Application of Adsorbents for Water Pollution Control

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Among various water and wastewater treatment technologies, the adsorption process is considered better because of lower cost, simple design and easy operation. Activated carbon (a universal ...
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Equilibrium and Kinetic Modeling of Adsorption at Solid/Solution Interfaces

Pp. 32-80 (49)

Wojciech Plazinski and Anita Plazinska

Abstract

This chapter aims at presenting the most common models describing the adsorption at solid/solution interfaces. Considerations are limited to the batch-type adsorption systems. The presented models are divided into two groups: models related to the equilibrium state and those describing the time-evolution of the adsorption system ('kinetic models'). A special emphasis is put on the relation between the physical models and the empirical and/or semi-empirical mathematical expressions. The issue of interpretation of the experimental data is also briefly discussed in the context of various models.

Keywords:

Equilibrium modeling, Kinetics, Kinetic modeling, Adsorption, Interface, Langmuir model, Freundlich model, Langmuir-freundlich isotherm, Dubinin-radushkevich isotherm, Thermodynamic parameters, Multicomponent Adsorption, Multi-site-occupancy Adsorption, Intraparticle-pore-diffusion model, Intraparticle-surface-diffusion model.

Affiliation:

Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Cracow, Poland