Al-Masri M S, Al-Hamwi A, Amin Y, Safieh M B, Zarkawi M, Soukouti A, Dayyoub R, Voigt G, Fesenko S
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria.
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria.
J Environ Radioact. 2014 Jun;132:8-14. doi: 10.1016/j.jenvrad.2014.01.009. Epub 2014 Feb 7.
The transfer of (137)Cs, (85)Sr, (131)I, (210)Po, (210)Pb and (238)U from feed to camel's milk was investigated in a pilot experiment with three lactating camels. For a period of 60 days, the animals were fed on spiked feed containing the studied radionuclides. They were subsequently returned to a contamination-free diet and monitored for another 90 days. The activity concentrations of (137)Cs, (85)Sr and (131)I in milk decreased with time and reached background levels after 20 days. Equilibrium transfer coefficients and biological half-lives were estimated and transfer coefficients were calculated as (8.1 ± 3.6) × 10(-4), (4.4 ± 1.6) × 10(-2), (7.8 ± 3.9) × 10(-4), (2.7 ± 3.5) × 10(-4), (1.8 ± 1.5) × 10(-4) and (7.0 ± 3.6) × 10(-3) d L(-1) for (85)Sr, (131)I, (137)Cs, (210)Po, (210)Pb and (238)U, respectively. The biological half-lives were estimated to be 6.4, 4.2, 8.9, and 53.3 days for (85)Sr, (131)I, (137)Cs, and (238)U, respectively. Estimates of the half-lives were based on a one component model: it was found that the half-life values measured for artificial radionuclides were slightly shorter than those for natural radionuclides. The data obtained in the study are the first published experimental data on radionuclide transfer to camel milk.
在一项针对三头泌乳骆驼的中试实验中，研究了（137）铯、（85）锶、（131）碘、（210）钋、（210）铅和（238）铀从饲料到骆驼奶中的转移情况。在60天的时间里，给这些动物喂食添加了所研究放射性核素的饲料。随后，让它们恢复食用无污染物的饮食，并再监测90天。牛奶中（137）铯、（85）锶和（131）碘的活度浓度随时间下降，并在20天后达到背景水平。估算了平衡转移系数和生物半衰期，并计算出（85）锶、（131）碘、（137）铯、（210）钋、（210）铅和（238）铀的转移系数分别为（8.1 ± 3.6）× 10^(-4)、（4.4 ± 1.6）× 10^(-2)、（7.8 ± 3.9）× 10^(-4)、（2.7 ± 3.5）× 10^(-4)、（1.8 ± 1.5）× 10^(-4)和（7.0 ± 3.6）× 10^(-3) d L^(-1)。（85）锶、（131）碘（137）铯和（238）铀的生物半衰期分别估计为6.4天、4.2天、8.9天和53.3天。半衰期的估计基于单组分模型：发现人工放射性核素测得的半衰期值略短于天然放射性核素的半衰期值。该研究中获得的数据是关于放射性核素转移到骆驼奶的首批已发表实验数据。
