Natural sepiolite efficiency in reducing 137Cs transfer and deposition into meat and edible organs of broiler chickens

Abstract

The objectives of the present study were to examine the level of radiocesium deposit in meat and edible organs of broiler chickens as well as to investigate efficiency of natural sepiolite in reducing 137Cs deposition in meat, liver and gizzard of alimentary contaminated broiler chickens. Broiler chickens (six weeks of age) were fed with the standard diet and each broiler was given a single oral dose of 137Cs, total activity of 3750 Bq. The broilers were divided into two groups (10 broilers per group). The group 1 was control (received only radiocesium). The broilers of the group 2, in addition to radiocesium received natural sepiolite solution (2 g sepiolite per bird). After 24 hours, all broilers, from each group, were stunned and killed. The samples of meat, (breast and legs), liver and gizzard were taken from each broiler, for gamma spectrometry determination of radiocesium activity. After 24 hours of contamination, 56 % of introduced 137Cs radioactivity was deposited in the meat (breast and legs muscles), 1 % in the liver and 2,4 % in the gizzard of broiler chickens 42 days of age. Natural sepiolite demonstrated insufficient protective action. Compared to the control group, percentage reduction (decreasing percentage) of 137Cs deposition in meat was 16%, in liver 5% and in gizzard 12%.

Cilj ovog rada je bio da se ispita stepen deponovanja radiocezijuma u mesu i jestivim organima brojlerskih pilića, kao i da se ispita efikasnost prirodnog sepiolita u smanjenju deponovanja 137Cs u mesu, jetri i bubcu, alimentarno kontaminiranih pilića. U radu su koriščeni brojlerski plići (Hubbard) uzrasta 42 dana, koji su dobili po jednu oralnu dozu 137Cs, ukupne aktivnosti 3750 Bq. Pilići su podeljeni u dve grupe (po 10 jedinki u grupi). Grupa 1 je bila kontrolna (dobijala je samo 137Cs). pilići grupe 2, pored radiocezijuma dobijali su, istovremeno, i rastvor sepiolita (2 g sepiolita po piletu). Posle 24 sata, izvršeno je žrtvovanje svih pilića. Uzorci celokupnog mesa (mišići grudi i nogu zajedno), jetre i bubca su uzimani od svakog pileta za gamaspektrometrijsko određivanje nivoa aktivnosti radiocezijuma. Ustanovljeno je da 24 sata posle kontaminacije, u odnosu na unetu aktivnost, u mesu se deponuje 56 % radiocezijuma, u jetri 1 % a u bubcu 2,4 %. Prirodni sepiolit ispoljio je nedovoljnu efikasnost zaštite. U odnosu na kontrolnu grupu, procenat smanjenja deponovanja 137Cs u mesu je bio 16%, u jetri 5% a u bubcu 12%.