Loading...
Please wait, while we are loading the content...
Similar Documents
Sorption of Np(V), Pu(V), and Pu(IV) on colloids of Fe(III) oxides and hydrous oxides and MnO2
| Content Provider | Semantic Scholar |
|---|---|
| Author | Khasanova, A. B. Shcherbina, Natalia S. Kalmykov, Stepan N. Teterin, Yu. A. Novikov, Alexander P. |
| Copyright Year | 2007 |
| Abstract | AbstractSorption of Np(V), Pu(V), and Pu(IV) on colloids of synthetic goethite (α-FeOOH), hematite (α-Fe2O3), maghemite (γ-Fe2O3), and amorphous MnO2 was studied over wide ranges of solution pH and ionic strength by solvent extraction and X-ray photoelectron spectroscopy (XPS). Plutonium(V) is reduced upon sorption on α-FeOOH, but not on α-Fe2O3 and γ-Fe2O3. On the MnO2 surface, Pu occurs as Pu(VI). From the pH dependences of the actinide sorption, the equilibrium constants of the reactions of Np(V)O2+ and Pu(V)O2+ with the surface hydroxy groups of the investigated colloid particles and a set of the equilibrium constants of the reactions of Pu(IV) hydroxo complexes with α-FeOOH were obtained. If no redox reactions occur on the surface of the colloid particles, these constants decrease in the order $$ K_{MnO_2 } > K_{\alpha - FeOOH} > K_{\alpha - Fe_2 O_3 } \sim K_{\gamma - Fe_2 O_3 } $$ . |
| Starting Page | 419 |
| Ending Page | 425 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1134/S1066362207040170 |
| Volume Number | 49 |
| Alternate Webpage(s) | http://www.wipp.energy.gov/library/CRA/2009_CRA/references/Others/Khasanova_et_al_2007_Sorption_of_NpV_and_PuIV_on_Colloids.pdf |
| Alternate Webpage(s) | https://doi.org/10.1134/S1066362207040170 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
