Adsorption kinetic modeling using pseudo-first order and pseudo-second order rate laws: A review

Emmanuel D. Revellame; Dhan Lord Fortela; Wayne Sharp; Rafael Hernandez; Mark E. Zappi

Cleaner Engineering and Technology (Dec 2020)

Adsorption kinetic modeling using pseudo-first order and pseudo-second order rate laws: A review

Emmanuel D. Revellame,
Dhan Lord Fortela,
Wayne Sharp,
Rafael Hernandez,
Mark E. Zappi

Affiliations

Emmanuel D. Revellame: Department of Industrial Technology, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA; Energy Institute of Louisiana, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA; Corresponding author. Department of Industrial Technology, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA.
Dhan Lord Fortela: Energy Institute of Louisiana, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA; Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA
Wayne Sharp: Energy Institute of Louisiana, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA; Department of Civil Engineering, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA
Rafael Hernandez: Energy Institute of Louisiana, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA; Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA
Mark E. Zappi: Energy Institute of Louisiana, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA; Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA

Journal volume & issue: Vol. 1
p. 100032

Abstract

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Adsorption for water and wastewater treatment has been the subject of many research in the scientific community, focusing mainly on either equilibrium or kinetic studies. Adsorption kinetics are commonly modeled using pseudo-first and pseudo-second order rate laws. Analyses of published works in the past two decades indicated that the pseudo-second order is considered to be the superior model as it can represent many adsorption systems. However, critical assessment of modeling techniques and practices suggests that its superiority could be a consequence of currently acceptable modeling norms which tend to favor the pseudo-second order model. The partiality was due to several modeling pitfalls that are often neglected. In addition, commonly used model validation tools are often used haphazardly and redundantly. As such, they cannot sufficiently provide any kind of certainty on the validity of a model. To eliminate modeling biasness, a new validation method was proposed and was then employed to re-examine previously published adsorption kinetic data.

Published in Cleaner Engineering and Technology

ISSN: 2666-7908 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Mechanical engineering and machinery: Renewable energy sources; Technology: Engineering (General). Civil engineering (General): Environmental engineering
Website: https://www.journals.elsevier.com/cleaner-engineering-and-technology/

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