Correction to the calculation of Polanyi potential from Dubinnin-Rudushkevich equation

Xueyong Zhou

doi:10.1016/j.jhazmat.2019.121101

Correction to the calculation of Polanyi potential from Dubinnin-Rudushkevich equation

J Hazard Mater. 2020 Feb 15:384:121101. doi: 10.1016/j.jhazmat.2019.121101. Epub 2019 Aug 26.

Author

Xueyong Zhou¹

Affiliation

¹ Tianjin Engineering and Technology Research Center of Agricultural Products Processing, College of Food Science and Bioengineering, Tianjin Agricultural University, Tianjin 300384, China. Electronic address: zhouxueyongts@163.com.

PMID: 31493943
DOI: 10.1016/j.jhazmat.2019.121101

Abstract

The Dubinin-Radushkevitch (D-R) adsorption isotherm model has been widely used to measure adsorption, and it can be used to value the mean free adsorption energy (E). In order to do this, the first step is to calculate the Polanyi adsorption potential (Ɛ). However, we find that the computational formula of Polanyi potential from the D-R equation has a dimensinal problem. Specifically, the units of the equilibrium concentration of solute (C_e) used in the Polanyi potential equation are in chaos. Accurate calculation is the basic characteristic of scientific papers. This comment highlighted the possible flaws related to the calculation of Polanyi potential and analyzed the evolution and application of Polanyi potential equation, and then provided the modified form of Polanyi potential equation. This note offers deeper insights into the Polanyi potential equation, and can help avoid misuse and propagation of the Polanyi potential equation in adsorption research.

Keywords: Adsorption; Dubinin-Radushkevitch (D-R) equation; Polanyi potential; Revision.

Publication types

Letter
Research Support, Non-U.S. Gov't