Figure 3From: Influence of soil minerals on chromium(VI) reduction by sulfide under anoxic conditionsThe presence of externally added ferrous iron and sorbed iron on illite (3.0 g/L) increases rates of Cr(VI) reduction by sulfide as tested at pH8.27. When phenanthroline, a strong Fe(II)-complexation agent, is added, the effect of illite with sorbed iron on the Cr(VI) reduction reaction was neutralized.Back to article page