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Catalysts 2015, 5(1), 77-87; doi:10.3390/catal5010077

Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration

1
Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain
2
Inorganic Chemistry Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Keith Hohn
Received: 4 November 2014 / Revised: 6 January 2015 / Accepted: 15 January 2015 / Published: 2 February 2015
(This article belongs to the Special Issue Feature Papers to Celebrate the Landmarks of Catalysts)
View Full-Text   |   Download PDF [6499 KB, uploaded 2 February 2015]   |  

Abstract

Water pollution from emerging contaminants (ECs) or emerging pollutants is an important environmental problem. Heterogeneous photocatalytic treatment, as advanced oxidation treatment of wastewater effluents, has been proposed to solve this problem. In this paper, a heterogeneous photocatalytic process was studied for emergent contaminants removal using paracetamol as a model contaminant molecule. TiO2 photocatalytic activity was evaluated using two photocatalytic reactor configurations: Photocatalyst solid suspension in wastewater in a stirred photoreactor and TiO2 supported on glass spheres (TGS) configuring a packed bed photoreactor. The surface morphology and texture of the TGS were monitored by scanning electron microscope (SEM). The influence of photocatalyst amount and wastewater pH were evaluated in the stirred photoreactor and the influence of wastewater flowrate was tested in the packed bed photoreactor, in order to obtain the optimal operation conditions. Moreover, results obtained were compared with those obtained from photolysis and adsorption studies, using the optimal operation conditions. Good photocatalytic activities have been observed and leads to the conclusion that the heterogeneous photocatalytic system in a packed bed is an effective method for removal of emerging pollutants. View Full-Text
Keywords: advanced oxidation technology (AOT); heterogeneous photocatalysis; emerging contaminants (ECs); endocrine disrupting chemicals (EDCs); paracetamol; TiO2; glass spheres advanced oxidation technology (AOT); heterogeneous photocatalysis; emerging contaminants (ECs); endocrine disrupting chemicals (EDCs); paracetamol; TiO2; glass spheres
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Borges, M.E.; García, D.M.; Hernández, T.; Ruiz-Morales, J.C.; Esparza, P. Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration. Catalysts 2015, 5, 77-87.

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