Maria Guadalupe Almanza Martínez, José de Jesús Pérez Bueno*, Elizabeth Manríquez Reza and Maria Luisa Mendoza López Pages 831 - 838 ( 8 )
Background: Pollution in water is of concern because of its negative influence on human health and impact on ecosystems. Three-dimensional (3D) structures in the form of inverse opals and opals-like structures were constructed on a scale of millimeters for their use in the adsorption of heavy metals adsorption on manganese oxide-covered surfaces.
Objective: Manganese oxides both, as commercial powders and as synthesized coatings by the chemical bath method, have a high capacity of lead ions adsorption. The inverse opals and opals-like structures increase the contact area and regulate the flux.
Methods: The chemical bath method was used to coating surfaces of inverse opals and opals-like structures. The size of structures was proposed in millimeters to guarantee an easier flow of water.
Results: The manganese oxide deposits were predominantly constituted by an amorphous phase. The present crystalline forms were identified as γ − MnO2, ε − MnO2, Birnessite, and pyrolusite. The best adsorption was obtained with Mn(II, III) and Mn(II), with 91.4% and 80.6%, respectively.
Conclusion: Mn(II, III) and Mn(II) had approximately three times better performance than oxides of Mn(III), Mn(IV), and chemical bath deposited MnO2 in powder form in the lead adsorption.
Inverse opals, lead adsorption, manganese oxide, opals, MnO2, ecosystems.
Centro de Investigacion y Desarrollo Tecnologico en Electroquimica, S.C. Parque Tecnologico Queretaro-Sanfandila, Pedro Escobedo, Qro., Centro de Investigacion y Desarrollo Tecnologico en Electroquimica, S.C. Parque Tecnologico Queretaro-Sanfandila, Pedro Escobedo, Qro., Universidad Politecnica de Queretaro, Carretera Estatal 420 s/n, El Rosario, 76240 Queretaro, Qro., Tecnologico Nacional de Mexico, Instituto Tecnologico de Queretaro, Av. Tecnologico s/n Esq. M. Escobedo Col. Centro C.P.76000 Queretaro, Qro.