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Derivation of the Freundlich Adsorption Isotherm from Kinetics

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Joseph Skopp

School of Natural Resources, University of Nebraska, Lincoln, NE 68583

J. Chem. Educ., 2009, 86 (11), p 1341

DOI: 10.1021/ed086p1341

Publication Date (Web): November 1, 2009

Section:

History, Education, and Documentation

Abstract

The Freundlich adsorption isotherm is a useful description of adsorption phenomena. It is frequently presented as an empirical equation with little theoretical basis. In fact, a variety of derivations exist. Here a new derivation is presented using the concepts of fractal reaction kinetics. This derivation provides an alternative basis for interpreting the parameters obtained using the Freundlich isotherm. The derivation is simple enough to be used in an undergraduate chemistry class. The derivation can also be extended to a fractal-like Langmuir adsorption isotherm.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Environmental Chemistry

Keywords (Feature):

Research: Science and Education

Keywords (Pedagogy):

Textbooks / Reference Books

Keywords (Subject):

Colloids

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

Water Adsorption on Clay Minerals As a Function of Relative Humidity: Application of BET and Freundlich Adsorption Models
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Langmuir2012 28 (3), 1790-1803
- Water Adsorption on Clay Minerals As a Function of Relative Humidity: Application of BET and Freundlich Adsorption Models
  Courtney D. Hatch, Jadon S. Wiese, Cameron C. Crane, Kenneth J. Harris, Hannah G. Kloss, and Jonas Baltrusaitis
  Langmuir2012 28 (3), 1790-1803
  Water adsorption on kaolinite, illite, and montmorillonite clays was studied as a function of relative humidity (RH) at room temperature (298 K) using horizontal attenuated total reflectance (HATR) Fourier transform infrared (FTIR) spectroscopy equipped ...
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Application of Cellulose-Clay Composite Biosorbent toward the Effective Adsorption and Removal of Chromium from Industrial Wastewater
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  Industrial & Engineering Chemistry Research2012 51 (1), 58-69
  Biopolymer composites are known for their utility in diverse applications. In this paper, we report an effective methodology for the detoxification of chromium using cellulose-montmorillonite composite material as the adsorbent. The interaction of ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links