Journal
MINERALS ENGINEERING
Volume 132, Issue -, Pages 169-174Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mineng.2018.12.013
Keywords
Phosphogypsum; Enrichment; Rare earth elements; Recrystallized Na2CO3
Funding
- Ministry of Higher Education and Scientific Research of Tunisia
Ask authors/readers for more resources
Due to their unique physicochemical properties, rare earth elements (REEs) are increasingly becoming significant in developing new technologies. Their extraction from ores and industrial wastes has attracted the interest of several researchers. Phosphogypsum (PG) is one of many industrial wastes considered as an attractive source of such elements. Since rare earths are present in small quantities in PG, the different steps of their concentration in this waste remain essential before any attempt of extraction. In the present work, after determining the content of REEs and their distribution in the phosphogypsum sample, a total rare earth enrichment of about 84% was achieved in the final solid. The method consists of a washing step with 25 g/L sodium chloride solution followed by leaching the residue with sodium carbonate solution at 90 degrees C for 1 h. A new result was discovered while examining the recrystallized Na2CO3 from the carbonated filtrate (at low temperature) with photoluminescence technique. This analysis shows the characteristic emissions of Ce3+ and Eu3+ at 374 nm and 555-612 nm respectively after selective excitations. The presence of REEs both in the final residue and in the solid recrystallized from the filtrate suggests that such elements are linked differently in the PG sample.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available