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Open AccessFeature PaperArticle

Use of Low-Cost Magnetic Materials Containing Waste Derivatives for the (Photo)-Fenton Removal of Organic Pollutants

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Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, Italy
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Nanostructured Interfaces and Surfaces (NIS) and National Interuniversity Consortium of Materials Science and Technology (INSTM) Reference Centre, Via P. Giuria 7, I-10125 Torino, Italy
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(23), 3942; https://doi.org/10.3390/ma12233942
Received: 2 November 2019 / Revised: 22 November 2019 / Accepted: 25 November 2019 / Published: 28 November 2019
Hybrid magnetite/maghemite nanoparticles (MNP) coated with waste-sourced bio-based substances (BBS) were synthesized and studied for the degradation of phenol, chosen as a model pollutant, in water. A systematic study was undertaken in order to rationalize MNP–BBS behavior and optimize their performance. The effect of experimental parameters, such as light irradiation, addition of hydrogen peroxide, and the ratio between hydrogen peroxide and MNP–BBS concentrations, was studied. The generation of hydroxyl radicals was assessed, and the recovery and re-cycle of the material was investigated. Our results indicate that phenol degradation could be attained by both Fenton and photo-Fenton processes, with higher efficiency in dark condition and in the presence of a suitable amount of hydrogen peroxide. Evidence was obtained for the roles of iron ions leached from the materials as well as of organic matter released in the solution upon partial photodegradation of the organic coating. The reusability tests indicated a lower but still valid performance of the material. Optimization of the experimental conditions was performed to achieve the highest efficiency in substrate degradation, and fundamental insights into the mechanism of the MNP–BBS Fenton-like reaction were obtained. View Full-Text
Keywords: magnetic nanoparticles; urban waste; Fenton; pollutants; magnetite; coprecipitation synthesis magnetic nanoparticles; urban waste; Fenton; pollutants; magnetite; coprecipitation synthesis
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MDPI and ACS Style

Calza, P.; Di Sarro, J.; Magnacca, G.; Bianco Prevot, A.; Laurenti, E. Use of Low-Cost Magnetic Materials Containing Waste Derivatives for the (Photo)-Fenton Removal of Organic Pollutants. Materials 2019, 12, 3942.

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