Commenced in January 2007
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Application of Advanced Oxidation Processes to Mefenamic Acid Elimination

Authors: Olga Gimeno, Javier Rivas, Angel Encinas, Fernando Beltran

Abstract:

The elimimation of mefenamic acid has been carried out by photolysis, ozonation, adsorption onto activated carbon (AC) and combinations of the previous single systems (O3+AC and O3+UV). The results obtained indicate that mefenamic acid is not photo-reactive, showing a relatively low quantum yield of the order of 6 x 10-4 mol Einstein-1. Application of ozone to mefenamic aqueous solutions instantaneously eliminates the pharmaceutical, achieving simultaneously a 40% of mineralization. Addition of AC to the ozonation process does not enhance the process, moreover, mineralization is completely inhibited if compared to results obtained by single ozonation. The combination of ozone and UV radiation led to the best results in terms of mineralization (60% after 120 min).

Keywords: Photolysis, mefenamic acid, ozone, activated carbon.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1071166

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References:


[1] I. G├╝ltekin, and N.H. Ince, "Synthetic endocrine disruptors in the environment and water remediation by advanced oxidation processes," J. of Environ. Manag., 85, pp. 816-832, 2007.
[2] S. Esplugas, D.M. Bila, L.G.T. Krause, and M. Dezotti, "Ozonation and advanced oxidation technologies to remove endocrine disrupting chemicals (EDCs) and pharmaceuticals and personal care products (PPCPs) in water effluents," J. Hazard. Mat., 149, pp. 631-642, 2007.
[3] F.J. Rivas, A. Encinas, B. Acedo, and F.J. Beltrán, "Mineralization of bisphenol A by advanced oxidation processes," J. of Chem. Technol. and Biotechnol., 84, pp. 589-594, 2009.
[4] K. Moribe, R. Kinoshita, K. Higashi, Y. Tozuka, and K. Yamamoto, "Coloration phenomenon of mefenamic acid in mesoporous silica FSM- 16," Chem. and Pharmac. Bull., 58, pp. 214-218, 2010.
[5] F.J. Beltrán, P. Pocostales, P. Alvarez, and A. Oropesa, "Diclofenac removal from water with ozone and activated carbon," J. Hazard. Mat., 163, pp. 768-776, 2009.
[6] F.J. Rivas, O. Gimeno, T. Borralho, and M. Carbajo, "UV-C photolysis of endocrine disruptors. The influence of inorganic peroxides," J. Hazard. Mat., 174, pp. 393-397, 2010.
[7] I. Kim, N. Yamashita, and H. Tanaka, "Photodegradation of pharmaceuticals and personal care products during UV and UV/H2O2 treatments," Chemosphere, 77, pp. 518-525, 2009.
[8] F.J. Rivas, F.J. Beltrán, and B. Acedo, "Chemical and photochemical degradation of acenaphthylene. Intermediate identification," J. Hazard. Mat., 75, pp. 89-98, 2000.
[9] S.J. Khan, and H.S. Weinberg, "Characterisation of carbonyl byproducts of drinking water ozonation," Wat. Sci. & Technol., 7, pp. 95-100, 2007.
[10] F.J. Beltrán, I. Giráldez, and J.F. García-Araya, "Kinetics of activated carbon promoted ozonation of polyphenol mixtures in water," Ind. Eng. Chem. Res., 47, pp. 1058-1065, 2008.