LIBS and pXRF validation for the removal of Pb by bio-CaCO3 nanoparticles from contaminated water

Abstract In this work, laser-induced breakdown spectroscopy (LIBS) was applied to qualitatively evaluate lead adsorbed from industrial wastewater by nano-CaCO 3 . Eggshell as a natural source of CaCO has been used sorbent owing its low cost and unrivalled adsorption capacity remove Pb contaminated water. The structure morphology nano-powders were investigated using scanning electron microscopy (SEM), transmission microscope (TEM) Fourier transforms infrared (FTIR). LIBS results experimentally validated the obtained portable X-ray fluorescence (pXRF) energy dispersive (EDS), which confirmed feasibility detect traces ions, while process is under governing parameters. Langmuir Freundlich isotherm models model experimental data. kinetics mechanisms studied Lagergren's pseudo-first-order McKay Ho's pseudo-second-order. demonstrated that bio-CaCO nanoparticles could be an effective lead-sorbent wastewater. Accordingly, it possible utilize technique promising practical approach for treatment lead-contaminated recirculation. Graphical abstract Highlights Natural nano eggshell prepared mechanically low-cost adsorbent characterized SEM, TEM, FTIR. removing (II) dependent on pH, metal concentration contact time qualitative analysis with those EDX pXRF spectrometry; in addition, investigated.