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Treatment of phosphogypsum waste using suitable organic extractants
Faculty
Science
Year:
2012
Type of Publication:
Article
Pages:
907-914
Authors:
El-Didamony, H, Awwad, N. S, Fawzy, M. M, Attallah, M. F, Ali, M. M
DOI:
10.1007/s10967-011-1547-3
Journal:
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY SPRINGER
Volume:
291
Research Area:
Chemistry; Nuclear Science \& Technology
ISSN
ISI:000300295800045
Keywords :
Phosphogypsum waste, Leaching process, Sebaiya rock, Radioactive materials, Organic extractants
Abstract:
Phosphogypsum (PG) is a residue of the phosphate fertilizer industry that has relatively high concentrations of harmful radioactive materials. The reduction in concentration of the radionuclides from PG was investigated. The removal process is based on leaching of radionuclides using suitable organic extractants. The studied radionuclides were Ra-226, Pb-210, U-238 and K-40. The factors affect the leaching process such as type of leaching materials, contact time, concentration of the desired solvent, liquid to solid ratio, and temperature were studied. Based on the experimental results, about 71.1, 76.4, 62.4, and 75.7\% of Ra-226, Pb-210, U-238 and K-40 respectively were successfully removed from the PG. The reduction in the concentration of radionuclides was accompanied by reduction in the concentration of rare earth elements (aREE) equals to 69.8\%. Using the desired organic extractant under optimum conditions for treatment of the PG waste leads to obtain a decontaminated product that can be safely used in many industrial applications.
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