Abstract
Physical and chemical investigations of the processes of isolating arsenic from solutions of complex composition are carried out. The influence of arsenic state on the solutions, oxidant concentration, pH, and the ratio of components on the completeness of arsenic isolation from the solutions is determined. Thermodynamic laws of the processes of the interactions of arsenic oxide with metals (Na, Ca, Mg, Al, and Fe) and silicon oxides are considered. It is shown that, in a simulation system consisting of arsenic, calcium, magnesium, aluminum, iron, and silicon oxides, the complete immobilization of arsenic into stable, nonvolatile compounds is possible. The results obtained serve as the basis of the developed method of conversion and the utilization of arsenic-containing waste.
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