Maria Guadalupe Almanza Martínez, Jose de Jesus Pérez-Bueno*, Elizabeth Manríquez Reza and M. L. Mendoza López Pages 1 - 8 ( 8 )
Background: Pollution in water is of concern because of its negative influence on human health and impact in 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.
Hypothesis/Objective: Manganese oxides both, as commercial powders and as synthesized coatings by the chemical bath method, have high capacity of lead ions adsorption. The inverse opals and opals-like structures increases the contact area and regulates 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.
Lead Adsorption, Opals, Inverse Opals, Manganese Oxide
Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C.; Parque Tecnológico Querétaro-Sanfandila, Pedro Escobedo, Qro., Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C.; Parque Tecnológico Querétaro-Sanfandila, Pedro Escobedo, Qro., Universidad Politécnica de Querétaro, Carretera Estatal 420 s/n, El Rosario, 76240 Querétaro, Qro., Tecnológico Nacional de México, Instituto Tecnológico de Querétaro, Av. Tecnológico s/n Esq. M. Escobedo Col. Centro C.P.76000 Querétaro, Qro.