Figure 6. Model for kinetics adsorption of MG on HNTs: a) Pseudo-first order (pH = 6.0 and Co= 200 ppm); b) Elovich (pH = 6.0 and Co = 200 ppm); c) Intra-particle (pH = 6.0 and Co = 200 ppm), and d) Pseudo-second order (pH = 6.0 and T = 297.15 K).

From

Adsorption Studies of Aqueous Solutions of Methyl Green for Halloysite Nanotubes: Kinetics, Isotherms, and Thermodynamic Parameters

Y. M. Vargas-Rodríguez, A. Obaya, J. E. García-Petronilo, G. I. Vargas-Rodríguez, A. Gómez-Cortés, G. Tavizón, J. A. Chávez-Carvayar

American Journal of Nanomaterials. 2021, 9(1), 1-11 doi:10.12691/ajn-9-1-1