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Removal of 230 Th and other Metals from Sulphuric Acid Leach Uranium Mill Solution by Solvent Extraction, Adsorption and Precipitation
Author(s) -
Nirdosh I.,
Vogl A. K.,
Carroll S. M.
Publication year - 1994
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500020209
Subject(s) - uranium , chemistry , adsorption , diluent , extraction (chemistry) , freundlich equation , inorganic chemistry , precipitation , nuclear chemistry , kerosene , solvent , solvent extraction , metal , chromatography , materials science , metallurgy , organic chemistry , physics , meteorology
230 Th and other metals were removed from the Key Lake (Saskatchewan) uranium mill leach solution by three methods. First, solvent extraction with D2EHPA, TBP and Primene JMT in kerosene diluent. Second, by adsorption on MnO 2 and clays. Third, using metal hydroxides after they were precipitated out from the leach solution. It was found that complete removal was possible with either 5 vol% Primene JMT (plus 5 vol% iso‐decanol) in 90 vol% kerosene, or by adsorption onto clays, or with hydroxides precipitated at pH > 2.4. Both 230 Th and 226 Ra adsorption on clay conformed to the Freundlich isotherm.