Determination of Radioactive Contamination of Plant Fertilizers Using CR-39

The aim of this research is to study the fertilizers that are widely used due to what they can cause of an increment in natural radioactive level of soil, and due to what will affect the increase in the environmental contamination level with radiation.
The concentrations of (Rn-222) and (U-238) of seven kinds of local and imported fertilizers are calculated.
In the present work an investigation has been performed using nuclear track detectors (CR-39) technique with the use of test tubes (2.0-2.1 cm) in diameter. The chemical etching is utilized by NaOH with normality (6.25 N) at (70 oC 1oC) temperature and (4hrs) etching time.
The obtained results indicate that there is a remarkable increase in Radon and Uranium concentrations especially, the Iraqi fertilizers with both kinds of compound and compound -27, while the concentrations of Radon and Uranium for other types are approximately the same, except that of Sulphar fertilizer which shows a lower concentration.