Figure 3

(a) The stability states of different uranyl entities, the green shades indicate the species and the brown represents the mineral and (b) Vandyl species, the lighter and the darker shades indicate the fields of V⁴⁺ and V⁵⁺ complexes, in the Eh–pH plots. Variation of the (c) molar concentration of uranyl carbonates species (d) Uranyl sulfate. species. (e) Uranyl oxide, with U concentration in groundwater. The species concentrations were derived from the PHREEQCI. (f) The relationship of the saturation index of major uranium minerals with Uranium concentration in groundwater.