1
|
García-Ballesteros S, García-Negueroles P, Amat AM, Arques A. Humic-Like Substances as Auxiliaries to Enhance Advanced Oxidation Processes. ACS OMEGA 2022; 7:3151-3157. [PMID: 35128227 PMCID: PMC8811936 DOI: 10.1021/acsomega.1c05445] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/21/2021] [Indexed: 05/24/2023]
Abstract
The application of humic-like substances (HLSs) in advanced oxidation processes for wastewater treatment is summarized in this work. HLSs share important characteristics with humic substances, and they can be isolated from different wastes using procedures that are related with their pH-dependent solubility. They are able to generate, upon irradiation, reactive species such as hydroxyl radicals and singlet oxygen or triplet excited states. Although photochemical removal of pollutants can be reached by HLSs, in general, irradiation times are very long. HLSs are good metal-complexing agents, and the Fe-HLS complex is able to participate in (photo)-Fenton-like processes at mild pH, preventing iron deactivation. Finally, novel hybrid materials with environmental applications have been synthesized using HLSs; in some cases, they also contain iron oxides, which allow a better separation but also the ability to drive heterogeneous (photo)-Fenton processes.
Collapse
|
2
|
Tummino ML, Nisticò R, Franzoso F, Bianco Prevot A, Calza P, Laurenti E, Paganini MC, Scalarone D, Magnacca G. The "Lab4treat" Outreach Experience: Preparation of Sustainable Magnetic Nanomaterials for Remediation of Model Wastewater. Molecules 2021; 26:3361. [PMID: 34199539 PMCID: PMC8199662 DOI: 10.3390/molecules26113361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/23/2021] [Accepted: 05/28/2021] [Indexed: 11/17/2022] Open
Abstract
The Lab4treat experience has been developed to demonstrate the use of magnetic materials in environmental applications. It was projected in the frame of the European project Mat4Treat, and it was tested several times in front of different audiences ranging from school students to the general public in training and/or divulgation events. The experience lends itself to discuss several aspects of actuality, physics and chemistry, which can be explained by modulating the discussion depth level, in order to meet the interests of younger or more experienced people and expand their knowledge. The topic is relevant, dealing with the recycling of urban waste and water depollution. The paper is placed within the field of water treatment for contaminant removal; therefore, a rich collection of recent (and less recent) papers dealing with magnetic materials and environmental issues is described in the Introduction section. In addition, the paper contains a detailed description of the experiment and a list of the possible topics which can be developed during the activity. The experimental approach makes the comprehension of scientific phenomena effective, and, from this perspective, the paper can be considered to be an example of interactive teaching.
Collapse
Affiliation(s)
- Maria Laura Tummino
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Roberto Nisticò
- Department of Applied Science and Technology DISAT, Polytechnic of Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Flavia Franzoso
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Alessandra Bianco Prevot
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Paola Calza
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Enzo Laurenti
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Maria Cristina Paganini
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Dominique Scalarone
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
| | - Giuliana Magnacca
- Department of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (F.F.); (A.B.P.); (P.C.); (E.L.); (M.C.P.); (D.S.)
- NIS Interdepartmental Centre, University of Torino, Via P. Giuria 7, 10125 Torino, Italy
| |
Collapse
|
3
|
Barcelos DA, Leitao DC, Pereira LCJ, Gonçalves MC. What Is Driving the Growth of Inorganic Glass in Smart Materials and Opto-Electronic Devices? MATERIALS (BASEL, SWITZERLAND) 2021; 14:2926. [PMID: 34072283 PMCID: PMC8198596 DOI: 10.3390/ma14112926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 02/06/2023]
Abstract
Inorganic glass is a transparent functional material and one of the few materials that keeps leading innovation. In the last decades, inorganic glass was integrated into opto-electronic devices such as optical fibers, semiconductors, solar cells, transparent photovoltaic devices, or photonic crystals and in smart materials applications such as environmental, pharmaceutical, and medical sensors, reinforcing its influence as an essential material and providing potential growth opportunities for the market. Moreover, inorganic glass is the only material that is 100% recyclable and can incorporate other industrial offscourings and/or residues to be used as raw materials. Over time, inorganic glass experienced an extensive range of fabrication techniques, from traditional melting-quenching (with an immense diversity of protocols) to chemical vapor deposition (CVD), physical vapor deposition (PVD), and wet chemistry routes as sol-gel and solvothermal processes. Additive manufacturing (AM) was recently added to the list. Bulks (3D), thin/thick films (2D), flexible glass (2D), powders (2D), fibers (1D), and nanoparticles (NPs) (0D) are examples of possible inorganic glass architectures able to integrate smart materials and opto-electronic devices, leading to added-value products in a wide range of markets. In this review, selected examples of inorganic glasses in areas such as: (i) magnetic glass materials, (ii) solar cells and transparent photovoltaic devices, (iii) photonic crystal, and (iv) smart materials are presented and discussed.
