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Desalination and Water Treatment Volume 57, 2016 - Issue 54
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Articles

Valorisation of a by-product from the TiO2 pigment industry for its application in advanced oxidation processes

E. Pulido MeliánCentro Instrumental Químico—Físico para el Desarrollo de Investigación Aplicada (CIDIA)—Dpto. de Química, Edificio Central del Parque Científico Tecnológico, Grupo de Fotocatálisis y Espectroscopia Aplicada al Medioambiente (FEAM, Unidad Asociada al CSIC por el Instituto de Ciencias de Materiales de Sevilla), Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017Las Palmas, Spain, Tel. +34 928457298Correspondence[email protected]
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L. Santana VieraCentro Instrumental Químico—Físico para el Desarrollo de Investigación Aplicada (CIDIA)—Dpto. de Química, Edificio Central del Parque Científico Tecnológico, Grupo de Fotocatálisis y Espectroscopia Aplicada al Medioambiente (FEAM, Unidad Asociada al CSIC por el Instituto de Ciencias de Materiales de Sevilla), Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017Las Palmas, Spain, Tel. +34 928457298Correspondence[email protected]
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E. OtalDepartment of Chemical and Environmental Engineering, School of Engineering (ETSI), University of Seville, Camino de los Descubrimientos s/n, 41092Seville, Spain, Tel. +34 954559529, Tel. +34 954481379, Tel. +34 954487282Correspondence[email protected]
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J.M. Doña RodríguezCentro Instrumental Químico—Físico para el Desarrollo de Investigación Aplicada (CIDIA)—Dpto. de Química, Edificio Central del Parque Científico Tecnológico, Grupo de Fotocatálisis y Espectroscopia Aplicada al Medioambiente (FEAM, Unidad Asociada al CSIC por el Instituto de Ciencias de Materiales de Sevilla), Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017Las Palmas, Spain, Tel. +34 928457298Correspondence[email protected]
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Dunia E. SantiagoCentro Instrumental Químico—Físico para el Desarrollo de Investigación Aplicada (CIDIA)—Dpto. de Química, Edificio Central del Parque Científico Tecnológico, Grupo de Fotocatálisis y Espectroscopia Aplicada al Medioambiente (FEAM, Unidad Asociada al CSIC por el Instituto de Ciencias de Materiales de Sevilla), Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017Las Palmas, Spain, Tel. +34 928457298Correspondence[email protected]
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C. Fernández-PereiraDepartment of Chemical and Environmental Engineering, School of Engineering (ETSI), University of Seville, Camino de los Descubrimientos s/n, 41092Seville, Spain, Tel. +34 954559529, Tel. +34 954481379, Tel. +34 954487282Correspondence[email protected]
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O. González DíazCentro Instrumental Químico—Físico para el Desarrollo de Investigación Aplicada (CIDIA)—Dpto. de Química, Edificio Central del Parque Científico Tecnológico, Grupo de Fotocatálisis y Espectroscopia Aplicada al Medioambiente (FEAM, Unidad Asociada al CSIC por el Instituto de Ciencias de Materiales de Sevilla), Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017Las Palmas, Spain, Tel. +34 928457298Correspondence[email protected]
&
L.F. VilchesDepartment of Chemical and Environmental Engineering, School of Engineering (ETSI), University of Seville, Camino de los Descubrimientos s/n, 41092Seville, Spain, Tel. +34 954559529, Tel. +34 954481379, Tel. +34 954487282Correspondence[email protected]
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Pages 26211-26221 | Received 14 Dec 2015, Accepted 25 Feb 2016, Published online: 15 Mar 2016
 
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Abstract

The aim of this study was to find a recycling use for waste material (WTiO2) that results from the extraction process of TiO2 from ilmenite in the pigment industry. In view of its high TiO2 content, the photocatalytic activity of this material was tested in the degradation of humic and fulvic acid substances (HFAs) and showed low levels of photoactivity, as was the case for the commercial photocatalyst Aeroxide TiO2 P25 (P25). However, due to its high Fe3+ content, an important application was observed for WTiO2 as an HFA coagulant and catalyst in Fenton and photo-Fenton processes. A two-stage process of coagulation and photo-Fenton treatment was subsequently designed and conducted at laboratory and small pilot scale. High percentages (above 95%) were obtained in total organic carbon (TOC) removal.

Acknowledgements

The authors acknowledge the financial support for this research from the Spanish Ministry of Science and Innovation (MICINN) under the project FOXMORE (CTM2006-05114) and from the Spanish Ministry of Economy and Competitiveness under the Infrastructure Project UNLP10-3E-726, co-financed with ERDF funds. E. Pulido Melián would also like to thank the University of Las Palmas de Gran Canaria for her postdoctoral contract.

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