Abstract
Abstract Studies have been made of variables such as reagent concentration, acid concentration, pH, mixing time, settling time, volume ratio, and stripping in order to develop optimum conditions to extract cadmium from aqueous chloride and bromide solutions. A 4-ppm cadmium solution can be extracted essentially quantitatively with an equal volume of 5% Alamine 336-xylene solution in 15 sec. Aqueous to organic ratios up to 20 to 1 can be utilized without loss of extraction efficiency. More than 98% of the extracted cadmium can be stripped from the nonaqueous layer with a series of aqueous strippants including 0.1 M EDTA, 1 M NaOH, and 2.5 M ammonia.
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