Environmentally friendly synthesized and magnetically recoverable designed ferrite photo-catalysts for wastewater treatment applications
Autor: | Libor Machala, Dionysios D. Dionysiou, Antonio Gascó, Pablo Campo, Changseok Han, Mallikarjuna N. Nadagouda, Daphne Hermosilla |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
inorganic chemicals
Environmental Engineering Decarboxylation Health Toxicology and Mutagenesis 0211 other engineering and technologies 02 engineering and technology Wastewater 010501 environmental sciences Ferric Compounds Waste Disposal Fluid 01 natural sciences Photo-fenton Catalysis chemistry.chemical_compound Ciprofloxacin Environmental Chemistry Ferrites Waste Management and Disposal 0105 earth and related environmental sciences 021110 strategic defence & security studies Chemistry Magnetic Phenomena Pollution Environmentally friendly Combinatorial chemistry Anti-Bacterial Agents Piperazine Carbamazepine Acridine Sunlight Sewage treatment Amine gas treating Advanced Oxidation Processes Water Pollutants Chemical |
Popis: | 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. |
Databáze: | OpenAIRE |
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