CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Sorption of Pu(VI) onto TiO2

Mattias Olsson (Institutionen för material- och ytkemi, Kärnkemi) ; Anna-Maria Jakobsson (Institutionen för material- och ytkemi, Kärnkemi) ; Yngve Albinsson (Institutionen för material- och ytkemi, Kärnkemi)
Journal of Colloid and Interface Science (0021-9797). Vol. 266 (2003), 2, p. 269-275.
[Artikel, refereegranskad vetenskaplig]

The sorption of Pu(VI) onto TiO2 was studied as a function of pH (2–10) and Pu concentration (10−8–10−4 M) under an N2 atmosphere, in 0.016 and 0.1 M NaClO4. A batch-wise method was used, in which pH was measured in separate experimental containers after removal of a sample to determine the amount of Pu that had been sorbed. As Pu is radioactive, it was used as a tracer and measured by liquid scintillation counting. No ionic strength dependence was discerned, which was taken as an indication of inner sphere complex formation. In the interval of pH 2–7 the system could be described by the formation of two positively charged surface complexes using a 1-pK Stern model. Sorption of the plutonyl ion (PuO22+) and the first hydrolysis species (PuO2(OH)+) was estimated using FITEQL to logK1=6.9 and logK2=1.4, respectively.

Nyckelord: sorption, surface complexation, plutonium, actinide, TiO2, FITEQL

Denna post skapades 2006-08-29.
CPL Pubid: 1545


Institutioner (Chalmers)

Institutionen för material- och ytkemi, Kärnkemi (2002-2004)


Geovetenskap och miljövetenskap

Chalmers infrastruktur

Relaterade publikationer

Denna publikation ingår i:

Surface Complexation Studies in An (Th, U(IV), Pu(VI)) Systems