1985 Volume 58 Issue 12 Pages 3602-3605
Uranium(VI) was extracted between pH 2.5 to 6.0 from 0.01 mol dm−3 malonic acid on a column of silica gel with Amberlite LA-1 as the extractant. It was stripped from the column with 1–2 mol dm−3 of hydrochloric, sulfuric, and nitric acids. Uranium(VI) was separated from alkali, alkaline earths, manganese, iron, cobalt, nickel, zinc, yttrium, lanthanum, cerium in binary mixtures by exploiting the difference in the pH of formation of malonato complexes. Uranium was separated from zirconium, hafnium, thorium, scandium, and titanium by taking its advantage of stability of chloro or sulfato complexes. The method was tested for the standard reference rock samples.
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