SYNTHESIS, CHARACTRIZATION AND APPLICATION OF NOVEL METALLONANOCOMPOSITE SYSTEMS IN VARIOUS PROCESSES OF ENVIRONMENTAL AND INDUSTERIAL IMPACT

Abstract

In the present work, magnetite nanoparticles (M NPs) were incorporated into poly (amido amine) (PAMAM, G=2) dendrimer matrix to form the mother composite M NPs (1*10-3 M)@PAMAM. Dendrimer-modified composites were synthesized through conjugation with rice straw ash (RSA) or montomorillonite (MMT). Hybrid composites were obtained by applying (1*10-3 M, 3*10-3 M and 6*10-3 M) M NPs, namely M NPs @PAMAM@RSA and M NPs @PAMAM@MMT. In addition polyaniline based-RSA composite was prepared, followed by application of M NPs to form M NPs @PANI@RSA hybrid nanocomposite with the same molar ratios. Structural characteristics of the various samples were investigated through XRD, FTIR techniques. Morphological textural characteristics were estimated from TEM, SEM and low-temperature adsorption-desorption isotherms of N2 and pore size distribution analysis. The stability of colloidal system and conductivity were investigated by DLS and zeta potential. Different linkages and interactions during the synthesis processes were investigated. All the synthesized hybrid composites were applied in removal of hazardous dyes (e.g., XO, MG and ROS.HCl), ions (e.g., Br-, NO-3, and NH4+) and heavy metals (e.g., Hg). Keywords: Magnetite nanoparticles; PAMAM dendrimer; Polyaniline; Hybrid nanocomposites; Montomorillonite; Rice Straw Ash