Table 5 Stability constants of MZ+-phenylglycine complexes according to the reaction scheme I and scheme II
From: Thermodynamic parameters of phenylglycine interaction with UO22+, La3+ and Zr4+
Metal ion | μ | log K110 (Scheme I) | log K111 (Scheme II) | ||||
|---|---|---|---|---|---|---|---|
25 °C | 35 °C | 45 °C | 25 °C | 35 °C | 45 °C | ||
UO22+ | 0.05 | 7.13 | 7.52 | 7.75 | − 2.03 | − 1.76 | − 1.52 |
0.10 | 7.23 | 7.48 | 7.71 | − 2.06 | − 1.74 | − 1.50 | |
0.15 | 7.22 | 7.31 | 7.70 | − 2.01 | − 1.84 | − 1.45 | |
La3+ | 0.05 | 3.44 | 4.28 | 5.00 | − 5.94 | − 5.00 | − 4.27 |
0.10 | 2.92 | 3.94 | 4.70 | − 6.37 | − 5.27 | − 4.51 | |
0.15 | 2.47 | 3.48 | 4.37 | − 6.76 | − 5.66 | − 4.78 | |
Zr4+ | 0.05 | 10.14 | 9.95 | 9.77 | 0.76 | 0.67 | 0.51 |
0.10 | 9.67 | 9.75 | 9.73 | 0.38 | 0.43 | 0.52 | |
0.15 | 9.74 | 9.68 | 9.62 | − 0.09 | − 0.06 | 0.48 | |