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

Figure 3

pH effect Onto (a) PNS and (b) FNS composites for Pb(II) ions and Cr(VI) sorption. Experimental conditions: volume of solution (40 mL), time (60 min), adsorbent dosage (0.1 g), temperature (298 K), agitation rate (200 rpm), and concentration (100 ppm).

(a)

(b)