Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided

Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided

Numerical simulation of sorption dynamics showed that the use of data recorded at (or very close to) equilibrium in the search for the kinetic equation that best describes the process frequently leads to incorrect conclusions. Notably, it has been demonstrated that the fit of the adsorption data at...

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Main Authors: Silvana Canzano, Pasquale Iovino, Vincenzo Leone, Stefano Salvestrini, Sante Capasso
Format: Article
Language:English
Published: Hindawi - SAGE Publishing 2012-03-01
Series:Adsorption Science & Technology
Online Access:https://doi.org/10.1260/0263-6174.30.3.217
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spelling doaj-29d926fbc595417aac22e01887a200192021-04-02T11:38:57ZengHindawi - SAGE PublishingAdsorption Science & Technology0263-61742048-40382012-03-013010.1260/0263-6174.30.3.217Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be AvoidedSilvana CanzanoPasquale IovinoVincenzo LeoneStefano SalvestriniSante CapassoNumerical simulation of sorption dynamics showed that the use of data recorded at (or very close to) equilibrium in the search for the kinetic equation that best describes the process frequently leads to incorrect conclusions. Notably, it has been demonstrated that the fit of the adsorption data at equilibrium (t/q t versus t) is a straight line irrespective of the sorption kinetics. In order to distinguish pseudo-first-order from pseudo-second-order sorption kinetics, the data near the equilibrium should be omitted from the least-squares fit and the result confirmed by a different method. A straightforward method based on Δ(q t /q e )/Δt versus 1 – q t /q e and versus (1 – q t /q e ) 2 plots is suggested. Some recent papers reporting incorrect sorption kinetic analyses are discussed.https://doi.org/10.1260/0263-6174.30.3.217
collection DOAJ
language English
format Article
sources DOAJ
author Silvana Canzano
Pasquale Iovino
Vincenzo Leone
Stefano Salvestrini
Sante Capasso
spellingShingle Silvana Canzano
Pasquale Iovino
Vincenzo Leone
Stefano Salvestrini
Sante Capasso
Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
Adsorption Science & Technology
author_facet Silvana Canzano
Pasquale Iovino
Vincenzo Leone
Stefano Salvestrini
Sante Capasso
author_sort Silvana Canzano
title Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
title_short Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
title_full Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
title_fullStr Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
title_full_unstemmed Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
title_sort use and misuse of sorption kinetic data: a common mistake that should be avoided
publisher Hindawi - SAGE Publishing
series Adsorption Science & Technology
issn 0263-6174
2048-4038
publishDate 2012-03-01
description Numerical simulation of sorption dynamics showed that the use of data recorded at (or very close to) equilibrium in the search for the kinetic equation that best describes the process frequently leads to incorrect conclusions. Notably, it has been demonstrated that the fit of the adsorption data at equilibrium (t/q t versus t) is a straight line irrespective of the sorption kinetics. In order to distinguish pseudo-first-order from pseudo-second-order sorption kinetics, the data near the equilibrium should be omitted from the least-squares fit and the result confirmed by a different method. A straightforward method based on Δ(q t /q e )/Δt versus 1 – q t /q e and versus (1 – q t /q e ) 2 plots is suggested. Some recent papers reporting incorrect sorption kinetic analyses are discussed.
url https://doi.org/10.1260/0263-6174.30.3.217
work_keys_str_mv AT silvanacanzano useandmisuseofsorptionkineticdataacommonmistakethatshouldbeavoided
AT pasqualeiovino useandmisuseofsorptionkineticdataacommonmistakethatshouldbeavoided
AT vincenzoleone useandmisuseofsorptionkineticdataacommonmistakethatshouldbeavoided
AT stefanosalvestrini useandmisuseofsorptionkineticdataacommonmistakethatshouldbeavoided
AT santecapasso useandmisuseofsorptionkineticdataacommonmistakethatshouldbeavoided
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