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Comparison of magnetic Fe3O4/chitosan and arginine-modified magnetic Fe3O4/chitosan nanoparticles in simultaneous multidye removal: Experimental design and multicomponent analysis

Tabaraki, Reza, Sadeghinejad, Negar
International journal of biological macromolecules 2018 v.120 pp. 2313-2323
Fourier transform infrared spectroscopy, biosorbents, biosorption, chitosan, dyes, energy-dispersive X-ray analysis, experimental design, indigo carmine, iron oxides, magnetism, nanoparticles, neural networks, pH, response surface methodology, scanning electron microscopy, surface area, thermogravimetry
In this study, multidye biosorption of Titan yellow (TY), Fuchsine acid (FA) and Indigo carmine (IC) in ternary mixture onto magnetic Fe3O4/chitosan nanoparticles (MFe3O4/CS NPs) and arginine-modified MFe3O4/CS NPs was investigated. Simultaneous determination of TY, IC, and FA in ternary solutions was performed by principal component-wavelet neural network (PC-WNN). Characterizations of the synthesized particles were performed by scanning electron microscopy (SEM), elemental analysis (EDAX), thermo-gravimetric analysis (TGA), vibrating sample magnetometer (VSM), Fourier transform infrared (FT-IR) spectroscopy and BET surface area analysis. Result VSM indicate the saturation magnetization values of bare Fe3O4 and arginine-modified magnetic chitosan nanoparticles were about 55.00, 23.04 emu/g, respectively. Also result of BET analysis showed chitosan, MFe3O4/CSNPs, and arginine-modified are nonporous and specific surface area for arginine-modified is more than chitosan, MFe3O4/CSNPs. Response surface methodology (RSM) with Box-Behnken design was used to optimize experimental parameters (biosorbent dose, pH, and time). At optimum conditions, maximum total biosorption capacity of MFe3O4/CSNPs and arginine-modified MFe3O4/CSNPs for anionic dyes was 0.385 and 0.681 mmol g−1, respectively. Arginine-modified magnetic Fe3O4/CSNPs biosorption capacity was twice better than that of magnetic Fe3O4/CSNPs. The biosorption processes were kinetically followed by a pseudo-second order model. Fourteen isotherms were also fitted to biosorption equilibrium data.