Fig. 4From: The synergistic effect of calcium on organic carbon sequestration to ferrihydriteThe effect of calcium concentration on DOM sorption to 2-line ferrihydrite: sorption of DOM to 2-line ferrihydrite at 4.7 and 12.5 initial C/Fe molar ratios with increasing calcium concentration (up to 60 mM Ca) at pH 6.25 ± 0.10Back to article page