Fig. 5

Pseudo-first-order kinetics (a), pseudo-second-order kinetics (b), Elovich kinetics (c) and intraparticle diffusion model (d) for Pb(II) removal by REEs/Cs (n = 3).
Pseudo-first-order kinetics (a), pseudo-second-order kinetics (b), Elovich kinetics (c) and intraparticle diffusion model (d) for Pb(II) removal by REEs/Cs (n = 3).