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

Figure 6

(a) The removal uptake of Pb(II) as the function of initial concentration () and the linear plots of (b) Langmuir, (c) Freundlich, (d) Temkin, and (e) D-R isotherm models of Pb(II) sorption onto MHDHA.

(a)

(b)

(c)

(d)

(e)