Green Synthesized Cerium Oxide Nanoparticles as Efficient Adsorbent for Removal of Fluoride Ion from Aqueous Solution

The preparation of cerium oxide nanoparticles from seed extract of Litchi chinensis was synthesized by a green synthesis method. Chemical and physical properties of the synthesized adsorbent were confirmed by Fourier transform infrared spectrometer (FT-IR), powder X-ray diffraction technique (PXRD), high-resolution transmission electron microscope (HR-TEM), scanning electron microscope (SEM), energy dispersive spectrum (EDS), and Raman spectrum. The batch process is used to calculate the removal efficacy of fluoride ion from the aqueous solution at different pH, temperature, contact duration, and initial fluoride concentration. The maximum removal efficiency was observed to be attained at pH 7 in one hour. The Langmuir model as well as the pseudo-second-order model provides accurate description for the adsorption isotherm and kinetics. According to HR-TEM analysis, the size of the cerium oxide nanoparticle is having 10 nm with spherical shape. The results from this study indicated the ability of cerium oxide nanoparticles prepared from Litchi chinensis, to remove fluoride in water, and had possibility to clean wastewater treatment.

Automated summary

Cerium oxide nanoparticles were synthesized from Litchi chinensis seed extract using a green synthesis method. The synthesized adsorbent was characterized using various techniques, including FT-IR, PXRD, HR-TEM, SEM, EDS, and Raman spectrum. The efficiency of fluoride ion removal from aqueous solution was investigated under different conditions. The maximum removal efficiency was achieved at pH 7 within one hour. The results suggested that the cerium oxide nanoparticles prepared from Litchi chinensis have potential for fluoride removal and wastewater treatment.