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Open AccessArticle

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

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Posgrado en Ciencia de Materiales Facultad de Química, Universidad Autónoma del Estado de, Mexico, Avenida Paseo Colón, esquina paseo Tollocan s/n., Toluca de Lerdo C.P. 50000, Mexico
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Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, San Cayetano, Toluca C.P. 50200, Mexico
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(7), 727; https://doi.org/10.3390/catal10070727
Received: 25 May 2020 / Revised: 23 June 2020 / Accepted: 24 June 2020 / Published: 30 June 2020
(This article belongs to the Special Issue Green Catalysts: Application to Waste and Groundwater Treatment)
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 adsorption 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+. View Full-Text
Keywords: eggshell; silver-iron nanoparticles; adsorption; heavy metals removal eggshell; silver-iron nanoparticles; adsorption; heavy metals removal
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Alamillo-López, V.M.; Sánchez-Mendieta, V.; Olea-Mejía, O.F.; González-Pedroza, M.G.; Morales-Luckie, R.A. Efficient Removal of Heavy Metals from Aqueous Solutions Using a Bionanocomposite of Eggshell/Ag-Fe. Catalysts 2020, 10, 727.

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