Distribution of natural and artificial radionuclides in chernozem soil/crop system from stationary experiments

Sarap, Nataša B.; Rajačić, Milica M.; Đalović, Ivica G.; Šeremešić, Srđan I.; Đorđević, Aleksandar R.; Janković, Marija M.; Daković, Marko Z.

Distribution of natural and artificial radionuclides in chernozem soil/crop system from stationary experiments

2016

The present paper focuses on the determination of radiological characteristics of cultivated chernozem soil and crops from long-term field experiments, taking into account the importance of distribution and transfer of radionuclides in the soil-plant system, especially in agricultural cropland. The investigation was performed on the experimental fields where maize, winter wheat, and rapeseed were cultivated. Analysis of radioactivity included determination of the gross alpha and beta activity as a screening method, as well as the activities of the following radionuclides: natural (²¹⁰Pb, ²³⁵U, ²³⁸U, ²²⁶Ra, ²³²Th, ⁴⁰K, ⁷Be) and artificial (⁹⁰Sr and ¹³⁷Cs). The activities of natural and artificial (¹³⁷Cs) radionuclides were determined by gamma spectrometry, while the artificial radionuclide ⁹⁰Sr was determined by a radiochemical analytical method. Based on the obtained results for the specific activity of ⁴⁰K, ¹³⁷Cs, and ⁹⁰Sr, accumulation factors for these radionuclides were calculated in order to estimate transfer of radionuclides from soil to crops. The results of performed analyses showed that there is no increase of radioactivity that could endanger the food production through the grown crops.

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