Radioactivity of Fertilizer and China (NORM) in Japan

Abstract

Radioactivity of 6 fertilizer samples, 7 china clay samples and 5 china glaze samples, which are commonly used in Japan, was measured using a Nal(Tl) scintillation spectrometer. Potassium activity of fertilizer was almost 540-740 Bq/kg, and the highest activity was 9,100 Bq/kg. Activity of fertilizer was 10 times higher for potassium than for uranium-series. Furthermore, these activities were 25 times for potassium and 18 times for uranium-series in comparison with those in natural soil. In china clay, activities of potassium, uranium-series nuclides and thorium-series nuclides were 543-823 Bq/kg, 74.6-94.3 Bq/kg, and 86.3-128 Bq/kg, respectively. These were 1.5-2.2, 2.1-2.6 and 2.3-3.5 times higher than activity of common soil. Activity of glaze was almost equal to that of china clay.

Hydrochemistry and Uranium Concentration in Brackish Groundwater from an Arid Zone, Chihuahua, Mexico

“…U showed a positive correlation with Cl (0.76 p<0.5) and Br (0.75 p<0.5) from minerals, corroborating zones with high dissolved ions [40]. Finally, P (0.38 p<0.5) can be associated with phosphate fertilizers that increase U concentration [49]. On the other hand, U shows a negative correlation with T (-0.80 p<0.5).…”