Skip to main content

Advertisement

Table 1 Langmuir and Freundlich adsorption isotherm constants for the adsorption of Pb2+ ions on to GAC, HAP/GAC and HAP/TE/GAC

From: Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution

Material Langmuir adsorption isotherm constants Freundlich adsorption isotherm constants
qm (mg/g) K (L/mg) R2 Kf n R2
HAP/GAC 36.9 (± 0.8) 3.1 × 10−3 (± 1.1 × 10−4) 0.9989 1.1 (± 0.2) 2.0 (± 0.1) 0.9939
GAC 31.1 (± 2.3) 3.6 × 10−3 (± 4.6 × 10−4) 0.9891 1.4 (± 0.2) 2.3 (± 0.2) 0.9905
HAP/TE/GAC 29.4 (± 7.2) 3.1 × 10−3 (± 1.2 × 10−3) 0.8931 1.1 (± 0.7) 2.2 (± 0.6) 0.8818