Table 2.
Results of spectral deconvolutions of 14 UV–Vis using single component spectra of UO2 2+ and UO2CH3COO+
| pH | lg [CH3COO−]free | [U(VI)]/mol dm−3 | [U(VI)]calc/mol dm−3 | ∆/% | [UO2 2+]/mol dm−3 | [UO2CH3COO+]/mol dm−3 | lg R |
|---|---|---|---|---|---|---|---|
| 1.9 | −3.629 | 2.42 × 10−3 | 2.40 × 10−3 | −0.8 | 2.16 × 10−3 | 2.39 × 10−4 | −0.96 |
| 2.24 | −3.656 | 2.48 × 10−3 | 2.45 × 10−3 | −1.2 | 2.19 × 10−3 | 2.58 × 10−4 | −0.93 |
| 2.42 | −3.090 | 2.42 × 10−3 | 2.42 × 10−3 | 0 | 1.73 × 10−3 | 6.90 × 10−4 | −0.397 |
| 2.52 | −3.979 | 2.43 × 10−3 | 2.44 × 10−3 | 0.4 | 2.29 × 10−3 | 1.46 × 10−4 | −1.20 |
| 2.54 | −4.127 | 1.013 × 10−3 | 1.01 × 10−2 | −0.3 | 9.49 × 10−3 | 6.00 × 10−4 | −1.20 |
| 2.56 | −4.119 | 1.04 × 10−3 | 9.61 × 10−4 | −8 | 9.29 × 10−4 | 3.25 × 10−5 | −1.46 |
| 2.65 | −3.006 | 2.44 × 10−3 | 2.45 × 10−3 | 0.4 | 1.59 × 10−3 | 8.66 × 10−3 | −0.26 |
| 2.73 | −2.759 | 4.76 × 10−3 | 4.97 × 10−3 | 4.2 | 1.85 × 10−3 | 3.13 × 10−3 | +0.23 |
| 2.8 | −3.582 | 2.43 × 10−3 | 2.50 × 10−3 | 2.8 | 2.13 × 10−3 | 3.75 × 10−4 | −0.75 |
| 2.88 | −2.996 | 2.48 × 10−3 | 2.42 × 10−3 | −2.4 | 1.55 × 10−3 | 8.68 × 10−4 | −2.53 |
| 2.89 | −3.492 | 4.94 × 10−3 | 5.03 × 10−3 | 1.7 | 4.01 × 10−3 | 1.01 × 10−3 | −0.60 |
| 2.96 | −2.709 | 9.77 × 10−3 | 1.02 × 10−2 | 4.2 | 3.35 × 10−3 | 6.86 × 10−3 | +0.31 |
| 3.24 | −3.952 | 2.61 × 10−3 | 2.61 × 10−3 | 0 | 2.28 × 10−3 | 3.30 × 10−4 | −0.84 |
| 3.43 | −2.562 | 4.88 × 10−3 | 5.02 × 10−3 | 2.8 | 9.10 × 10−4 | 4.11 × 10−3 | +0.66 |
[A], molar concentrations of species A
∆, percentual difference between theoretical and calculated U(VI) total concentration
R, concentration ratio of UO2CH3COO+ and UO2 2+