Nonlinear Fitting of Iron Sorption on Bentonite to Theoretical Isotherm Models

Array

Authors

  • K. Stepova Lviv State University of Life Safety, Lviv, Ukraine
  • L. Sysa Lviv State University of Life Safety, Lviv, Ukraine
  • R. Konanets Lviv State University of Life Safety, Lviv, Ukraine

DOI:

https://doi.org/10.15330/pcss.23.2.270-276

Keywords:

bentonite, microwave, adsorption, iron, non-linear fitting

Abstract

A comparative analysis of adsorption models application for the description of experimental isotherms of iron adsorption on two samples: natural bentonite and bentonite irradiated with microwave irradiation. Sorption isotherms are described using the theories of Langmuir, Freundlich, Redlich-Peterson and Langmuir-Freundlich. The constants and parameters of these equations are determined. Nonlinear fitting of experimental data to the theoretical models of isotherms showed that adsorption by native bentonite corresponds to the three-parameter Redlich-Peterson model, and microwave irradiated - to the Freindlich isotherm. This modeling allows to predict the maximum adsorption capacity, which is 37.7 mg / g of natural bentonite and 64.4 mg / g of the modified sample.

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Published

2022-05-25

How to Cite

Stepova, K., Sysa, L., & Konanets, R. (2022). Nonlinear Fitting of Iron Sorption on Bentonite to Theoretical Isotherm Models : Array. Physics and Chemistry of Solid State, 23(2), 270–276. https://doi.org/10.15330/pcss.23.2.270-276

Issue

Section

Scientific articles (Technology)