Synthesis And Characterization Of Amorphous Silica From Oil Palm Empty Palm Fruit Bunch

Abstract

The valorization of agroindustrial solid wastes, particularly oil palm residues such as empty fruit bunches (EFB), for sustainable and green chemistry initiatives has gained momentum in recent years. This paper explores the extraction of amorphous silica from EFB ash as a means to repurpose this abundant waste material. Characterization of the silica nanoparticles was conducted through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), particle size and zeta potential analysis, and X-ray diffractometer (XRD) analysis. SEM images revealed irregular shapes and varied compositions of the nanoparticles, while FTIR confirmed the presence of silanol groups and CTAB molecules on the surface. Particle size analysis indicated a size of approximately 962 nm with a zeta potential of -26.9 mV, suggesting negatively charged surfaces. XRD analysis confirmed the amorphous nature of the silica nanoparticles. Overall, this study demonstrates a novel approach to extract silica from EFB ash, highlighting its potential for various applications such as adsorbents, catalysts, and biopolymers, thus contributing to sustainable waste management and green chemistry practices.