Green synthesis of silver nanoparticles using Vitex Negundo extracts and their application in the effluent treatment of cracker industries

Abstract

Silver nanoparticles were prepared by green synthesis, which is an eco-friendly and inexpensive method. The synthesis was carried out using Vitex Negundo leaf extract at room temperature. The nanoparticles were encapsulated with Poly Vinyl Alcohol (PVA) matrix to avoid agglomeration. The formation of silver nanoparticles was confirmed by X-ray Diffraction (XRD). The morphology of the nanoparticles was investigated by scanning electron microscope (SEM). Energy Dispersive X-ray Spectrum (EDX) confirmed the presence of elemental Ag. Adsorption experiments confirmed the removal of toxic cadmium and chromium present in the industrial effluents as analysed by atomic absorption spectroscopy. The silver nanoparticles showed maximum adsorption efficiency for chromium compared to cadmium.