EFFECT OF THE PHYSICOCHEMISTRY OF SURFACE WATERS AT NEUTRAL PH ON THE 241-AM UPTAKE BY THE SNAIL LYMNAEA STAGNALIS L.
The effect of the physicochemistry of six surface waters at pH 7 on the accumulation of 241-Am by Lymnaea stagnalis L. through the contamination route water snail was studied in a number of investigations each lasting 4 days. The whole body concentration factors (CF's) of the pond snail were affected by the water type, changing the Am uptake by a factor of 2 at the end of the experimental period. Using the Spearman's rank correlation test, the CF's of L. stagnalis were not found to be significantly (P <- 0.05) related to the chemical species of the radionuclide in the water. However, an inverse trend was observed between the CF's after 4 days and the sodium (r-s = - 0.8857) and potassium (r-s = -0.8286) content of the surface waters. The most significant correlation (r-s = -0.9000) was found with the specific conductivity, which reflects the total electrolyte concentration in the water. Thus, the transuranic seems to follow the assimilation of minerals, which is high in oligotrophic systems and reduced in eutrophic waters. The observed differences could also be caused by a competition between 241-Am and other ions present in the surface waters.
Bibliographic Reference: SEMINAR ON THE ENVIRONMENTAL TRANSFER TO MAN OF RADIONUCLIDES RELEASED FROM NUCLEAR INSTALLATIONS, BRUXELLES (BELGIUM), OCT. 17-21, 1983 VOL. I, PP. 263-271 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31212 ORA
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Record Number: 1989124018500 / Last updated on: 1987-01-01
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