DOI: 10.36871 / vet.san.hyg.ecol.202102019
UDC 619: 614.9: 615.9
Authors
Zhorov G.А.
Zakharova L.L.
Obryvin V.N.
All-Russian Research Institute of Veterinary Sanitation, Hygiene and
Ecology – Branch of Federal State Budget Scientific Institution
«Federal Scientific Center – K.I. Skryabin, Ya.R. Kovalenko
All-Russian Research Institute of Experimental
Veterinary Medicine, Russian Academy of Sciences»
Moscow, Russian Federation
Abstract
For correctly assess the effectiveness and safety of the use of sorption-detoxifying
agents and feed additives intended for animals receiving feed with an excess content
of toxicants, it is necessary to take into account the background levels of radionuclides,
toxic elements, pesticides and other technogenic and natural pollutants in the studied
substances. The need for such studies is due both to the existence of areas with a naturally
elevated level of natural toxicants in the sources of raw materials for the production
of additives and drugs, and to the increasing anthropogenic influence, accompanied
by the entry of xenobiotics into environmental objects.
In series of radiometric studies, the specific activity of technogenic and natural
radioactive isotopes (90Sr, 137Cs, 40К, 226Ra, 232Th) in a number of sorption-detoxifying
and biologically active substances and preparations used in animal husbandry
and veterinary medicine as part of feed additives and pharmacological agents was
determined. It was found that in 43% of the studied samples, the level of specific
activity of 1,1Sr in 3-90 times higher than allowed by the current standards. The
maximum level of 90Sr, equal to (137±9) Bq/kg, was detected in perlite. The specific
activity of 137Cs did not exceed the permissible level: in mineral sorbents its
amount reached (40±7) Bq/kg, in organic and complex sorbents – (24±4), and in
feed additives – (29±8) Bq/kg. The maximum levels of 40K were (1429±83) Bq/ kg
in minerals (radionite) and (2613±100) Bq/kg in organic substances (lignohumate).
The levels of 226Ra and 232Th did not exceed (153±13) and (79±13) Bq/kg, respectively,
and were higher in the mineral samples.
Keywords
radioactive substances, specific radioactivity, detoxifying substances, feed additives, rationing.