Citation: Xiao Jin YANG, Zhong Mao GU, Shu Yu BAI, De Xi WANG. EXTRACTION AND PRECONCENTRATION OF SCANDIUM FROM AQUEOUS SOLUTION BY ELECTROSTATIC PSEUDO LIQUID MEMBRANE[J]. Chinese Chemical Letters, ;1994, 5(8): 681-684. shu

EXTRACTION AND PRECONCENTRATION OF SCANDIUM FROM AQUEOUS SOLUTION BY ELECTROSTATIC PSEUDO LIQUID MEMBRANE

China Institute of Atomic Energy, P. O. Box 275-93, Beijing 102413

Received Date: 23 May 1994

Electrostatic Pseudo Liquid Membrane (ESPLIM),developed in this laboratory,is a novel chemical separation technique.In this paper,a study has been conducted on extraction and preconcentration of scandium from dilute aqueous solution by ESPLIM.The effects were studied on the scandium extraction of the extractant,applied field,the pH value of feed and scandium concentration in the feed.The extraction efficiency of scandium from feed containing 25-100 mg/L of scandium was more than 99%.and scandium was concentrated from 21.64 mg/L in the feed to 2474 mg/L in the concentrate,giving a concentration factor of 114.The experimental results demonstrated that the concentration of scandium in the organic phase was much lower than its equilibrium concentration in the solvent extraction,which confirms the nonequilibrium feature of the ESPLIM process.ESPLIM seems to be a very convenient,effective and economic method for extracting and preconcentrating scandium.
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