Search Results - "Silveira, Jefferson E"

The photocatalytic reduction of NO3− to N2 with ilmenite (FeTiO3): Effects of groundwater matrix by Silveira, Jefferson E., Ribeiro, Alyson R., Carbajo, Jaime, Pliego, Gema, Zazo, Juan A., Casas, Jose A.

“…This work analyzes the role of natural groundwater, as well as the effect of HCO3−, Ca2+, Mg2+, K+, SO42- and Cl− concentrations, upon the photocatalytic…”
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Landfill leachate treatment by sequential combination of activated persulfate and Fenton oxidation by Silveira, Jefferson E., Zazo, Juan A., Pliego, Gema, Casas, Jose A.

“…[Display omitted] •A sequential PS/Fenton oxidation is proposed to treat landfill leachates.•PS activation can be intensified by combining electrolysis, FeTiO3…”
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UV-LED/ilmenite/persulfate for azo dye mineralization: The role of sulfate in the catalyst deactivation by Silveira, Jefferson E., Paz, Wendel S., Garcia-Muñoz, Patricia, Zazo, Juan A., Casas, Jose A.

“…[Display omitted] •UV-LED/ilmenite becomes a feasible alternative to activate persulfate.•A mineralization degree above 95% was reached under optimal…”
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Coupled heat-activated persulfate – Electrolysis for the abatement of organic matter and total nitrogen from landfill leachate by Silveira, Jefferson E., Zazo, Juan A., Casas, Jose A.

“…•The coupled PS/electrolysis oxidation allows to remove separately TOC and TN.•Heat-activated PS efficiently removes TOC but has a little impact on TN…”
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Indirect decolorization of azo dye Disperse Blue 3 by electro-activated persulfate by Silveira, Jefferson E., Garcia-Costa, Alicia L., Cardoso, Tais O., Zazo, Juan A., Casas, Jose A.

“…This work assesses the role of the operational conditions upon the electro-activation of persulfate (electro-PS) using Ti/IrO2Ta2O5 electrode for the…”
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Selective reduction of nitrate to N2 using ilmenite as a low cost photo-catalyst by Zazo, Juan A., García-Muñoz, P., Pliego, G., Silveira, Jefferson E., Jaffe, P., Casas, Jose A.

“…[Display omitted] •FeTiO3 emerges as a suitable photocatalyst to remove NO3− in ground and surface water.•The reduction of NO3− to N2 occurs mainly via NO2−…”
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Diclofenac photodegradation with the Perovskites BaFeyTi1-yO3 as catalysts by Rodrigues, Ana Sofia, Silveira, Jefferson E., Carbajo, Jaime, Zazo, Juan A., Casas, Jose A., Fernandes, Annabel, Pacheco, Maria José, Ciríaco, Lurdes, Lopes, Ana

“…Perovskite oxides BaFe y Ti 1- y O 3 , with y = 0, 0.6, 0.8 and 1, were prepared by ceramic (CM) and complex polymerization methods (CPM) and utilized in…”
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Electrochemical oxidation of landfill leachate in a flow reactor: optimization using response surface methodology by Silveira, Jefferson E, Zazo, Juan A, Pliego, Gema, Bidóia, Edério D, Moraes, Peterson B

“…Response surface methodology based on Box-Behnken (BBD) design was successfully applied to the optimization in the operating conditions of the electrochemical…”
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Electro activation of persulfate using iron sheet as low-cost electrode: the role of the operating conditions by Silveira, Jefferson E., Cardoso, Tais O., Barreto-Rodrigues, Marcio, Zazo, Juan A., Casas, José A

“…This work assesses the role of the operational conditions upon the electro-activation of persulfate (PS) using sacrificed iron electrode as a continuous…”
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Nanoscale Fe/Ag particles activated persulfate: optimization using response surface methodology by Silveira, Jefferson E, Barreto-Rodrigues, Marcio, Cardoso, Tais O, Pliego, Gema, Munoz, Macarena, Zazo, Juan A, Casas, José A

“…This work studied the bimetallic nanoparticles Fe-Ag (nZVI-Ag) activated persulfate (PS) in aqueous solution using response surface methodology. The…”
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Graphite as catalyst for UV-A LED assisted catalytic wet peroxide oxidation of ibuprofen and diclofenac by Garcia-Costa, Alicia L., Silveira, Jefferson E., Zazo, Juan A., Dionysiou, Dionysios D., Casas, Jose A.

