMNEA STAGNALIS L., AND THEIR BEHAVIOUR IN SELECTED NATURAL SURFACE WATERS
An attempt was made to characterize the bioavailability of 237-Pu and 241-Am for the pond snail Lymnaea stagnalis L, in selected surface waters. The uptake, distribution and retention patterns were studied through the contamination route water snail. The effects of a number of parameters, such as seasonal variation, water type (pH, conductivity, ionic composition) and presence of food, on the bioavailability of the transuranics were evaluated. Finally, an assessment was made concerning the chemical speciation of plutonium and americium in the selected freshwaters. It was shown that L. stagnalis quickly accumulates both transuranics from the water, yielding whole body concentration factors between 40 and 900 after several days. The concentration factors in the organs generally display the same decreasing pattern: shell margin > shell > gastrointestinal (G.I.) tract > hepatopancreas > foot muscle approximately equal to soft tissues > blood. The findings, although based on a limited number of variables and pertaining to a relatively simple microcosm, might aid in identifying the more important processes which govern the bioavailability of transuranics.
Bibliographic Reference: EUR 8683 EN (1983) MF, 299 P., BFR 360, BLOW-UP COPY BFR 1495, EUROFFICE, LUXEMBOURG, POB 1907
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Record Number: 1989122013800 / Last updated on: 1987-01-01
Available languages: en