Abstract
The supercritical fluid extraction (SFE) of heavy metals from acidic aqueous solution has attracted interest lately(1)-(5). In the present study1, supercritical CO2 was directly applied to lanthanide oxide as an extraction solvent. Lanthanide metals were extracted from lanthanide oxides (Nd2O3 and Gd2O3) by using supercritical CO2 including tri-n-butylphosphate (TBP) and HNO3 complex.
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