“…•Graphite is active in UV-A assisted CWPO of IBU and DCF.•Degradation consists of a H2O2 mediated adsorption followed by oxidation.•UV-A radiation greatly…”
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Nitrate removal in saline water by photo-reduction using natural FeTiO3 as catalyst by Silveira, Jefferson E., Garcia-Costa, Alicia L., Carbajo, Jaime, Ribeiro, Alyson R., Pliego, Gema, Paz, Wendel S., Zazo, Juan A., Casas, Jose A.

“…•Nitrate photoreduction using ilmenite and oxalic acid is feasible in saline water.•Oxalic acid scavenging in presence of Ca2+ hinders the NO3−…”
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FeTiO3: A low-cost and efficient photocatalytic mineral for sustainable NOx abatement by Silveira, Jefferson E., Garcia, Vinícius G., Pacheco, Luíza T., Paz, Wendel S., Casas, Jose A., Zazo, Juan A.

“…•FeTiO3 is presented as a low-cost and effective photocatalyst for NOx removal in flue gases.•Demonstrated high photocatalytic efficiency in NOx abatement,…”
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A comprehensive study of the reduction of nitrate on natural FeTiO3: Photocatalysis and DFT calculations by Silveira, Jefferson E., de Souza, Aramille S., Pansini, Fernando N.N., Ribeiro, Alyson R., Scopel, Wanderlã L., Zazo, Juan A., Casas, Jose A., Paz, Wendel S.

“…Experimental and theoretical investigation of the capacity of the natural ilmenite (FeTiO3) to reduce nitrate (NO3−) from ultra-pure and mineral water is…”
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An approach to highly polluted wastewater management for zero liquid discharge: The case of landfill leachate by Silveira, Jefferson E., Garbellini, Lucas R., Ribeiro, Alyson R., Yepez, Alessandro, Furlanetto, Tiago, Oliveira, Gabriel M., Paz, Wendel, Pliego, Gema, Zazo, Juan A., Casas, Jose A.

“…This work aims to bring the treatment of highly polluted wastewater to the concept of zero liquid discharge, using landfill leachate as a representative…”
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Franckeite-derived van der Waals heterostructure with highly efficient photocatalytic NOx abatement: Theoretical insights and experimental evidences by Silveira, Jefferson E., Inacio, Guilherme J., Batista, Nathanael N., Morais, Wallace P., Menezes, Marcos G., Zazo, Juan A., Casas, Jose A., Paz, Wendel S.

“…Addressing the pressing issue of nitrogen oxides (NOx) pollution requires the identification and optimization of efficient materials for NOx removal. This…”
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Franckeite-derived van der Waals heterostructure with highly efficient photocatalytic NO abatement: Theoretical insights and experimental evidences by Silveira, Jefferson E., Inacio, Guilherme J., Batista, Nathanael N., Morais, Wallace P., Menezes, Marcos G., Zazo, Juan A., Casas, Jose A., Paz, Wendel S.

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Optimization of Disperse Blue 3 mineralization by UV-LED/FeTiO3 activated persulfate using response surface methodology by Silveira, Jefferson E., Claro, Elis Marina Turini, Paz, Wendel S., Oliveira, Adriana S., Zazo, Juan A., Casas, Jose A.

“…•UV-LED/ilmenite/heat becomes a feasible alternative to activate persulfate.•A mineralization degree above 96% was reached under optimal conditions.•The…”
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