Collapse
Affiliation(s)
- Daniel Alves Barcelos
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- CQE, Centro de Química Estrutural, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Diana C. Leitao
- INESC Microsistemas e Nanotecnologias, R. Alves Redol 9, 1000-029 Lisboa, Portugal;
- Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Laura C. J. Pereira
- Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2685-066 Bobadela LRS, Portugal;
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2685-066 Bobadela LRS, Portugal
| | - Maria Clara Gonçalves
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- CQE, Centro de Química Estrutural, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| |
Collapse
|
4
|
Tummino ML, Nisticò R, Riedo C, Fabbri D, Cerruti M, Magnacca G. Waste Cleaning Waste: Combining Alginate with Biowaste-Derived Substances in Hydrogels and Films for Water Cleanup. Chemistry 2021; 27:660-668. [PMID: 32970361 DOI: 10.1002/chem.202003250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/03/2020] [Indexed: 11/10/2022]
Abstract
Biowaste-derived substances isolated from green compost (BBS-GC) are environmentally friendly reactants similar to humic substances, which contain multiple functionalities, that are suitable for adsorbing different kinds of pollutants in wastewater. Herein, sodium alginate (derived from brown algae) cross-linked with both Ca2+ ions and BBS-GC in the form of hydrogels and dried films are proposed as green, easy-to-form, and handleable materials for tertiary water treatments. The results show that both hydrogels and films are mechanically stable and can effectively remove differently charged dyes through an adsorption mechanism that can be described by the Freundlich model. BBS-GC-containing gels always performed better than samples prepared without BBS-GC, revealing that such unconventional materials can integrate waste valorization and water decontamination, potentially providing social and environmental benefits.
Collapse
Affiliation(s)
- Maria Laura Tummino
- Department of Chemistry, Università degli Studi di Torino, Via P. Giuria 7, 10125, Turin, Italy
- Current address: Institute of Intelligent Industrial Technologies and Systems, for Advanced Manifacturing-Italian National Research Council, Corso Giuseppe Pella 16, 13800, Biella, Italy
| | - Roberto Nisticò
- Independent Researcher, via Borgomasino 39, 10149, Turin, Italy
| | - Chiara Riedo
- Department of Chemistry, Università degli Studi di Torino, Via P. Giuria 7, 10125, Turin, Italy
| | - Debora Fabbri
- Department of Chemistry, Università degli Studi di Torino, Via P. Giuria 7, 10125, Turin, Italy
| | - Marta Cerruti
- Department of Mining and Materials Engineering, McGill University, Montreal, QC, H3A 2B2, Canada
| | - Giuliana Magnacca
- Department of Chemistry, Università degli Studi di Torino, Via P. Giuria 7, 10125, Turin, Italy
- NIS Centre, Via P. Giuria 7, 10125, Turin, Italy
| |
Collapse
|
5
|
Magnetic Materials and Systems: Domain Structure Visualization and Other Characterization Techniques for the Application in the Materials Science and Biomedicine. INORGANICS 2020. [DOI: 10.3390/inorganics8010006] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Magnetic structures have attracted a great interest due to their multiple applications, from physics to biomedicine. Several techniques are currently employed to investigate magnetic characteristics and other physicochemical properties of magnetic structures. The major objective of this review is to summarize the current knowledge on the usage, advances, advantages, and disadvantages of a large number of techniques that are currently available to characterize magnetic systems. The present review, aiming at helping in the choice of the most suitable method as appropriate, is divided into three sections dedicated to characterization techniques. Firstly, the magnetism and magnetization (hysteresis) techniques are introduced. Secondly, the visualization methods of the domain structures by means of different probes are illustrated. Lastly, the characterization of magnetic nanosystems in view of possible biomedical applications is discussed, including the exploitation of magnetism in imaging for cell tracking/visualization of pathological alterations in living systems (mainly by magnetic resonance imaging, MRI).
