Fig. 5. Experimentally measured m(Pu)tot in equilibrium with Pu(OH)3(am) at [EDTA]tot = 1 mM, I = 0.1 M NaCl (except 3.5 M CaCl2 and simulated WIPP brine) with 1 mM CaCl2 (green triangles), 20 mM CaCl2 (red squares), 3.5 M CaCl2 (orange triangles), or simulated WIPP brine (gray diamonds). Solid data symbols represent experiments containing dithionite (DT) while open data symbols represent experiments containing Sn(ii). Solid, dotted, and dashed lines correspond to the thermodynamically calculated solubility of Pu(OH)3(am) in the presence of EDTA with different calcium concentrations.21,93 Gray dashed lines represent the ICP-MS detection limits for the experimental analyses and all error bars are contained within data symbols.
