Item | Mean activity concentration Bq/kg (range) | |||
226Ra | 232Th | 40K | Country | |
1 | 7.5 (4 - 13.5) | 4.2 (2.8 - 6.7) | 27.5 (19 - 39.6) | Libya, Beach sand of Tripoli, 2008 [4] |
2 | (58.8 - 102.1) | - | - | Libya, Aljabel. Al. Gharbi-Using Portable Nuclear Radiation Detector; 2011 [5] |
3 | - | - | - | Libya, North western,2001 [6] |
4 | 26.02 (17.09 - 34.03) | 30 (11 - 64) | 400 (140 - 850) | Iraq, kurkukoil field 2006 [7] |
5 | 20.05 (10.87 - 30.94) | 16.43 (6.78 - 20.61) | 216.69 (127.74 - 272.7) | Qatar state soil in Dukhan oil field 2015 [8] |
6 | 22.03 (1.8 - 76.4) | 27.91 (6.3 - 85.5) | 285.0 (84 - 516.7) | Jordan, soil in Tafilla, 2012 [9] |
7 | 16 (46 - 115) | 10 | 370 | Kuwait before and After war 2985 [10] |
8 | (32.2 - 63.7) (5 - 13.8) | (44.3 - 95.6) (2.3 - 15.3) | (96 - 102) (29 - 582) | Egypt, Beach sand Dune 1997 [11] |
9 | 30 (2 - 110) | 25 (2 - 140) | 370 (66 - 1150) | Algeria, 2008 [12] |
10 | 23 (10 - 64) | 20 (10 - 32) | 270 (78 - 780) | Syria, phosphate rocks 1981 [13] |
11 | 12.9 (0.15 - 41) | 6.98 (4.21 - 9.92) | 278 (167.79 - 419.52) | Nigeria, Akuk, Ondo state 2001 [14] |