Figure 7From: Pyrite surface interaction with selected organic aqueous species under anoxic conditionsChange of Ī¶-potential with the addition of 0.1 mM adenine to a pyrite suspension, in the absence of iron (er-50) and in the presence of 0.5 mM Fe2+ (er-51). Note that er-51 was conducted with a 5-fold excess of iron compared to adenine (see Table 1). Interaction of purine with pyrite (a) in the absence of Fe2+ (er-34) and in the presence of 0.5 mM Fe2+ (er-41).Back to article page