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

Abstract

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