Growth of Photosynthetic Biofilms and Fe, Pb, Cu, and Zn Speciation in Unsaturated Columns with Calcareous Mine Tailings from Arid Zones

Figure 6

Absolute data for the concentration (mg⋅kg⁻¹) of the extracted Pb (a), Fe (b), Cu (c), and Zn (d) in the six strata of the selected profile from Pile 2 before the assay (𝑡₀) and after the wet (𝑡_𝑤) and dry (𝑡_𝑑) seasons. Data: average, 𝑛=3.

(a)

(b)

(c)

(d)