WebMar 10, 2024 · In 2003, the EPA's Florida Phosphate Initiative noted that some homes had median radiation concentration 4 to 22 times higher than pre-mined land and gamma exposure 2 to 3 times higher than normal. WebIn the United States, phosphate rock normally contains between 100-150 ppm uranium. Mining and processing of these ores redistributes much of the uranium daughters among the various products, by-products, and wastes. These materials are then widely dispersed throughout the environment.
Natural radioactivity in phosphates, phosphogypsum and natural …
Webphosphorite, also called phosphate rock, rock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, … WebFeb 5, 2013 · Chemical analyses for phosphate, fluorine, uranium oxide, calcium oxide, silica, alumina, total iron as ferric oxide, magnesium oxide, sulfate sulfur, sulfide sulfur, potassium oxide, sodium oxide, and loss on ignition were made (Table 2). Uranium oxide was the most critical component and because of its small percentage was one of the more ... small business internet speed
Phosphate Group - Definition and Functions Biology …
WebIn Florida there are radioactive elements, such as the uranium, found in the earth with the phosphate. Radon gas is part of the natural decay chain of uranium as one radioactive atom decays to another and then another until a final stable atom is reached. WebThe measurements provided in NCRP Report No.95 indicate that the raw phosphate materials (ammonium phosphate, superphosphate, diammonium phosphate, phosphoric acid, etc.) incorporated into fertilizer contain: U-238: 22-140 pCi/g (800 to 5,200 mBq/g) Th-230: 5.4-430 pCi/g (200 to 16,000 mBq/g) Ra-226: 0.7-24 pCi/g (25 to 900 mBq/g) WebSep 1, 1994 · @article{osti_54481, title = {Radioactivity of phosphate ore, superphosphate, and phosphogypsum in Abu-Zaabal phosphate plant, Egypt}, author = {Hussein, E M}, abstractNote = {A measurement of the radioactivity content of phosphate ore material, phosphatic fertilizer (superphosphate), and by-product phosphogypsum in the Abu-Zaabal … small business interruption insurance