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Efficient Removal of Heavy Metals from Aqueous Solutions Using a Bionanocomposite of Eggshell/Ag-Fe

Verónica M. Alamillo-López, Víctor Sánchez-Mendieta, Oscar F. Olea-Mejía, María G. González-Pedroza, Raúl A. Morales-Luckie
2020 Catalysts  

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Eggshell and an easily synthesized bionanocomposite of eggshell with Ag-Fe nanoparticles demonstrated to be efficient adsorbent materials for the removal of lead, arsenic, and mercury from water. The natural material and the bionanocomposite were characterized by TEM and XRD. Ag-Fe nanoparticles vary from 1 to 100 nm in size. Equilibrium times of the adsorption systems were achieved between 4 and 8 h. The experimental adsorption data fitted the pseudo-second and Elovich models; therefore, the
more » ... sorption of heavy metals ions took place mainly by a chemical process. The adsorption capacity of eggshell in mg/g was 7.01 for As5+, 3.90 for Pb2+, and 1.51 for Hg2+, while the nanocomposite adsorption capacity was 17.7 for As5+, 27.8 for Pb2+ and 15.88 for Hg2+.
doi:10.3390/catal10070727 fatcat:4dljptkqvvcxxfdhzglu73yw6e
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Verónica M. Alamillo-López, Víctor Sánchez-Mendieta, Oscar F. Olea-Mejía, María G. González-Pedroza, Raúl A. Morales-Luckie. "Efficient Removal of Heavy Metals from Aqueous Solutions Using a Bionanocomposite of Eggshell/Ag-Fe." Catalysts 10.7 (2020) 727