Question

write the balanced chemical equation:
In the preparation of phosphate fertilizers , calcium phosphate in phosphate rock is converted into phosphoric acid is calcium sulphate

Answer 1

Answer:

Phosphate rock used for fertilizer is a major NORM due to both uranium and thorium. Phosphate is a common chemical constituent of fertilizer. It is principally mined from apatite and phosphate rocks (phosphorite) in which the concentration of phosphate has been enhanced by sedimentary, igneous, weathering, and biological processes. Uranium can also be concentrated in these processes so that a high phosphate content generally coincides with high uranium content (50–300 ppm). Thorium is more likely to be present in igneous phosphorite. The radioactivity of these ores (due to uranium, thorium, and radium) can be as high as 10,000 Bq/kg. Significant phosphate mining operations take place in many countries, with large outputs from the USA, Morocco, and China, the world total being 156 Mt in 2007 (Table 2.8).