Decomposition of diclofenac in sewage from municipal wastewater treatment plant using ionizing radiation
Affiliation:
1. Institute of Nuclear Chemistry and Technology , Dorodna 16 Str. , Warsaw , Poland
Abstract
Abstract
The decomposition of diclofenac (DCF) in sewage sludge from municipal wastewater treatment plant was investigated. It was found that adsorption of DCF on sludge is about 40%. Compared to previous studies, where the degradation yield in aqueous solution was 100%, in those experiments at the dose up to 5 kGy, only 50% of initial DCF concentration of 50 mg L−1 was decomposed in sediment and in solution over the sediment. The experiments were carried out using both gamma radiation and electron beam. It has been observed that DCF in the aqueous phase, above the sediment, was decomposed with the same efficiency using both gamma radiation and electron beam. Whereas for DCF in the sediment, a higher degradation efficiency was found when gamma radiation was applied. This is most likely due to the limited penetration depth of the electron beam into the sludge layer. It was shown that the applied peroxide addition (in a stoichiometric amount needed for complete mineralization of 50 mg L−1 DCF) did not cause increase in yield of DCF decomposition.
Publisher
Walter de Gruyter GmbH
Subject
Waste Management and Disposal,Condensed Matter Physics,Safety, Risk, Reliability and Quality,Instrumentation,Nuclear Energy and Engineering,Nuclear and High Energy Physics
Reference28 articles.
1. Acuna, V., Ginebreda, A., Mor, J. R., Petrovic, M., Sabater, S., Sumpter, J., & Barcelo, D. (2015). Balancing the health benefits and environmental risks of pharmaceuticals: diclofenac as an example. Environ. Int., 85, 327–333. doi.org/10.1016/j.envint.2015.09.023. 2. Yan, J., Zhang, X., Lin, W., Yang, W., & Ren, Y. (2019). Adsorption behavior of diclofenac-containing wastewater on three kinds of sewage sludge. Water Sci. Technol., 80, 717–726. doi.org/10.2166/wst.2019.315. 3. Joss, A., Keller, E., Alder, A. C., Göbel, A., McArdell, C. S., Ternes, T., & Siegrist, H. (2005). Removal of pharmaceuticals and fragrances in biological wastewater treatment. Water Res., 39, 3139–3152. doi.org/10.1016/j.watres.2005.05.031. 4. Quintana, J. B., Weiss, S., & Reemtsma, T. (2005). Pathway's and metabolites of microbial degradation of selected pharmaceutical and their occurrence in municipal wastewater treated by membrane bioreactor. Water Res., 39, 2654–2664. doi.org/10.1016/j.watres.2005.04.068. 5. Jallouli, N., Pastrana-Martinez, L. M., Ribeiro, A. R., Morelra, N. F. F., Faria, J. L., Hentati, O., Silva, A. M. T., & Ksibi, M. (2018). Heterogeneous photocatalytic degradation of ibuprofen in ultrapure water, municipal and pharmaceutical industry wastewater using TiO2/UV-LED system. Chem. Eng. J., 334, 976–984. doi.org/10.1016/j.cej.2017.10.045.
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