Location | U (ppm) | Th (ppm) | K (%) | Reference | |
---|---|---|---|---|---|
Albania* | 0.48-7.68 (1.84) | 0.98-39.5 (5.93) | 0.05-3.75 (1.17) | UNSCEAR (2000) | |
Australia | Rock | 2.1-3.6 (2.5) | 18-55 (15) | 2.4-3.8 (2.4) | |
Soil | 1.6-3.8 (2.2) | 6-19 (1.3) | 0.7-1.9 (1.3) | ||
Bulgaria* | 0.64-15.2 (3.2) | 1.73-39.5 (7.41) | 0.05-3.75 (1.17) | UNSCEAR (2000) | |
Canada (Rock) | 0.8-16.4 (4.1) | 1.1-41.0 (11.9) | 1.0-6.2 (3.1) | ||
Cyprus* | 0.08-7.2 (1.2) | 0.25-13.1 (2.72) | 0.04-2.91 (0.58) | Tzortzi et al. (2003) | |
Italy* | 0.16-5.6 | 0.25-16.8 (5.43) | 0.03-5.14 (1.41) | Chiozzi et al. (2002) | |
Egypt* | 0.48-9.6 (2.96) | 0.49-23.7 (4.45) | 0.09-2.12 (1.04) | UNSCEAR (2000) | |
Jordan* | 1.76-8.32 (6.72) | 5.18-25.4 (20.2) | 0.45-1.96 (1.82) | Al-Jundi et al. (2003) | |
Serbia and Montenegro | 1.2-6.24 (2.76) | 4.45-21.0 (10.4) | 0.88-2.99 (1.98) | Dragovic et al. (2006) | |
USA* | 0.32-11.2 | 0.98-32.1 (8.20) | 0.32-2.28 (1.21) | Myrick et al. (1983) | |
World Average | 2.64 | 11.1 | 1.37 | Dragovic et al. (2006) | |
Present study | 1.2-4.1 (2.7) | 2.7-8.2 (4.9) | 0.1-1.63 (0.7) |