The Absorption and Distribution of Heavy Metals of Dominant Plant for Ecological Restoration of Stone Coal Mine

Figure 3

The concentrations of heavy metal of both stone coal and substrate material with recovered time. The s.coal and init. represented stone coal and substrate material, respectively. The error bar was the standard error.

(a) Pb

(b) Cd

(c) Cr

(d) As

(e) Cu

(f) Zn

(g) Sb

(h) Ni

(i) Mn

(j) Zn