RADIOLOGICAL IMPACT OF FERTILIZERS: PRODUCTION AND USE - Fertilizers: Components, Uses in Agriculture and Environmental Impacts - page 287

Table 4. Range of activity level of naturally occurring radionuclides, expressed in Bq·kg -1 in different types of fertilizer. 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 total uranium
and thorium, respectively. TSP: Triple Super Phosphate. SSP: Single Super Phosphate. MAP: monoammonium phosphate. DAP:
diammonium phosphate

U series Th series

40 K

Fertilizer type References

238 U 226 Ra 210 Pb 232 Th 228 Ra

(Mustonen et al., 1985; Barisic et al., 1992; Righi et al., 2005; Saueia et
al., 2005; Chandrajith et al., 2011; Chauhan et al., 2013)

NPK 66-1710 1.5-451 78-741 28-307 <2-10 25-4100

(Makweba et al., 1993; Barisic et al., 1992; Alam et al., 1997; Khan et
al., 1998; Saueia et al., 2005; Chandrajith et al., 2011; Javied et al.,
2011)

TSP 62-7024 122-5022 198 16-698 10-23 91-362

(Makweba et al., 1993; Alam et al., 1997; Khan et al., 1998; Saueia et
al., 2005; Chauhan et a., 2013)

SSP 95-3879 499-3394 1255 7-434 87-491

MAP 91-3217 8-620 37 75-231 3-11 118 (Barisic et al., 1992; Khan et al., 1998; Saueia et al., 2005)

(Alam et al., 1997; Khan et al., 1998; Saueia et al., 2005; Chauhan et al.,
2013)

DAP 97-374 75-578 ---- 28-198 ---- 44-74

Nitrophos 130-298 308-501 ---- 15-163 ---- ---- (Khan et al., 1998)

Urea 70-273 5.4-73 ---- 202 ---- 3-7.9 (Alam et al., 1997; Chandrajith et al., 2011; Chauhan et al., 2013)

Potash ---- 17-34 ---- 95 ---- 12628-17143 (Alam et al., 1997; Chauhan et al., 2013b)

Zinc sulphate ---- 4.8-37 ---- 25 ---- 16-245 (Alam et al., 1997; Chauhan et al., 2013b)