RES3T-Rossendorf expert system for surface and sorption thermodynamics

Actinides sorption onto hematite: experimental data, surface complexation modeling and linear free energy relationship

“…log sorb = 2.46 ≡FeOH + Cu 2+ + ≡FeOCu + + H + , (8) log sorb = −0.65 ≡FeOH + Ga 3+ + ≡FeOGa 2+ + H + , (9) log sorb = 11.28…”

“…Several international and national attempts have been made to develop a sorption database that would include surface complexation modeling data for single and multicomponent mineral mixtures [8]. OECD have launched "NEA Sorption Project" [6,9,10] aimed to study sorption behavior of various radionuclides and to obtain surface complexation data.…”

Uranyl sorption onto gibbsite studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS)

“…Then generalizations could be drawn and the interpretation of sorption experiments on more complex minerals becomes easier. In addition the obtained SCM parameters will broaden the data coverage of the mineral-specific sorption database RES 3 T [18]. The contaminant selected for our studies was uranium(VI) (the uranyl cation UO 2+ 2 ) which is highly relevant because of its chemical toxicity and radioactivity combined with its occurrence in rock piles or mine tailings, in contaminated areas, and as part of the inventory of nuclear waste disposals.…”

The element-release mechanisms of two pyrite-bearing siliciclastic rocks from the North German Basin at temperatures up to 90 °C under oxic and anoxic conditions

“…It was possible to fit the reactive surface of pyrite directly to the solute Fe concentration (Fig. 7), which resulted in plausible (Brendler et al 2003). The observed retardation and temperature dependences of oxic Fe release from the Sinemurian siltstone can be explained with amorphous coatings blocking the surfaces of the pyrite crystals, which Müller et al (2017) identified using SEM-EDX.…”

“…Grain density is 2650 kg/m −3 for quartz and 2600 kg/m −3 for potassium feldspar (Deer et al 1992). The average grain sizes and grain shapes of the other solid phases contained in the rock were unknown, and therefore, the median values of the specific surface values collected from numerous literature sources in the RES 3 T database (Brendler et al 2003) were used as a reference. The specific surface values for each solid phase were multiplied with a factor of 3 to match the measured BET surface values of 0.5 m 2 /g for sample I, and 13.2 m 2 /g for sample II, as reported by Müller and Regenspurg (2014).…”