Sorption of fission product radionuclides, 137Cs and 90Sr, by Savannah River Site sediments impregnated with colloidal silica
-
N. Hakem
Summary
Permeation grouting with colloidal silica gel is a potentially effective means for creating hydraulic barriers to prevent the advective migration of radioactive contaminants in shallow permeable sediments. However, the effectiveness of silica gel grouted barriers in controlling transport of fission product radionuclides through sorption and diffusion is unknown. To resolve this question, static-batch sorption measurements with Cs+ and Sr2+ were conducted at ambient temperature (23 °C) and for times up to 96 days on silica gel and on two kaolinitic sediments from the Savannah River Site in South Carolina. Sorption experiments on the latter were conducted both in the presence and in the absence of silica gel. Cesium and strontium concentrations were varied between 10-3 to 10-8 M (mol/L) and 10-4 to 10-8 M, respectively. The pH values after one day varied for each experiment and ranged from 3.6 to 6.6. The pH of the solutions were, however, buffered by the sediments and/or silica gel, and changed little over the duration of the experiments. The fraction of both cesium and strontium retained on the solids increased with decreasing radioelement concentration. The sorption data were fitted to the Freundlich isotherm model.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
Articles in the same Issue
- On-line anion exchange of rutherfordium in HF/HNO3 and HF solutions
- The oxidation of uranium(IV) ions by nitrous acid in 30% tri-butyl phosphate
- Anion-exchange behavior of Mo and W as homologs of Sg (element 106) in HCl and HNO3 as well as in mixed HCl-HF and HNO3-HF solutions
- Crystal structures of Np(VI) and Pu(VI) phthalates, [NpO2{(OOC)2C6H4}H2O]·1/3H2O and [PuO2{(OOC)2C6H4}H2O]·H2O
- TRLIFS study of Eu(III) spectroscopic properties to obtain structural and thermodynamic informations on lanthanide-malonamide complexes in the Eu(III)/NaNO3/TetraEthylMalonAmide system
- Sorption of fission product radionuclides, 137Cs and 90Sr, by Savannah River Site sediments impregnated with colloidal silica
- Removal of silver and antimony radionuclides from low-level liquid radioactive waste of a research reactor through different scavenging precipitations
- Determination of trace element concentration in infant head hair of Rawalpindi/Islamabad area using INAA technique
- Fluorescence spectroscopy on protactinium(IV) in aqueous solution
Articles in the same Issue
- On-line anion exchange of rutherfordium in HF/HNO3 and HF solutions
- The oxidation of uranium(IV) ions by nitrous acid in 30% tri-butyl phosphate
- Anion-exchange behavior of Mo and W as homologs of Sg (element 106) in HCl and HNO3 as well as in mixed HCl-HF and HNO3-HF solutions
- Crystal structures of Np(VI) and Pu(VI) phthalates, [NpO2{(OOC)2C6H4}H2O]·1/3H2O and [PuO2{(OOC)2C6H4}H2O]·H2O
- TRLIFS study of Eu(III) spectroscopic properties to obtain structural and thermodynamic informations on lanthanide-malonamide complexes in the Eu(III)/NaNO3/TetraEthylMalonAmide system
- Sorption of fission product radionuclides, 137Cs and 90Sr, by Savannah River Site sediments impregnated with colloidal silica
- Removal of silver and antimony radionuclides from low-level liquid radioactive waste of a research reactor through different scavenging precipitations
- Determination of trace element concentration in infant head hair of Rawalpindi/Islamabad area using INAA technique
- Fluorescence spectroscopy on protactinium(IV) in aqueous solution
