Magnetite-Functionalized Horse Dung Humic Acid (HDHA) for the Uptake of Toxic Lead(II) from Artificial Wastewater

Figure 4

(a) Optimum pH of Pb(II) adsorption onto MHDHA; (b) % adsorption of Pb(II) onto MHDHA as a function of pH and ionic strength.

(a)

(b)