Abstract
ABSTRACT Iron cyanide solids are complex coordination compounds that are produced and used in various commercial products and processes as well as clinical products. These solids are also present in spent potlining wastes associated with aluminum production sites and in areas of former manufactured gas plant (MGP) facilities as a result of disposal of cyanide-bearing materials in soils containing iron. In such cases, the concentration of cyanide in groundwater is governed by dissolution of the iron cyanide solids under various environmental conditions. Understanding of the precipitation and dissolution chemistry of iron cyanide solids is still in a nascent state, however. In this work, the equilibrium solubility behavior of iron cyanide solids was studied as a function of pH, pE, and other solution conditions, including those conducive to coprecipitation of iron cyanide solids and hydrous ferric oxide. Equilibrium solubility products were determined for reagent-grade Prussian Blue, and for synthesized Pru...
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