Fig. 7From: Guar gum-grafted poly(acrylonitrile)-templated silica xerogel: nanoengineered material for lead ion removalAdsorption kinetics of heavy metals adsorption modeled at 500, 700, and 900 mgL−1 Pb2+. a Lagergren first. b Pseudo-second order. c Second-order model. d Regeneration study of Pb2+ adsorption by templated silica xerogel (H900)Back to article page