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Environmentally friendly synthesized and magnetically recoverable designed ferrite photo-catalysts for wastewater treatment applications

D. Hermosilla, C. Han, MN. Nadagouda, L. Machala, A. Gascó, P. Campo, DD. Dionysiou,

. 2020 ; 381 (-) : 121200. [pub] 20190910

Language English Country Netherlands

Document type Journal Article, Research Support, Non-U.S. Gov't

Persistent link   https://www.medvik.cz/link/bmc20028617

Fenton processes are promising wastewater treatment alternatives for bio-recalcitrant compounds. Three different methods (i.e., reverse microemulsion, sol-gel, and combustion) were designed to synthesize environmentally friendly ferrites as magnetically recoverable catalysts to be applied for the decomposition of two pharmaceuticals (ciprofloxacin and carbamazepine) that are frequently detected in water bodies. The catalysts were used in a heterogeneous solar photo-Fenton treatment to save the cost of applying high-energy UV radiation sources, and was performed under a slightly basic pH to avoid metal leaching and adding salts for pH adjustment. All the developed catalysts resulted in the effective treatment of ciprofloxacin and carbamazepine in both synthetic and real domestic wastewater. In particular, the sol-gel synthesized ferrite was more magnetic and more suitable for reuse. The degradation pathways of both compounds were elucidated for this treatment. The degradation of ciprofloxacin involved attacks to the quinolone and piperazine rings. The degradation pathway of carbamazepine involved the formation of hydroxyl carbamazepine and dihydroxy carbamazepine before yielding acridine by hydrogen abstraction, decarboxylation, and amine cleavage, which would be further oxidized.

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$a Hermosilla, Daphne $u Department of Agricultural and Forest Engineering, University of Valladolid, EIFAB, Campus Duques de Soria, 42004, Soria, Spain. Electronic address: daphne.hermosilla@uva.es.
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$a Han, Changseok $u Department of Environmental Engineering, INHA University, Incheon, 22212, South Korea.
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$a Nadagouda, Mallikarjuna N $u Center for Nanoscale Multifunctional Materials, Mechanical & Material Engineering, Wright State University, Dayton, OH, 45431, USA.
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$a Machala, Libor $u Regional Centre of Advanced Technologies and Materials, Department of Experimental Physics, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71, Olomouc, Czech Republic.
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$a Gascó, Antonio $u Department of Agricultural and Forest Sciences, University of Valladolid, EIFAB, Campus Duques de Soria, 42004, Soria, Spain.
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$a Campo, Pablo $u Cranfield Water Science Institute, Cranfield University, Cranfield, MK43 0AL, UK.
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$a Dionysiou, Dionysios D $u Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221-0012, USA.
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