Catalytic Ozonation of 4-Nitrophenol in the Presence of Magnetically Separable Titanium Dioxide – Magnetite Composite

Authors

  • D. A. Kazakov Perm National Research Polytechnic University, 614990, Perm, Komsomolsky Ave., 29, Russia
  • V. V. Vol’khin Perm National Research Polytechnic University, 614990, Perm, Komsomolsky Ave., 29, Russia
  • K. Kaczmarski Rzeszów University of Technology, 35-959, Rzeszów, Str. W. Pola, 2, Poland
  • Yu. O. Gulenova Perm National Research Polytechnic University, 614990, Perm, Komsomolsky Ave., 29, Russia
  • M. N. Obirina Perm National Research Polytechnic University, 614990, Perm, Komsomolsky Ave., 29, Russia
  • D. A. Rozhina Perm National Research Polytechnic University, 614990, Perm, Komsomolsky Ave., 29, Russia

DOI:

https://doi.org/10.18321/ectj275

Keywords:

A – catalytic activity; C0 and C – initial and current total organic carbon concentrations in aqueous phase, respectively, mol/l; keff,c and keff – effective rate constants of 4-nitrophenol mineralization during ozonation with and without a catalyst, respectively, min−1; t – time, min.

Abstract

This paper deals with determining catalytic activities of titania (TiO2) with various crystalline structures and magnetite (Fe3O4) during mineralization of 4-nitrophenol in aqueous media by ozonation. Among the titania samples under study, amorphized TiO2 was shown to have the highest catalytic activity, while magnetite was
characterized by the lowest catalytic activity. A procedure is proposed to synthesize a magnetically separable composite (TiO2/Fe3O4) including amorphized titania and magnetite phases, which involves deposition of a catalytically active titania phase on preformed magnetite particles. We also studied the effect of mass ratio of titania and magnetite phases in the composite on its catalytic activity during 4-nitrophenol mineralization by ozonation. It was found that catalytic activity of composite increased as the amorphized titania phase was doped with magnetite phase up to 30% wt but as the magnetite portion in the composite catalyst was further increased, its activity decreased. According to Fourier transform infrared (FTIR) spectroscopy, content of catalytically active sites (hydroxyl groups of titania) in the composite catalyst decreases as compared to the pure phase of amorphized titania. Increase in catalytic activity of the composite as its magnetite content increases to 30% wt can be attributed to increase of accessibility of catalytically active sites (OH groups) for
ozone, because specific surface area and total pore volume of the composite catalyst as determined by BET increase as compared to amorphized TiO2 and catalytically active titania phase is located mostly on surface of magnetite particles which is indicated by scanning electron microscopy (SEM) results and electrophoretic light scattering (ELS) data. It was shown that the obtained composite catalyst of optimized composition, in spite of its fine particles, can be easily recovered from aqueous phase by magnetic field and used repeatedly in ozonation in order to promote water purification process.

References

[1]. H. Zhang, M. Jiang, Q. Xia, D. Zhang, Chem. Eng.Commun. 197 (3) (2010) 377–386.

[2]. M. Tabatabaei, S. Dastmalchi, A. Mehrizad, P. Gharbani, Iranian Journal of Environmental Health Science and Engineering 8:4 (2011).

[3]. F.J. Beltran, F.J. Rivas, O. Gimeno, J. Chem. Technol. Biotechnol. 80 (9) (2005) 973–984.

[4]. Sh. Song, Zh. Liu, Zh. He, A. Zhang, J. Chen, Environ. Sci. Technol. 44 (10) (2010) 3913–3918.

[5]. V. Fontanier, V. Farines, J. Albet, S. Baig, J. Molinier, Ozone Sci. Eng. 27:2 (2005) 115–128.

[6]. J. Markos, A. Brunovska, J. Ilavsky, Chemical Papers 41 (3) (1987) 363–373.

[7]. S.А. Onorin, D.А. Kazakov, V.G. Ponomarev, Butlerovskie soobshhenija [Butlerov Communications] 37:2 (2014) (in Russian).

[8]. D. Mohan, A. Sarwat, V.K. Singh, Chem. Eng. J. 172 (2-3) (2011) 1111–1125.

[9]. M. Sui, L. Sheng, K. Lu, F. Tian, Appl. Catal., B:Environ. 96 (1-2) (2010) 94–100.

[10]. M.I. Stefan, A.R. Hoy, J.R. Bolton, Environ. Sci. Technol. 30 (7) (1996) 2382–2390.

[11]. A.V. Shabalina, G.M. Mokrousov, E.D. Fakhrutdinova, T.I. Izaak, J.J. Wu, Eurasian Chemico Technological Journal 14 (3) (2012) 219–226.

[12]. F. Qi, B. Xu, Zh. Chen, J. Mab, D. Sun, L. Zhang, Sep. Purif. Technol. 66 (2) (2009) 405–410.

[13]. A.V. Kostrikin, O.V. Kuznetsov, O.V. Kosenkova, A.N. Merkulova, I.V. Lin’ko, Voprosy sovremennoy nauki i praktiki [Questions modern science and practice] 2 (8) (2007) 181–186 (in Russian).

[14]. Zh. Shu, Sh. Wang, Journal of Nanomaterials 2009 (2009) doi:10.1155/2009/340217.

[15]. M. Gotic, S. Music, J. Mol. Struct. 834-836 (2007) 445–453.

Downloads

Published

2015-11-20

How to Cite

Kazakov, D. A., Vol’khin, V. V., Kaczmarski, K., Gulenova, Y. O., Obirina, M. N., & Rozhina, D. A. (2015). Catalytic Ozonation of 4-Nitrophenol in the Presence of Magnetically Separable Titanium Dioxide – Magnetite Composite. Eurasian Chemico-Technological Journal, 17(4), 309–316. https://doi.org/10.18321/ectj275

Issue

Vol. 17 No. 4 (2015)

Section

Articles

License

You are free to: Share — copy and redistribute the material in any medium or format. Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Eurasian Chemico-Technological Journal applies a Creative Commons Attribution 4.0 International License to articles and other works we publish.

Subject to the acceptance of the Article for publication in the Eurasian Chemico-Technological Journal, the Author(s) agrees to grant Eurasian Chemico-Technological Journal permission to publish the unpublished and original Article and all associated supplemental material under the Creative Commons Attribution 4.0 International license (CC BY 4.0).

Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Most read articles by the same author(s)