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Information × Registration Number 0223U005207, 0122U001794 , R & D reports Title Scientific substantiation and development of new measures to reduce radioactive contamination of fish by 90Sr and 137Cs popup.stage_title Head Kashparov Valerii O., Доктор біологічних наук Registration Date 18-12-2023 Organization National University of Life and Environmental Sciences of Ukraine popup.description2  The aim of the research project is scientific substantiation and development of new measures to reduce radioactive contamination of fish by 90Sr and 137Cs in real conditions in order to solve the problem of obtaining products, which correspond to the permissible levels, for radiation protection of population in radioactively contaminated areas. The addition of clean feed containing 0.1 % or 1 % potassium ferric hexacyanoferrate (KFCF) KFe[Fe(CN)6], resulted in 2.4±0.4 or 4.2±0.7 times lower activity concentration of 137Cs in muscle tissue of the silver Prussian carp (Carassius gibelio (Bloch, 1782)) compared to control fish with clean feed without KFCF and in 7-16 or 12-27 times lower activities compared to fish without additional clean feeding. After 18 weeks exposure, 137Cs levels in all the caged fish except for the control group were below the European permissible level (600 Bq kg-1) for consumption. In contrast, KFCF did not affect the intake of 90Sr in fish, although additional feed increased the growth rate and thereby accumulation in bone tissues. Hence, the use of clean feed containing KFCF is judged to be an effective and inexpensive countermeasure to reduce the 137Cs contamination of edible fish muscles. A statistically significant (p<0.01) effect of KFCF on the rate of removal of radiocesium from the body of fish was established, which was almost 2 times higher than the rate of removal in the case of using only pure feed without KFCF. It was found that transferring tench (Tinca tinca (Linnaeus, 1758)) from one of the most contaminated lakes to a cage in the “clean” Lake for 45 days did not lead to a significant decrease in 90Sr content in both bone and muscle tissues. Establishing permissible levels of 90Sr concentration only in fish fillet, and not in the whole fish body (with bone tissue), is appropriate for human radiation protection, since the retention factors of 90Sr treatment for boiled bone tissue of the silver Prussian carp from the Chornoby Product Description popup.authors Holiaka Dmytrii M. Hrechaniuk Maksym О. Zhurba Maryna A. Levchuk Sviatoslav Ye. Pavlenko Polina M popup.nrat_date 2023-12-18 Close