Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater

Figure 4

Speciation diagrams of (a) Cr(VI) and (b) Pb(II) ions onto PNS and FNS composites at a concentration of 100 mg/L at room temperature.

(a)

(b)