Kinetic and Thermodynamic Studies on Adsorption of Pb2+ and Cr3+ from Petroleum Refinery Wastewater using Linde Type a Zeolite Nanoparticle.

Abstract

In this research work, lynde type Zeolite (LTA-Zeolite) nanoparticles (ZANPs) were synthesized using kaolin obtained from Darazo Bauchi State, the X-ray fluorescence (XRF) result shows SiO_2,  Al₂O₃ percentage of 60.247 and 38.316 respectively and SiO₂/Al₃O₂ ratio of 1.57 which is suitable for the synthesis of Zeolite-A. The produced nano adsorbent was characterized using X-ray fluorescence (XRF), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Ultraviolate-visible spectroscopy (UV-visible spectroscopy) and N₂-Brunauer–Emmett–Teller(BET)surface analysis. The SEM micrographs revealed well-dispersed Zeolite-A nanoparticles (ZANPs) and the N₂-BET showed a high surface area of 106.250m²/g, pore diameter of 2.1132 (nm) and a pore volume of 0.052 (cc/g)  for ZANPs. The array of removal of Heavy metal pollutants Pb, 96.0% Cr, 90%, ZANPs removing a higher percentage of Lead pollutants. Isothermal models indicated that the Freundlich model (R²)of 0.999 was most suitable for describing the adsorption process, which conformed to pseudo-second-order kinetics(R²) of 0.999Cr.