Linear and non-linear regression analysis for the biosorption kinetics of methylene blue

Authors

  • Ľuboš Vrtoch Department of Biotechnology, University of SS Cyril and Methodius, J. Herdu 2, Trnava, SK-917 01, Slovak Republic
  • Jozef Augustín Department of Biotechnology, University of SS Cyril and Methodius, J. Herdu 2, Trnava, SK-917 01, Slovak Republic

DOI:

https://doi.org/10.36547/nbc.1278

Keywords:

biosorption, kinetics, methylene blue, regression analysis, fungi

Abstract

The nonviable biomass of Rhizopus sp. R-18, Penicillium candidum and Penicillium chrysogenum was studied for biosorption of methylene blue (MB). The sorption of MB was studied be performing batch kinetic experiments. Kinetic measurements showed that sorption of MB reached equilibrium in 4 hours. The batch sorption models, based on a pseudo-first, pseudo-second and pseudo-nth order were applied to predict the rate constant of sorption and the equilibrium capacity. The linear and nonlinear least-square methods were used to obtain the kinetic parameters. The best-fit model was identified using statistic analysis. The results showed that both linear and nonlinear form of pseudo- second order expression could be used to fit the experimental data but nonlinear method may be a better way to obtain the desired parameters. As well the pseudo n-th order kinetic model was successfully applied to the kinetic data. The order (n) of adsorption reaction was found for all employed biosorbents: for Rhizopus sp. R-18 it had value 3.1, P. candidum 3.0 and P. chrysogenum 3.8.

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Published

2021-11-22

How to Cite

Vrtoch, Ľuboš, & Augustín, J. (2021). Linear and non-linear regression analysis for the biosorption kinetics of methylene blue. Nova Biotechnologica Et Chimica, 9(2), 199-204. https://doi.org/10.36547/nbc.1278

Issue

Section

Research Articles
Received 2021-11-22
Published 2021-11-22