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

Figure 6

Time effect onto (a) PNS and (b) FNS composites of Pb(II) ions and Cr(VI) sorption. Experimental conditions: volume of solution (40 mL), concentration (100 ppm), adsorbent dosage (0.1 g), temperature of the system (298 K), agitation rate (200 rpm), and pH of solutions during Pb(II) ions and Cr(VI) sorption (5).

(a)

(b)