Methylparaben adsorption onto activated carbon and activated olive stones: comparative analysis of efficiency, equilibrium, kinetics and effect of graphene-based nanomaterials addition
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León Albert, Gerardo; Hidalgo, Asunción María; Martínez García, Antonio José; Guzmán, María Amelia; Miguel Hernández, BeatrizÁrea de conocimiento
Ingeniería QuímicaFecha de publicación
2023-08-10Editorial
MDPICita bibliográfica
León, G.; Hidalgo, A.M.; Martínez, A.; Guzmán, M.A.; Miguel, B. Methylparaben Adsorption onto Activated Carbon and Activated Olive Stones: Comparative Analysis of Efficiency, Equilibrium, Kinetics and Effect of Graphene-Based Nanomaterials Addition. Appl. Sci. 2023, 13, 9147. https://doi.org/10.3390/app13169147Revisión por pares
siPalabras clave
adsorptionmethylparaben
activated carbon
activated olive stones
equilibrium
kinetics
mechanism
graphene-based nanomaterials
Resumen
This paper describes a comparative study of the adsorption of methylparaben onto commercial
activated carbon and olive stones activated by calcination at 300 °C and treatment with 1 M
HCl. The influence of the initial concentration of methylparaben, adsorbent dose, stirring speed and
pH on the adsorption capacity of methylparaben on both adsorbents was studied. To find out the
isotherm model, the kinetic model and the mechanism that best describe the adsorption process on
each adsorbent, the experimental equilibrium data were analyzed using six isotherm models (Langmuir,
Freundlich, Elovich, Temkin, Jovanovic and Dubinin–Radushkevich), and the experimental
kinetic data were analyzed using four kinetic models (pseudo-first order, pseudo-second order, Elovich
and Avrami) and two mechanistic models (Weber–Morris and Boyd). For both adsorbents, the
Langmuir model best describes the adsorption equilibrium, the kinetics of the process follow a
pseudo-first-order model and boundary ...
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