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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Treatment of phosphogypsum waste produced from phosphate ore processing
Journal of Hazardous Materials, Volume 244-245, Year 2013
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Description
Phosphogypsum (PG), primary byproduct from phosphoric acid production, is accumulated in large stockpiles and occupies vast areas of land. Phosphogypsum is a technologically enhanced naturally occurring radioactive material (TE-NORM) that contains radionuclides from 238U and 232Th decay series which are of most radio-toxicity. The reduction in concentration of radionuclides content from PG was based on leaching of 226Ra, 210Pb, 238U and 40K using tri-butyl phosphate (TBP) and tri-octyl phosphine oxide (TOPO) in kerosene. The factors which affect the leaching process such as contact time, concentration of the solvent and temperature were optimized. Based on the experimental results, about 92.1, 88.9, 83.4, 94.6% of 226Ra, 210Pb, 238U and 40K 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 (∑REE) equals to 80.1%. 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. © 2012 Elsevier B.V.
Authors & Co-Authors
El.Didamony, Hamdy A.
Egypt, Zagazig
Faculty of Science
Gado, H. S.
Egypt, Cairo
Nuclear Materials Authority
Awwad, Nasser Sayed
Egypt, Cairo
Egyptian Atomic Energy Authority
Saudi Arabia, Abha
King Khalid University
Fawzy, Mona Mohamed
Egypt, Cairo
Nuclear Materials Authority
Attallah, Mohamed F.
Egypt, Cairo
Egyptian Atomic Energy Authority
Statistics
Citations: 94
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1016/j.jhazmat.2012.10.053
ISSN:
03043894
e-ISSN:
18733336