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The Halsey isotherm for water contaminant adsorption is fake

We present a critique of the Halsey isotherm model (also known as Frenkel–Halsey–Hill), which is used by many researchers to interpret water contaminant adsorption data. We first convert the original Halsey isotherm for gasphase adsorption to a form appropriate for liquid-phase adsorption. We call...

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Main Authors: Chu, Khim Hoong, Bashiri, Hadis, Hashim, Mohd Ali, Abd Shukor, Mohd Yunus, Bollinger, Jean-Claude
Format: Article
Published: Elsevier 2023
Online Access:http://psasir.upm.edu.my/id/eprint/109270/
https://linkinghub.elsevier.com/retrieve/pii/S1383586623004082
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spelling my.upm.eprints.1092702024-08-19T03:04:47Z http://psasir.upm.edu.my/id/eprint/109270/ The Halsey isotherm for water contaminant adsorption is fake Chu, Khim Hoong Bashiri, Hadis Hashim, Mohd Ali Abd Shukor, Mohd Yunus Bollinger, Jean-Claude We present a critique of the Halsey isotherm model (also known as Frenkel–Halsey–Hill), which is used by many researchers to interpret water contaminant adsorption data. We first convert the original Halsey isotherm for gasphase adsorption to a form appropriate for liquid-phase adsorption. We call this version the “genuine Halsey isotherm.” We then show that the Halsey isotherm currently used in water contaminant adsorption research bears only a partial resemblance to the genuine Halsey isotherm. As such, we label the former the “fake Halsey isotherm.” We go on to prove that the fake Halsey isotherm is mathematically equivalent to the Freundlich isotherm. Consequently, the modeling results obtained by the fake Halsey isotherm reported in numerous previously published studies have been mostly misleading. Many such reports can be found across a broad spectrum of major journals. Finally, we highlight the data-fitting attributes of the genuine Halsey isotherm. It is shown to be capable of describing adsorption isotherms having types I, II, and III curve shapes. Elsevier 2023-05-15 Article PeerReviewed Chu, Khim Hoong and Bashiri, Hadis and Hashim, Mohd Ali and Abd Shukor, Mohd Yunus and Bollinger, Jean-Claude (2023) The Halsey isotherm for water contaminant adsorption is fake. Separation and Purification Technology, 313. art. no. 123500. pp. 1-8. ISSN 1383-5866; ESSN: 1873-3794 https://linkinghub.elsevier.com/retrieve/pii/S1383586623004082 10.1016/j.seppur.2023.123500
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description We present a critique of the Halsey isotherm model (also known as Frenkel–Halsey–Hill), which is used by many researchers to interpret water contaminant adsorption data. We first convert the original Halsey isotherm for gasphase adsorption to a form appropriate for liquid-phase adsorption. We call this version the “genuine Halsey isotherm.” We then show that the Halsey isotherm currently used in water contaminant adsorption research bears only a partial resemblance to the genuine Halsey isotherm. As such, we label the former the “fake Halsey isotherm.” We go on to prove that the fake Halsey isotherm is mathematically equivalent to the Freundlich isotherm. Consequently, the modeling results obtained by the fake Halsey isotherm reported in numerous previously published studies have been mostly misleading. Many such reports can be found across a broad spectrum of major journals. Finally, we highlight the data-fitting attributes of the genuine Halsey isotherm. It is shown to be capable of describing adsorption isotherms having types I, II, and III curve shapes.
format Article
author Chu, Khim Hoong
Bashiri, Hadis
Hashim, Mohd Ali
Abd Shukor, Mohd Yunus
Bollinger, Jean-Claude
spellingShingle Chu, Khim Hoong
Bashiri, Hadis
Hashim, Mohd Ali
Abd Shukor, Mohd Yunus
Bollinger, Jean-Claude
The Halsey isotherm for water contaminant adsorption is fake
author_facet Chu, Khim Hoong
Bashiri, Hadis
Hashim, Mohd Ali
Abd Shukor, Mohd Yunus
Bollinger, Jean-Claude
author_sort Chu, Khim Hoong
title The Halsey isotherm for water contaminant adsorption is fake
title_short The Halsey isotherm for water contaminant adsorption is fake
title_full The Halsey isotherm for water contaminant adsorption is fake
title_fullStr The Halsey isotherm for water contaminant adsorption is fake
title_full_unstemmed The Halsey isotherm for water contaminant adsorption is fake
title_sort halsey isotherm for water contaminant adsorption is fake
publisher Elsevier
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/109270/
https://linkinghub.elsevier.com/retrieve/pii/S1383586623004082
_version_ 1809142982505398272
score 13.211869

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