RADIOLOGICAL IMPACT OF FERTILIZERS: PRODUCTION AND USE - Fertilizers: Components, Uses in Agriculture and Environmental Impacts - page 283

Table 1. Range of activity level of naturally occurring radionuclides, expressed in Bq·kg -1 in phosphate rock from different countries.
The uranium and thorium contents reported in ppm were converted to activity levels using the factors 9.28·10 -5 and 2.46·10 -4 g·Bq -1 for
238 U and 232 Th respectively

Country

U series Th series

40 K

References

238 U 234 U 230 Th 226 Ra 210 Pb 210 Po 232 Th 228 Ra

(Fourati et al., 1988; Pantelica et
al., 1997; IAEA, 2003; Roselli et
al., 2009; Cevik et al., 2010;
Lakehal et al., 2011)

Algeria 511-1295 --- --- 250-1150 --- --- 6.2-733 --- 1.4 -260

Australia 15-900 --- --- --- --- --- 5-47 28-900 --- (IAEA, 2003)

(IAEA, 2003; Saueiaet al., 2005;
Saueia et al., 2006)

Brazil 14-1868 320-1841 270-1694 53-1518 < 19-1698 --- 56-753 57-1550 < 45-87

Canada 1293 --- --- --- --- --- 26 --- --- (Luther et a., 1993)

Chile 40 --- --- --- --- --- 30 --- --- (IAEA, 2003)

(Azouazi et al., 2001; Falk et
al.,2006)

China 150-1100 --- --- 150 --- --- 25 --- ---

(IAEA, 2003, Mourad et al., 2009;
Cevik et al., 2010; El-Taher et al.,
2010; Falk et al., 2006)

Egypt 244-1520 --- --- 700 --- --- 10-49 1700 32-186

Finland 10 --- --- --- --- --- 10 --- 110 (Mustonen,1985)

(Fourati et al., 1988; Pantelica et
al., 1997; IAEA, 2003; Roselli et
al., 2009; Falk et al., 2006)

Former Soviet
Union

44-915 --- --- 126 --- --- 78-100 --- 55

(Pantelica et al., 1997;
Papastefanou, 2001; IAEA, 2003)

Israel 1497-1800 --- --- 1801 --- --- 2-6.8 --- ---

Jordan 450-1850 --- --- 958 --- --- --- --- --- ( Papastefanou, 2001;IAEA, 2003)

(Barišić et al., 1992; Bolívar et al.,
1995; Bolívar et al., 1996;
Pantelica et al., 1997; Azouazi et
al., 2001; IAEA, 2003; Bolívar et
al., 2009; Roselli et al., 2009;
Cevik et al., 2010; Falk et al.,
2006)

Morocco 1005-1700 1043-1680 1490-1670 1025-1700 1440-1660 984-1303 5-200 16-22 < 36 -119

Nigeria --- --- --- 617 --- --- --- --- 324 (Okeji et al., 2012b)

Northern Africa 446-2530 --- --- 737-1650 --- --- --- 7.7-12.5 22-91 (Bituh et al., 2009)

(Khan et al., 1998; Javied et al.,
2010)

Pakistan 62-771 --- --- 59-744 --- --- 19-112 --- 104-360

(Barišić et al., 1992; Bolívar et al.,
1995; Bolívar et al., 1996; IAEA,
2003)

Senegal 705-1996 745 --- 1025-1370 --- 984 67 9-12 < 30

South Africa 100-200 --- --- --- --- --- 483-564 --- --- (IAEA, 2003)

Sudan 147-13745 149-14877 152-12487 153-15377 --- 87-15084 0.8-22.3 --- 13.7-332 (Sam et al.1999)