Abstract
A procedure for zinc flotation separation from fresh water prior to its determination by atomic absorption spectrometry (AAS) has been developed. Hexamethyleneammonium hexamethylenedithiocarbamate (HMA-HMDTC) added to the first precipitate collector of hydrated Fe(III) oxide (Fe2O3· xH2O) gives the second precipitate collector of Fe(HMDTC)3. After addition of a surfactant, the precipitate of collectors is separated from the water phase by a stream of air bubbles, dissolved by strong acid and the solution then tested by AAS. The experimental parameters (amount of collector used, pH, ionic strength, type of foaming reagent, ζ potential, induction time etc.) affecting the flotation efficiency were optimized. At a pH of 6, Zn is separated quantitatively (98.5%) by addition of 5 mg Fe(III) and 3 mL 0.1 mol/L HMA-HMDTC to the sample. Results are compared with those obtained by ammonium tetramethylenedithiocarbamate.
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Received: 21 August 1997 /Revised: 19 November 1997 / Accepted: 23 November 1997
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Pavlovska, G., Stafilov, T. & Čundeva, K. Comparison of hexamethylenedithiocarbamate and tetramethylenedithiocarbamate as flotation reagents for the concentration of zinc. Fresenius J Anal Chem 361, 213–216 (1998). https://doi.org/10.1007/s002160050865
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DOI: https://doi.org/10.1007/s002160050865