Collapse
|
6
|
Tummino ML, Magnacca G, Cimino D, Laurenti E, Nisticò R. The Innovation Comes from the Sea: Chitosan and Alginate Hybrid Gels and Films as Sustainable Materials for Wastewater Remediation. Int J Mol Sci 2020; 21:E550. [PMID: 31952241 PMCID: PMC7013933 DOI: 10.3390/ijms21020550] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 12/25/2022] Open
Abstract
The growing utilization of renewable and residual biomasses for environmental preservation and remediation are important goals to be pursued to minimize the environmental impact of human activities. In this paper, sodium alginate (derived from brown algae) was crosslinked using chitosan (mainly derived from the exoskeleton of crustaceans) in the presence of biowaste-derived substances isolated from green compost (BBS-GC), to produce hydrogels and dried films. The obtained materials were tested as adsorbents for wastewater remediation. To this purpose, gels were characterized using a multi-analytical approach and used as active substrates for the removal of three differently-charged molecules, chosen as model pollutants: crystal violet, rhodamine B, and orange II. The effectiveness of the gel formulations was demonstrated and attributed to the variety of active functionalities introduced by the different precursors, the structural factors and the peculiar physicochemical properties of the resulting materials.
Collapse
Affiliation(s)
- Maria Laura Tummino
- Department of Chemistry, Università degli studi di Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (G.M.); (D.C.); (E.L.)
| | - Giuliana Magnacca
- Department of Chemistry, Università degli studi di Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (G.M.); (D.C.); (E.L.)
- NIS Centre, Università degli studi di Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Dafne Cimino
- Department of Chemistry, Università degli studi di Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (G.M.); (D.C.); (E.L.)
- Department of Environmental Sciences, Informatics and Statistics, Università Ca’ Foscari di Venezia, Via Torino 155, 30172 Venezia-Mestre, Italy
| | - Enzo Laurenti
- Department of Chemistry, Università degli studi di Torino, Via P. Giuria 7, 10125 Torino, Italy; (M.L.T.); (G.M.); (D.C.); (E.L.)
| | - Roberto Nisticò
- Department of Applied Science and Technology DISAT, Polytechnic of Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
| |
Collapse
|
7
|
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:ma12233942. [PMID: 31795189 PMCID: PMC6926715 DOI: 10.3390/ma12233942] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 11/22/2019] [Accepted: 11/25/2019] [Indexed: 11/16/2022]
Abstract
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.
Collapse
Affiliation(s)
- Paola Calza
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, Italy (G.M.); (E.L.)
- Correspondence: (P.C.); (A.B.P.); Tel.: +39-011-670-5268 (P.C.); +39-011-670-5292 (A.B.P.)
| | - Jessica Di Sarro
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, Italy (G.M.); (E.L.)
| | - Giuliana Magnacca
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, Italy (G.M.); (E.L.)
- 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
| | - Alessandra Bianco Prevot
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, Italy (G.M.); (E.L.)
- Correspondence: (P.C.); (A.B.P.); Tel.: +39-011-670-5268 (P.C.); +39-011-670-5292 (A.B.P.)
| | - Enzo Laurenti
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, Italy (G.M.); (E.L.)
| |
Collapse
|
8
|
Sustainable Magnetic Materials (from Chitosan and Municipal Biowaste) for the Removal of Diclofenac from Water. NANOMATERIALS 2019; 9:nano9081091. [PMID: 31366049 PMCID: PMC6722719 DOI: 10.3390/nano9081091] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 11/19/2022]
Abstract
The photodegradation of an aqueous solution of diclofenac (DCF) has been attempted in the presence of hydrogen peroxide and organic/inorganic hybrid magnetic materials under simulated and real solar light. The hybrid magnetic materials have been prepared via coprecipitation synthesis starting from iron(II) and iron(III) inorganic salts in the presence of bioderived organic products (i.e., chitosan or bio-based substances isolated from commercially available composted urban biowastes) acting as stabilizers of the iron-containing phase. In addition to the as prepared hybrid materials, the corresponding materials obtained after a pyrolytic step at low temperature (550 °C) have been tested. The obtained results evidenced the capability of the materials to activate hydrogen peroxide at mild pH promoting DCF (photo) degradation. All the materials feature also as adsorbents since a decrease of DCF is observed also when working in the dark and in the absence of hydrogen peroxide.
Collapse
|
9
|
Different approaches for the solar photocatalytic removal of micro-contaminants from aqueous environment: Titania vs. hybrid magnetic iron oxides. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.01.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
10
|
Nisticò R, Rivolo P, Giorgis F. Tips and Tricks for the Surface Engineering of Well-Ordered Morphologically Driven Silver-Based Nanomaterials. ChemistryOpen 2019; 8:508-519. [PMID: 31061776 PMCID: PMC6488201 DOI: 10.1002/open.201900007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/10/2019] [Indexed: 11/30/2022] Open
Abstract
Particularly-shaped silver nanostructures are successfully applied in many scientific fields, such as nanotechnology, catalysis, (nano)engineering, optoelectronics, and sensing. In recent years, the production of shape-controlled silver-based nanostructures and the knowledge around this topic has grown significantly. Hence, on the basis of the most recent results reported in the literature, a critical analysis around the driving forces behind the synthesis of such nanostructures are proposed herein, pointing out the important role of surface-regulating agents in driving crystalline growth by favoring (or opposing) development along specific directions. Additionally, growth mechanisms of the different morphologies considered here are discussed in depth, and critical points highlighted.
