Fig. 2
From: Investigation of Cd(II) sorption by mackinawite (FeS) under anoxic conditions
Liberated Fe(II) concentration ([Fe(II)]lib) versus sorbed M(II) concentration ([M(II)]sorb) at pH 5.5–6.0 (a) and sorbed M(II) concentration ([M(II)]sorb) versus initial M(II) concentration ([M(II)]0) in 10 g/L FeS batches at pH 5.5–6.0 (b). In part a, error bars indicate one standard error. In part b, solid and dashed lines represent linear and Langmuir-like fits, respectively. Hg(II) sorption data are from Jeong et al. (2007)