Synthesis of Fe3O4/Eggshell and egg membrane Nanocomposite and Application for Adsorption of Cationic and Anionic Dyes

Document Type: Original Research Paper

Authors

Department of Chemistry, University of Guilan, Rasht, Iran

10.22034/jna.2019.669599

Abstract

This work is reported on the synthesis of Fe3O4/eggshell nanocomposites in the absence of any
stabilizer or surfactant. Fe3O4 magnetic nanoparticles were established on the egg shell. The adsorption
of Malachite green (MG) and Crystal violet (CV) as cationic dyes and Eriochrome Black T (EBT) as an
anionic dye by magnetite nanoparticles loaded egg shell (MNLES) and magnetite nanoparticles loaded
egg membrane (MNLEM) were studied. FT-IR, XRD and SEM were used for specification of adsorbents.
XRD pattern of MNLES and MNLEM were corresponded to pure magnetite at 2θ= 30.2o, 35.6o, 43.3o and
57.2o. FTIR showed that main peak similar magnetite in 580, 1620 and 3407cm-1. SEM pictures showed
that Fe3O4 nanoparticles in nm size loaded on natural adsorbents. Adsorbents dose, pH and contact
time as parameters that have an effect on dye removal were investigated. Pseudo-first order, pseudosecond
order, intraparticle diffusion and Elovich models were used for study of kinetic of adsorption. The
sorption of the MG, EBT, CV on the MNLEM were pseudo second-order model. The sorption of the MG
and EBT on MNLES were described by Elovich and pseudo second-order model. Value of qmax from the
Langmuir model for adsorption of CV, EBT and MG were 61.72, 21.69 and 38.31mg g -1 for MNLEM and
qmax for adsorption of EBT, MG on the MNLES was 40.0 and 25.12mg g -1. It was found MNLES and MNLEM
can be used as efficient adsorbents for removal of EBT more than cationic dyes (MG, CV).

Keywords