Collapse
Affiliation(s)
- Roberto Nisticò
- Department of Applied Science and Technology DISATPolytechnic of TorinoC.so Duca degli Abruzzi 2410129TorinoItaly
| | - Paola Rivolo
- Department of Applied Science and Technology DISATPolytechnic of TorinoC.so Duca degli Abruzzi 2410129TorinoItaly
| | - Fabrizio Giorgis
- Department of Applied Science and Technology DISATPolytechnic of TorinoC.so Duca degli Abruzzi 2410129TorinoItaly
| |
Collapse
|
11
|
Nisticò R. Block copolymers for designing nanostructured porous coatings. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:2332-2344. [PMID: 30202702 PMCID: PMC6122062 DOI: 10.3762/bjnano.9.218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Highly ordered porous coatings find applications in many fields, such as nanotechnology, microfluidics and nanofluidics, membrane separation, and sensing. In recent years, there has been great interest regarding the synthesis of isoporous and well-ordered (in)organic coatings for the production of highly selective functional membranes. Among the different strategies that have been proposed to date for preparing these porous thin coatings, one simple route involves the use of self-assembled amphiphilic block copolymers either as the porogen (acting as sacrificial templating agents for the production of inorganic architectures) or as a source of the porogen (by self-assembly for the production of polymeric substrates). Therefore, an extended discussion around the exploitation of block copolymers is proposed here in this review, using polystyrene-block-polyethylene oxide (PS-b-PEO) as the model substrate, and critical points are highlighted.
Collapse
Affiliation(s)
- Roberto Nisticò
- Department of Applied Science and Technology DISAT, Polytechnic of Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
| |
Collapse
|
12
|
Palma D, Bianco Prevot A, Brigante M, Fabbri D, Magnacca G, Richard C, Mailhot G, Nisticò R. New Insights on the Photodegradation of Caffeine in the Presence of Bio-Based Substances-Magnetic Iron Oxide Hybrid Nanomaterials. MATERIALS 2018; 11:ma11071084. [PMID: 29949864 PMCID: PMC6073507 DOI: 10.3390/ma11071084] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/19/2018] [Accepted: 06/22/2018] [Indexed: 01/19/2023]
Abstract
The exploitation of organic waste as a source of bio-based substances to be used in environmental applications is gaining increasing interest. In the present research, compost-derived bio-based substances (BBS-Cs) were used to prepare hybrid magnetic nanoparticles (HMNPs) to be tested as an auxiliary in advanced oxidation processes. Hybrid magnetic nanoparticles can be indeed recovered at the end of the treatment and re-used in further water purification cycles. The research aimed to give new insights on the photodegradation of caffeine, chosen as marker of anthropogenic pollution in natural waters, and representative of the contaminants of emerging concern (CECs). Hybrid magnetic nanoparticles were synthetized starting from Fe(II) and Fe(III) salts and BBS-C aqueous solution, in alkali medium, via co-precipitation. Hybrid magnetic nanoparticles were characterized via X-ray diffraction (XRD), thermo-gravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. The effect of pH, added hydrogen peroxide, and dissolved oxygen on caffeine photodegradation in the presence of HMNPs was assessed. The results allow for the hypothesis that caffeine abatement can be obtained in the presence of HMNPs and hydrogen peroxide through a heterogeneous photo-Fenton mechanism. The role of hydroxyl radicals in the process was assessed examining the effect of a selective hydroxyl radical scavenger on the caffeine degradation kinetic.
Collapse
Affiliation(s)
- Davide Palma
- Department of Chemistry, University of Torino, via P. Giuria 7, 10125 Torino, Italy.
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | | | - Marcello Brigante
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | - Debora Fabbri
- Department of Chemistry, University of Torino, via P. Giuria 7, 10125 Torino, Italy.
| | - Giuliana Magnacca
- Department of Chemistry, University of Torino, via P. Giuria 7, 10125 Torino, Italy.
- NIS (Nanostructured Interfaces and Surfaces) Centre, Via P. Giuria 7, 10125 Torino, Italy.
| | - Claire Richard
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | - Gilles Mailhot
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.
| | - Roberto Nisticò
- Polytechnic of Torino, Department of Applied Science and Technology DISAT, C.so Duca Degli Abruzzi 24, 10129 Torino, Italy.
| |
Collapse
|