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This work presents theoretical and experimental results on the speciation of the Fe(II)–Fe(III)–H 2 SO 4 –H 2 O system in concentrated solutions (up to 2.2 m H 2 SO 4 and 1.3 m Fe). The aim was to study the chemical equilibria of iron at 25 and 50 °C in synthetic aqueous sulphuric acid solutions that contain dissolved ferric and ferrous ion species. Raman spectroscopy,...
The accuracy of published selenium thermodynamic data was evaluated to obtain a reliable basis for modelling Se migration behaviour in contaminated areas. The Modified Bromley's Methodology was used to correct equilibrium constant to the standard state (zero ionic strength, 25 o C and 1 bar pressure). Since redox reactions control the migration of selenium, equilibria between the various Se...
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