Table 4 The comparison of the mass concentrations of U, Th and K in clay soil samples of the present study with other locations around the world

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)

Dickson and Scott (1997)

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)

Killeen (1979)

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)