Abstract
Some types of fertilizers may contain various amounts of natural radionuclides like 238U, 232Th, 226Ra, 40K (Kuzmanoviæ et al. in J Radioanal Nucl Chem 331(12):5825–5834, 2022. 10.1007/s10967-022-08646-x; H Hamamo et al. in J Radioanal Nucl Chem 194(2): 331–336, 1995. 10.1007/BF02038431; M García-León et al. in J Radioanal Nucl Chem 197(1): 173–184, 1995. 10.1007/BF02040229). In this study 16 samples of commercially available fertilizers produced in Poland were selected for preliminary radiological evaluation. The samples were measured by means of low background gamma spectrometry. The results showed high concentrations of 40K in potassium and multinutrient fertilizers (2.3–13.8 kBq kg−1), and relatively high concentrations of uranium and radium isotopes in phosphate fertilizers. The obtained results allowed to calculate radium equivalent activity, absorbed dose rate increase and increase in annual effective dose equivalent.
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