Fig. 6From: Guar gum-grafted poly(acrylonitrile)-templated silica xerogel: nanoengineered material for lead ion removalAdsorption isotherm. Langmuir adsorption isotherm at a 30 °C and b 15 °C. Freundlich adsorption isotherm at c 30 °C and d 15 °C. Temkin adsorption isotherm at e 30 °C and f 15 °CBack to article page