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

This work is reported on the synthesis of Fe3O4/eggshell nanocomposites in the absence of anystabilizer or surfactant. Fe3O4 magnetic nanoparticles were established on the egg shell. The adsorptionof Malachite green (MG) and Crystal violet (CV) as cationic dyes and Eriochrome Black T (EBT) as ananionic dye by magnetite nanoparticles loaded egg shell (MNLES) and magnetite nanoparticles loadedegg 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 and57.2o. FTIR showed that main peak similar magnetite in 580, 1620 and 3407cm-1. SEM pictures showedthat Fe3O4 nanoparticles in nm size loaded on natural adsorbents. Adsorbents dose, pH and contacttime as parameters that have an effect on dye removal were investigated. Pseudo-first order, pseudosecondorder, intraparticle diffusion and Elovich models were used for study of kinetic of adsorption. Thesorption of the MG, EBT, CV on the MNLEM were pseudo second-order model. The sorption of the MGand EBT on MNLES were described by Elovich and pseudo second-order model. Value of qmax from theLangmuir model for adsorption of CV, EBT and MG were 61.72, 21.69 and 38.31mg g -1 for MNLEM andqmax for adsorption of EBT, MG on the MNLES was 40.0 and 25.12mg g -1. It was found MNLES and MNLEMcan be used as efficient adsorbents for removal of EBT more than cationic dyes (MG, CV).