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Phosphogypsum Processing for Rare Earths Recovery—A Review
As a by-product from the phosphate fertilizer industry Phosphogypsum (PG) was considered a potentially valuable source of the rare earth elements (REEs). Because of trace concentration of REEs in the PG (normally <0.1% wt) and also their tiny and complex occurrence phases the recovery process would be highly challenging in both technology and economy. The studies on occurrences of REEs, REE recovery by physical methods and leaching using different lixiviants such as inorganic acids, H 2 SO 4 ,doi:10.4236/nr.2019.109021 fatcat:woednptn5feolh3oldeitgutda