Abstract
Field measurements of redox potential (Eh) and pH have been made on iron-rich (up to 35 p.p.m.) ground water of southern Maryland, and iron concentrations have been determined by laboratory analysis. The data obtained can be interpreted in terms of equilibrium being obtained between the ground waters and ferric minerals intermediate in properties between freshly precipitated ferric hydroxide and hematite. Apparently significant measurements of Eh and pH can be made, and thus two quasi-independent controls on iron concentrations and well-casing corrosion can be separated.
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