Simple separation method of Zn(II) and Cd(II) from brine solution of zinc plant residue and synthetic chloride media using solvent extraction

doi:10.1016/j.cjche.2019.12.003

Abstract

Abstract: In this work, the possibility of separation of Zn²⁺ and Cd²⁺ metal ions from chloride (brine) solutions was examined. For this purpose, simple solvent extraction (SX) experiments by di-2-ethylhexyl phosphoric acid (D2EHPA) in kerosene as a diluent was performed on synthetic and industrial chloride solution obtained from brine leaching of zinc filter cakes (by-product of zinc hydrometallurgical processing). The optimal conditions for separation were determined. The zinc extraction efficiency was 99% with negligible co-extraction of cadmium. Therefore, a high ΔpH_0.5 value for Zn(Ⅱ) and Cd(Ⅱ) was achieved. FT-IR and slope analysis indicated that ZnClA·3HA and CdClA·3HA species were probably extracted.

Key words: Solvent extraction, Brine media, Leaching filter cakes, Zinc, Cadmium

摘要： In this work, the possibility of separation of Zn²⁺ and Cd²⁺ metal ions from chloride (brine) solutions was examined. For this purpose, simple solvent extraction (SX) experiments by di-2-ethylhexyl phosphoric acid (D2EHPA) in kerosene as a diluent was performed on synthetic and industrial chloride solution obtained from brine leaching of zinc filter cakes (by-product of zinc hydrometallurgical processing). The optimal conditions for separation were determined. The zinc extraction efficiency was 99% with negligible co-extraction of cadmium. Therefore, a high ΔpH_0.5 value for Zn(Ⅱ) and Cd(Ⅱ) was achieved. FT-IR and slope analysis indicated that ZnClA·3HA and CdClA·3HA species were probably extracted.

关键词: Solvent extraction, Brine media, Leaching filter cakes, Zinc, Cadmium

Ali Asghar Balesini Aghdam, Hossein Yoozbashizadeh, Javad Moghaddam. Simple separation method of Zn(II) and Cd(II) from brine solution of zinc plant residue and synthetic chloride media using solvent extraction[J]. Chinese Journal of Chemical Engineering, 2020, 28(4): 1055-1061.

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