The Removal of Pertechnetate from Aqueous Solution by Synthetic Hydroxyapatite: The Role of Reduction Reagents and Organic Ligands
Abstract
:1. Introduction
2. Materials and Methods
2.1. Reagents
2.2. Characterization of Hydroxyapatite
2.3. Sorption Experiments
3. Results and Discussion
3.1. Characterization of Hydroxyapatite
3.2. Sorption Experiments
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Abbreviations
References
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m (mg) | H2O | ABS pH 4.0 | |||||||
pHi | Eh (mV) | pHe | Kd (cm3·g−1) | pHi | Eh (mV) | pHe | Kd (cm3·g−1) | ||
0 | 2.0 | 134 | 2.5 | 2 × 104 | 2.0 | 135 | 2.7 | 3 × 104 | |
OA | 10 | 1.8 | 87 | 2.9 | 3 × 102 | 1.8 | 93 | 2.9 | 3 × 102 |
30 | 1.7 | 78 | 2.4 | 4 × 101 | 1.7 | 88 | 2.4 | 4 × 101 | |
AA | 10 | 1.9 | 129 | 3.0 | 2 × 103 | 2.0 | 125 | 3.0 | 2 × 103 |
30 | 1.7 | 116 | 3.1 | 1 × 103 | 1.7 | 121 | 2.8 | 1 × 103 | |
EDTA | 10 | 1.9 | 222 | 2.4 | 4 × 103 | 1.9 | 230 | 2.6 | 3 × 103 |
30 | 1.9 | 241 | 4.2 | 6 × 101 | 1.9 | 236 | 4.1 | 3 × 101 | |
m (mg) | PBS pH 5.5 | PBS pH 8.0 | |||||||
pHi | Eh (mV) | pHe | Kd (cm3·g−1) | pHi | Eh (mV) | pHe | Kd (cm3·g−1) | ||
0 | 2.0 | 146 | 3.0 | 4 × 104 | 2.0 | 153 | 3.1 | 6 × 104 | |
OA | 10 | 1.9 | 105 | 2.8 | 4 × 102 | 1.9 | 94 | 3.0 | 4 × 102 |
30 | 1.6 | 80 | 2.5 | 4 × 101 | 1.6 | 86 | 2.6 | 6 × 101 | |
AA | 10 | 2.0 | 154 | 3.2 | 1 × 103 | 2.0 | 170 | 3.0 | 2 × 103 |
30 | 1.7 | 145 | 3.2 | 7 × 102 | 1.7 | 161 | 3.2 | 5 × 102 | |
EDTA | 10 | 1.8 | 272 | 2.6 | 5 × 102 | 1.8 | 270 | 2.8 | 7 × 102 |
30 | 1.8 | 263 | 4.1 | 8 × 101 | 1.9 | 257 | 4.0 | 5 × 101 |
m (mg) | c(Fe2+) (mol·dm−3) | H2O | ABS pH 4.0 | |||||||
pHi | Eh (mV) | pHe | Kd (cm3·g−1) | pHi | Eh (mV) | pHe | Kd (cm3·g−1) | |||
OA | 10 | 0.6 | 2.0 | 200 | 2.8 | 876 | 1.6 | 191 | 2.6 | 483 |
0.4 | 2.1 | 204 | 3.0 | 283 | 1.7 | 207 | 2.9 | 265 | ||
0.2 | 2.1 | 216 | 3.2 | 98 | 1.6 | 218 | 2.6 | 82 | ||
AA | 10 | 0.6 | 2.1 | 262 | 3.3 | 14 | 1.6 | 249 | 3.0 | 5 |
0.4 | 2.0 | 267 | 3.3 | 12 | 1.8 | 266 | 3.3 | 6 | ||
0.2 | 2.1 | 276 | 3.5 | 8 | 1.5 | 273 | 3.0 | 4 | ||
EDTA | 10 | 0.6 | 2.1 | 185 | 2.7 | 14 | 2.0 | 289 | 2.8 | 12 |
0.4 | 2.1 | 137 | 2.8 | 2 | 2.0 | 146 | 2.9 | 15 | ||
0.2 | 2.1 | 151 | 3.1 | 3 | 2.0 | 153 | 3.2 | 7 | ||
m (mg) | c(Fe2+) (mol·dm−3) | PBS pH 5.5 | PBS pH 8.0 | |||||||
pHi | Eh (mV) | pHe | Kd (cm3·g−1) | pHi | Eh (mV) | pHe | Kd (cm3·g−1) | |||
OA | 10 | 0.6 | 1.9 | 188 | 2.7 | 324 | 1.9 | 188 | 2.6 | 547 |
0.4 | 1.7 | 200 | 2.6 | 224 | 1.9 | 198 | 2.6 | 527 | ||
0.2 | 1.8 | 214 | 2.8 | 507 | 2.0 | 212 | 3.0 | 609 | ||
AA | 10 | 0.6 | 1.9 | 256 | 2.6 | 672 | 1.9 | 245 | 2.8 | 767 |
0.4 | 1.7 | 260 | 2.7 | 949 | 1.9 | 250 | 2.9 | 799 | ||
0.2 | 1.7 | 268 | 2.9 | 920 | 2.0 | 257 | 3.0 | 649 | ||
EDTA | 10 | 0.6 | 1.5 | 248 | 2.1 | 24 | 1.8 | 322 | 2.6 | 25 |
0.4 | 1.7 | 133 | 2.4 | 17 | 1.8 | 142 | 2.6 | 22 | ||
0.2 | 1.8 | 146 | 2.8 | 11 | 1.8 | 133 | 2.8 | 11 |
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Rosskopfová, O.; Viglašová, E.; Galamboš, M.; Daňo, M.; Tóthová, D. The Removal of Pertechnetate from Aqueous Solution by Synthetic Hydroxyapatite: The Role of Reduction Reagents and Organic Ligands. Int. J. Environ. Res. Public Health 2023, 20, 3227. https://doi.org/10.3390/ijerph20043227
Rosskopfová O, Viglašová E, Galamboš M, Daňo M, Tóthová D. The Removal of Pertechnetate from Aqueous Solution by Synthetic Hydroxyapatite: The Role of Reduction Reagents and Organic Ligands. International Journal of Environmental Research and Public Health. 2023; 20(4):3227. https://doi.org/10.3390/ijerph20043227
Chicago/Turabian StyleRosskopfová, Oľga, Eva Viglašová, Michal Galamboš, Martin Daňo, and Darina Tóthová. 2023. "The Removal of Pertechnetate from Aqueous Solution by Synthetic Hydroxyapatite: The Role of Reduction Reagents and Organic Ligands" International Journal of Environmental Research and Public Health 20, no. 4: 3227. https://doi.org/10.3390/ijerph20043227