Abstract
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.
Keywords: Inverse opals, lead adsorption, manganese oxide, opals, MnO2, ecosystems.
Graphical Abstract
[http://dx.doi.org/10.1016/j.mrrev.2008.03.003] [PMID: 18436472]
[http://dx.doi.org/10.1016/j.envint.2010.04.011] [PMID: 20466424]
[http://dx.doi.org/10.1016/j.cej.2015.06.068]
[http://dx.doi.org/10.1080/19443994.2015.1036784]
[http://dx.doi.org/10.1080/19443994.2015.1120685]
[http://dx.doi.org/10.1134/S001670291903008X]
[http://dx.doi.org/10.1016/j.jhazmat.2018.04.080] [PMID: 29783153]
[http://dx.doi.org/10.1016/j.jhazmat.2019.05.057]] [PMID: 31203120]
[http://dx.doi.org/10.1016/j.jhazmat.2017.10.058] [PMID: 29150138]
[http://dx.doi.org/10.1016/j.jhazmat.2019.02.031] [PMID: 30784965]
[http://dx.doi.org/10.1016/j.jhazmat.2019.02.013] [PMID: 30776604]
[http://dx.doi.org/10.1016/j.jhazmat.2019.05.087] [PMID: 31173986]
[http://dx.doi.org/10.1016/j.jhazmat.2018.09.076] [PMID: 30336333]
[http://dx.doi.org/10.1016/j.cej.2016.08.121]
[http://dx.doi.org/10.1016/j.jhazmat.2018.10.004] [PMID: 30300776]
[http://dx.doi.org/10.1016/j.jhazmat.2018.08.082] [PMID: 30176414]
[http://dx.doi.org/10.1016/j.jhazmat.2019.120768]] [PMID: 31220649]
[http://dx.doi.org/10.1016/j.cej.2013.03.128]
[http://dx.doi.org/10.1016/j.seppur.2007.07.006]
[http://dx.doi.org/10.1016/j.mineng.2010.07.007]
[http://dx.doi.org/10.1016/j.jhazmat.2006.02.021] [PMID: 16603312]
[http://dx.doi.org/10.1016/S1001-0742(09)60097-8 ] [PMID: 20397410]
[http://dx.doi.org/10.1016/j.jhazmat.2009.02.145] [PMID: 19345485]
[http://dx.doi.org/10.1039/C2CS35317B] [PMID: 23079696]
[http://dx.doi.org/10.1023/A:1021197029004]
[http://dx.doi.org/10.1590/0104-6632.20160332s00003588]