Phosphate-Mediated Remediation of Metals and Radionuclides
Figure 2
Influence of soluble phosphate and changing pH on chemical speciation of (a) U(VI) and (b) metal mixture composed of Cd(II), Pb(II), and Zn(II), Calculated using MINEQL + v. 4.5 and the Nuclear Energy Agency’s updated thermodynamic database for uranium [106, 107] as a function of pH in synthetic groundwater (SGW). The open system model at 22°C calculated aqueous (dotted lines) and solid phases (solid lines) at equilibrium using the concentrations of ions present in SGW, μM, μM, μM, μM, μM, and atm. Chemical speciation calculations utilized SGW that consists of 2 μM FeSO4, 5 μM MnCl2, 8 μM Na2MoO4, 0.8 mM MgSO4, 7.5 mM NaNO3, 0.4 mM KCl, 7.5 mM KNO3, and 0.2 mM Ca (NO3)2 [57].
