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. ISSN 1383-5866, DOI https://doi.org/10.1016/j.seppur.2023.123500.
Full text not available from this repository.Abstract
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 gas-phase 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 pre-viously 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.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Frenkel-Halsey-Hill; Isotherm misuse; Sigmoid isotherm; Type I isotherm; Type II isotherm; Type III isotherm |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering > Department of Chemical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 13 Jun 2024 00:52 |
| Last Modified: | 13 Jun 2024 00:52 |
| URI: | http://eprints.um.edu.my/id/eprint/38461 |
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