Experimental measurement of natural radionuclide contents in phosphoric fertilizers

The objective of this work is to analyze and to define fundamental aspects of the contents of natural radionuclides in the phosphoric fertilizations and its primary material. The results of experimental measurements show that in phosphoric fertilizers produced by Gomel chemical factory there is null quantity of Ra 226 and exists slightly increased content of Th 232. In addition, the amount of Th 232 in fertilizers depends on technological particularities of primary products reprocessing. It is almost impossible to reveal any regularities in quantitative amount of natural radionuclides in mineral fertilizers because of lack of measurements; it's possible only to speak of approximate contents. Taking in consideration the well-known fact that in Belarus maximal contents of natural radionuclides in natural objects does not exceed 40 Bq/kg, their activity in samples of mineral fertilizers can be classified as anomalous. Experimental measurement of natural radionuclide contents in phosphoric fertilizers shows good agreement with other authors. (authors)