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Catalysts 2019, 9(4), 343; https://doi.org/10.3390/catal9040343

Experimental Design and Optimization of Triclosan and 2.8-Diclorodibenzeno-p-dioxina Degradation by the Fe/Nb2O5/UV System

1
Departamento de Engenharia Química, Universidade Tecnológica Federal do Paraná, Av Monteiro Lobato, s/n—Km 04, Ponta Grossa, PR 84016-210, Brazil
2
Departamento de Engenharia Química, Universidade Estadual de Maringá, Avenida Colombo, 5790, Maringá, PR 87020-900, Brazil
3
Departamento de Química, Universidade Federal de Santa Catarina, Campus Reitor João David Ferreira Lima, R. Eng. Agronômico Andrei Cristian Ferreira, s/n, Florianópolis, SC 88040-900, Brasil
4
Departamento de Química, Universidade Tecnológica Federal do Paraná, Via do Conhecimento, s/n—Km 01, Pato Branco, PR 85503-390, Brazil
5
Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, Av Monteiro Lobato, s/n—Km 04, Ponta Grossa, PR 84016-210, Brazil
*
Author to whom correspondence should be addressed.
Received: 11 February 2019 / Revised: 18 March 2019 / Accepted: 27 March 2019 / Published: 8 April 2019
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Abstract

This study describes the experimental design and optimization of the photocatalytic reaction using the immobilized catalyst Fe/Nb2O5 in the degradation of Triclosan and 2.8-DCDD. The techniques employed to characterize the photocatalysts were: specific surface area, average pore volume, average pore diameter, photo-acoustic spectroscopy (PAS), X-ray diffraction (XRD), and scanning electron microscopy (SEM/EDS). The reaction parameters studied were pH, catalyst concentration, catalyst calcination temperature, and nominal metallic charge. The results indicated that the immobilized Fe/Nb2O5 catalysts were efficient in the degradation of Triclosan and 2.8-dichlorodibenzene-p-dioxin. The catalysts with nominal metal loading of 1.5% Fe calcined at 873 K showed the highest constant reaction rate and the lowest half-life 0.069 min−1 and 10.04 min. Tests in different matrices indicated that the photocatalytic reaction using aqueous solution containing Cl is faster when compared with the ultrapure water matrix. View Full-Text
Keywords: Fe/Nb2O5 immobilized catalyst; emerging pollutants; degradation Fe/Nb2O5 immobilized catalyst; emerging pollutants; degradation
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Fidelis, M.Z.; Abreu, E.; Dos Santos, O.A.A.; Chaves, E.S.; Brackmann, R.; Dias, D.T.; Lenzi, G.G. Experimental Design and Optimization of Triclosan and 2.8-Diclorodibenzeno-p-dioxina Degradation by the Fe/Nb2O5/UV System. Catalysts 2019, 9, 343.

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