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One step purification of impurities in the leachate of weathered crust elution-deposited rare earth ores
It is necessary to control and reduce the high content of Al 3+ , Cu 2+ and Pb 2+ ions in the leachate of weathered crust elution-deposited rare earth ore to facilitate the rare earth recovery and the quality of rare earth products. Neither NH 4 HCO 3 nor Na 2 S are suitable for removal of all impurity ions and meanwhile maintain high rare earth recovery. Conventionally, NH 4 HCO 3 is firstly adopted to remove Al 3+ , and then Cu 2+ and Pb 2+ are removed by using Na 2 S. This two stepsdoi:10.5277/ppmp170239 fatcat:gcptni7cavhqthxrbtbud6tc4q