Table 2 Comparison of the activity concentration of terrestrial radionuclide with other published values
Location | Activity concentration (Bq kg−1) | References | ||
|---|---|---|---|---|
226Ra | 232Th | 40K | ||
South India (Gudalore) | 17–62 | 19–272 | 78–596 | Selvasekarapandian et al. (1999) |
NorthenIndia (Upper Siwaliks) | 28.3–81.0 | 61.2–140.3 | 363.4–1002 | Singh et al. (2005) |
Upper Egypt | 31–40 | 52–61 | 3149–3210 | Uosif (2011) |
China | 1–360 | 2–690 | 9–1800 | UNSCEAR (2000) |
USA | 4–130 | 4–140 | 100–700 | UNSCEAR (2000) |
Camroon (volcanic area) | 14.00 | 30 | 103 | M. Ngachin et al. (2008) |
Syria | 19.00 | 24 | 336 | Al-Marsi et al. (2006) |
Turkey | 28.60 | 33 | 448.5 | Turhan et al. 2012 |
Portugal (Uranium mining) | 200.00 | 91 | – | Carvalho et al. (2007) |
Eastern Germany (Ronneburg) | 370.00 | 45 | 620 | Winkelmann et al. (2001) |
Brazil (Rio Grande do Norte) | 29.20 | 47.8 | 704 | Malanca (1996) |
Cameroon (Mini-Matap) | 53–288 (125) | 59–272 (157) | 136–1269 (671) | Present study |
World average | 16–116 (33) | 7–50 (45) | 100–700 (420) | UNSCEAR (2008) |