Figure 8. Adsorption isotherms for methyl green dye adsorption on HNTs, at different temperatures: a) Temkin: b) Freundlich isotherms; c) Langmuir and Dubinin-Raduskevich

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