Bulletin of Chemical Reaction Engineering & Catalysis
2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)

The Dependency of Kinetic Parameters as a Function of Initial Solute Concentration: New Insight from Adsorption of Dye and Heavy Metals onto Humic-Like Modified Adsorbents

Rahmat Basuki (Department of Chemistry, Universitas Pertahanan RI, Bogor, 16810 || Indonesia Department of Chemistry, Universitas Gadjah Mada, Yogyakarta 55281)
Bambang Rusdiarso (Department of Chemistry, Universitas Gadjah Mada, Yogyakarta 55281)
Sri Juari Santosa (Department of Chemistry, Universitas Gadjah Mada, Yogyakarta 55281)
Dwi Siswanta (Department of Chemistry, Universitas Gadjah Mada, Yogyakarta 55281)



Article Info

Publish Date
20 Dec 2021

Abstract

Kinetics parameters are the essential issue in the design of water treatment systems for pollutants uptake. Though numerous studies have identified the boundary conditions that exert influence on the kinetics parameters, the influence of the dynamic initial solute concentration (C0) to the kinetic parameters generated from fitting kinetics model to experimental data has not been investigated thoroughly. This study revealed a change in the kinetics parameter value due to changes in the adsorption mechanism as an effect of dynamic C0. It was observed that at higher C0 the adsorbed solute at equilibrium (qe) increases and it takes longer time to reach equilibrium. As a result, the kinetics rate constant (k) calculated from adsorption reaction model (Lagergren, Ho, Santosa, and RBS) was decreased. In general, Ho model exhibit higher correlation coefficient value (R2) among the other model at low C0. At high C0, Ho’s R2 tend to decrease while the Lagergren and RBS’s R2 was increased. The amendment mechanism from external mass transport to intra-particle diffusion as a rate limiting step was evidenced by Boyd and Weber-Morris kinetics model. Further, the physicochemical properties of the adsorbent used in this work: chitin and Fe3O4 modified horse dung humic acid (HDHA-Fe3O4 and HDHA-Ch, respectively) with the solute: Pb(II), Methylene Blue (MB), and Ni(II) was deeply discussed in this paper. The outcomes of this work are of prime significance for effective and optimum design for pollutant uptake by adsorption equipment. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Copyrights © 2021






Journal Info

Abbrev

bcrec

Publisher

Subject

Chemical Engineering, Chemistry & Bioengineering Chemistry

Description

Bulletin of Chemical Reaction Engineering & Catalysis (e-ISSN: 1978-2993), an international journal, provides a forum for publishing the novel technologies related to the catalyst, catalysis, chemical reactor, kinetics studies, and chemical reaction ...