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Methylene blue adsorption by magnesium oxide nanoparticles immobilized with chitosan (CS-MgONP): Response surface methodology, isotherm, kinetics and thermodynamic studies
Myneni V.R., , Vangalapati M.
Published in Iranian Institute of Research and Development in Chemical Industries
Volume: 39
Issue: 6
Pages: 29 - 42
In this research, a chitosan-immobilized magnesium oxide nanoparticle (CS-MgONP) was synthesized to evaluate it as a prospective adsorbent for a cationic Methylene Blue (MB) dye. For the synthesized adsorbent, functional groups were analyzed through Fourier transform InfraRed (FT-IR) spectroscopy. X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were used to identify the structural and morphological observations. The evaluation of process parameters such as pH (5-9), CS-MgONP dosage (0.2-0.6g/L), initial MB concentration (10-30mg/L), and temperature (283-323K) on MB adsorption was done at an equilibrium agitation time of 70 min using Central Composite Design (CCD) of Response Surface Methodology (RSM). MB removal percentage of 94.51% (desirability=0.829) was obtained under the optimal conditions of pH=7.28, dosage=0.47g/L, initial MB concentration= 19.37mg/L and temperature =309.76K. The adsorption onto CS-MgONP fits well with pseudo-second-order kinetics equation and equilibrium data made the best fit with Langmuir isotherm with maximum MB uptake capacity of 163.87mg/g. © 2020, Iranian Institute of Research and Development in Chemical Industries. All rights reserved.
About the journal
JournalIranian Journal of Chemistry and Chemical Engineering
PublisherIranian Institute of Research and Development in Chemical Industries
Open AccessNo