Adsorption of Pb(II) from Water onto ZnO, TiO₂, and Al₂O₃: Process Study, Adsorption Behaviour, and Thermodynamics

Figure 6

Equilibrium isotherms of Pb(II) onto all adsorbents: (a) Langmuir, (b) Freundlich, (c) Temkin, and (d) Dubinin-Radushkevich.

(a)

(b)

(c)

(d)