Adsorption behaviour of pollutants: Heavy metals, radionuclides, organic pollutants, on clays and their minerals (raw, modified and treated): A review.

It remains a challenge to establish structural models of multi component oxide glass systems. In this study, we have investigated 68.3 SiO2-16.1B2O3-4.2 Al2O3-11.4 Na2O glass and melt structures by ab initio molecular dynamics (AIMD) simulations. The atomic configurations obtained from AIMD simulations were validated against 17O solid- state NMR spectrum under 24.0 T and neutron diffraction data, and excellent agreement was achieved.

The bond lengths, angles, coordination geometries were statistically analyzed for each atomic species. Here we particularly address the role of minor atomic species such as five- coordinate Si (SiV) and Al (AlV). The SiV-O bond lengths and O-SiV-O angle distribution in the glass indicated 1.718 Ǻ and three peaks at 90◦, 120◦, and 175◦, which are assigned to a coordination geometry of the trigonal bipyramidal structure. Ring statistic analysis revealed that SiV and AlV were found to preferentially contribute to the formation of small ring sizes.

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Insights from ab initio molecular dynamics simulations for a multicomponent oxide glass

Vitrification processes of simulated cesium sorbing zeolite waste

Radiological and non-radiological leaching assessment of alkali-activated materials containing ground granulated blast furnace slag and phosphogypsum.

Chemical Durability of Iron-phosphate Glass as the High Level Waste from Pyrochemical Reprocessing☆

The solubility of thorium and americium in pore water squeezed from a cement paste was investigated by a batch method from oversaturation. The cement paste was prepared by mixing ordinary Portland cement with deionised water; in some cases the deionised water contained a polycarboxylic acid–base type superplasticiser. Following solidification, pore water was squeezed from the cement paste and collected for use in the solubility experiments. The aim of these was to investigate whether there was any effect of superplasticiser on the solubility of thorium and americium in the squeezed cement pore waters. The obtained solubility values in the two squeezed pore waters (with and without superplasticiser present) were similar. Thermodynamic calculations were performed with the thermodynamic database developed by Japan Atomic Energy Agency and compared with the experimental data to verify their applicability. These results showed that the superplasticiser used in the present study after mixing with the cement paste did not have a significant effect on solubility of thorium and americium, and the thermodynamic calculations were applicable in the present system. Size distribution of colloidal species of thorium and americium was also investigated.

Thorium and americium solubilities in cement pore water containing superplasticiser compared with thermodynamic calculations

Status of Studies on HLW Glass Performance for Confirming Its Validity in Assessment

Enhancement of the methodology of repository design and post-closure performance assessment for preliminary investigation stage (3). Progress report on NUMO-JAEA collaborative research in FY2013 (Joint research)

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Thorium and americium solubilities in cement pore water containing superplasticiser compared with thermodynamic calculations

Status of Studies on HLW Glass Performance for Confirming Its Validity in Assessment

Enhancement of the methodology of repository design and post-closure performance assessment for preliminary investigation stage (3). Progress report on NUMO-JAEA collaborative research in FY2013 (Joint research)