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Journal of Scientific Research and  Studies

Journal of Scientific Research and Studies Vol. 4(10), pp. 245-253, October, 2017

ISSN 2375-8791

Copyright © 2017

Author(s) retain the copyright of this article

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Full Length Research Paper

Use of hydroxyapatite Ca5(PO4)3OH obtained from refuse of cattle slaughterer as a catalyst support: an alternative material for heterogeneous photocatalysis

 

Fabrício V. de Andrade1*, Geraldo M. de Lima2,  Rodinei Augusti2, Márcio G. Coelho3, Yola Pertence4, Isla R. Machado4 and Luciana S. Duarte2

1Universidade Federal de Itajubá-Campus Itabira, 35903-087, Itabira, MG, Brazil.
2Departamento de Química, ICEx, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil.
3Colégio Militar de Belo Horizonte, CMBH, 31255-000, Belo Horizonte, MG, Brazil.
4Centro Universitário Newton de Paiva, 30494-270, Belo Horizonte, MG, Brazil.
 

*Corresponding author. E-mail: fvqandrade@yahoo.com.br, Tel: 0055 31 3839 0897.
 

Accepted 12 September, 2017

 

 Abstract

 

The composite TiO2/hydroxyapatite, prepared by the impregnation method, has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), electronic spectroscopy, and the surface area has been evaluated by Brunauer-Emmett-Teller (BET) technique. The photocatalytic activity was tested in degradation of three different classes of organic molecules in aqueous medium: atrazine (ATR), diclofenac (DFC) and indigo carmine (IC). Electrospray ionization mass spectrometry (ESI-MS) was used to identify the main by-products generated. Based on these results, a mechanism was proposed for the degradation of each component after the photocatalytic process. The degradation rate of each compound was determined by the data acquired from high performance liquid chromatography (HPLC) measurements. Finally, eco-toxicological tests with Artemia salina showed little differences in the toxicity of diclofenac (DFC) and indigo carmine (IC), before and after the degradation process. However, the toxic effects of ATR were reduced by half using the same oxidation approach.

Key words: Photocatalysis, bovine bone, titanium oxide, wastewater, organic pollutants, eco-toxicity.

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Vol. 4 Issue 10
 

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