Reports

Composition of Aqueous Solutions in Equilibrium with Sulfides and Oxides of Iron at 350°C

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Science  22 Nov 1968:
Vol. 162, Issue 3856, pp. 895-896
DOI: 10.1126/science.162.3856.895

Abstract

Solutions of potassium chloride (pH-buffered and 1-molal) equilibrated at 350°C with pyrrhotite, pyrite, and magnetite contained approximately 1 millimole of reduced sulfur and less than 0.1 millimole of oxidized sulfur per kilogram. Similar solutions equilibrated with pyrite, magnetite, and hematite contained approximately 1 millimole of reduced sulfur, but 3 to 6 millimoles of oxidized sulfur per kilogram. Both types of solutions contained less than 0.1 millimole of iron per kilogram at pH ≥ 6 and approximately 100 millimoles per kilogram at pH 2.