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

摘要

In this work,the possibility of separation of Zn^2+and Cd^2+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 highΔpH0.5 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.