Fig. 3From: Effect of Ni2+, Zn2+, and Co2+ on green rust transformation to magnetiteSorption of metal cations during GR transformation to magnetite. GR suspensions were pre-equilibrated with either Ni2+, Zn,2+, or Co2+ for 2 h and then transferred to a 85 °C water bath. Solid symbols represent the fraction of dissolved metal remaining in solution during mineral transformation at 85 °C. Open symbols represent control experiments conducted at room temperature. Experiments were carried out with the metal cations A nickel, B zinc, and C cobaltBack to article page