Nickel and Cobalt Recovery from Alkaline Glycine Solutions by Sulfide Precipitation

Abstract

The study examines the viability of recovering nickel and cobalt from alkaline glycine leachate using mixed sulfide precipitation (MSP). It was found that MSP could achieve high recovery rates of nickel (over 95%) and cobalt (over 99%), although challenges remain with impurities co-precipitation and particle size. The [HS-]:[Metals] supersaturation, temperature, and dissolved oxygen were key factors influencing recovery and particle size. The results indicate that MSP is a viable method for recovering metal glycinates.