Citation:
SONG Lian-Qing, BAI Hai-Xin, LI Quan-Min. Separation of Lead by Ammonium Sulfate-Potassium Iodide-Ethyl Violet Floatation System[J]. Chinese Journal of Applied Chemistry,
;2003, 20(3): 258-261.
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The Pb(Ⅱ) ions have been separated by a flotation system consisted of ammonium sulfate, potassium iodide and ethyl vielot(EV). The results show that ternary ion-association precipitates (PbI3-)·(EV+) and (PbI42-)·(EV+)2 are formed. In the presence of 0.1 g/mL (NH4)2SO4, the precipitates floated on the surface of water phase can be easily separated by water. Thus Pb(Ⅱ) can be completely separated from Zn(Ⅱ), Mn(Ⅱ), Fe(Ⅲ), Co(Ⅱ), Al(Ⅲ) and Ni(Ⅱ) in aqueous solution of pH=1.0~4.0.
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Keywords:
- lead(Ⅱ),
- potassium iodide,
- ethyl violet,
- floatation
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