Abstract

As materials science develops, combining the characteristics of individual components in one substance has become possible to overcome each substance's limitations. In this work, the magnetic Zinc ferrite/bentonite (ZF/BE) was prepared by the co-precipitation method with different ZF amount and then loaded on polyacrylamide (PAM) to form ZF/BE/PAM nanocomposite. The prepared samples were subsequently characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermal analysis (TGA). The results revealed that the nanocomposite appeared as a homogenous agglomeration and the average particles size was nearly 50 nm. XRD results showed that the ZF/BE/PAM nanocomposites have montmorillonite phase. The performance of pristine and ZF/BE/PAM was investigated for removing Alizarin Yellow (ALY) dye from aqueous solutions. The Be/PAM nanocomposites with ZnFe2O4 nanoparticles showed enhanced thermal stability and ALY dye removal efficiency. The ZF/BE/PAM nanoparticles provided a physical barrier to prevent thermal degradation. The ALY dye removal was influenced by the pH, the ZnFe2O4 amount, the adsorbent dose, the contact time and the initial dye concentration. The optimal pH was 2 and the optimal ZnFe2O4 amount was 0.5 g. The adsorption equilibrium data were well described by the Langmuir isotherm model. The results indicated that the Be/PAM nanocomposites with ZnFe2O4 nanoparticles were promising materials for ALY dye removal from wastewater. The 3D Hirshfeld surface analysis showed that the nanosorbent is not perfectly spherical, pointing to a degree of asymmetry in its shape. In addition, the antibacterial properties of the prepared nanocomposite were tested with four strains of bacterial, gram-negative and gram-positive and the ZF/BE/PAM nanocomposites wt% of ZnFe2°4 and upper showed selective activity against gram-positive bacteria. The results illustrated that the ZnFe2°4 played the effective role in enhancing the adsorption and antibacterial activities.

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