SORPTION AND RETENTION OF CERTAIN RADIONUCLIDES BY SOME FRESH WATER BIOTA PART I : BIOMPHALARIA ALEXANDRINA.

SORPTION AND RETENTION OF CERTAIN RADIONUCLIDES

BY SOME FRESH WATER BIOTA

PART I : BIOMPHALARIA ALEXANDRINA.
W.E. Y. ABDEL MALIK AND M.M. ISHAK·.

Radiation Protection Department, Nuclear Research Centre

Cairo, Egypt.

*Institute of Oceanography and Fisheries, Cairo, Egypt.

ABSTRACT
The. uptake of 134Cs, 89Sr and 60Co from. contaminated water
by the fresh water snail B1011Phalar1a alexandr1na as well as
the release of these radionuclides from the contaminated snail
were studied. It was found that the uptake of the radionuclldes
increased with contact time up to 4 days, and the rate of uptake
was 60Co > 89Sr > I34Cs.
Retention of these radionuclides by the snail was found to
decrease with the increase of contact time in fresh water and
the percentage release followed the order I34Cs > 89Sr > 60Co.