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      Water Decontamination with Magnetic Particles by Adsorption and Chemical Degradation. Influence of the Manufacturing Parameters

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          Abstract

          Many different processes for manufacturing of magnetic particles are present in scientific literature. However, the large majority are not able to be applied to large-scale real operations. In this study, we present an experiment undertaken to determine advisable values and options for the main variables and factors for the application of the reverse co-precipitation method to produce magnetic particles for real environmental applications. In such, we have tried a conjugation of values/factors that has led to 12 main experiments and production of 12 different particles. After an initial study concerning their main characteristics, these 12 different particles were applied for the sorption removal of COD from real wastewater samples (efficiencies between 70% and 81%) and degradation of Methylene blue by Fenton reaction (degradation efficiencies up to 100%). The main conclusion from this work is that the best set of values depends on the target environmental application, and this set of values were determined for the two applications studied.

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          Magnetic nanoparticles: preparation, physical properties, and applications in biomedicine

          Mohammad Samiei, Abolfazl Akbarzadeh, Mohamad Samiei … (2012)
          Finally, we have addressed some relevant findings on the importance of having well-defined synthetic strategies developed for the generation of MNPs, with a focus on particle formation mechanism and recent modifications made on the preparation of monodisperse samples of relatively large quantities not only with similar physical features, but also with similar crystallochemical characteristics. Then, different methodologies for the functionalization of the prepared MNPs together with the characterization techniques are explained. Theorical views on the magnetism of nanoparticles are considered.
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            Magnetic nanoparticles and targeted drug delivering.

            Jana Chomoucka, Jana Drbohlavova, Dalibor Huska … (2010)
            Magnetic nanoparticles (MNPs) are being of great interest due to their unique purposes. Especially in medicine, application of MNPs is much promising. MNPs have been actively investigated as the next generation of targeted drug delivery for more than thirty years. The importance of targeted drug delivery and targeted drug therapy is to transport a drug directly to the centre of the disease under various conditions and thereby treat it deliberately, with no effects on the body. Usage of MNPs depends largely on the preparation processes to select optimal conditions and election agents to modify their surface. This review summarizes the most commonly used functionalization methods of the MNPs preparation methods and their use in targeted drug delivery and targeted therapy. Copyright 2010 Elsevier Ltd. All rights reserved.
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              Efficient removal of organic pollutants with magnetic Nanoscaled BiFeO(3) as a reusable heterogeneous fenton-like catalyst.

              Lihua Zhu, Wei Luo, Nan Wang … (2010)
              BiFeO(3) magnetic nanoparticles (BFO MNPs) were prepared with a sol-gel method and characterized as a catalyst. It was found that BFO MNPs effectively catalyzed the decomposition of H(2)O(2) into *OH radicals, being confirmed with electron spin resonance spin-trapping technique and other radical probing techniques. The strong H(2)O(2)-activating ability of BFO MNPs showed promising applications in the oxidative degradation of organic pollutants. When BFO MNPs were used as a heterogeneous Fenton-like catalyst to degrade Rhodamine B, the apparent rate constant for the RhB degradation at 25 degrees C at pH 5.0 in the BFO MNPs-H(2)O(2) system was evaluated to be 2.89 x 10(-2) min(-1), being about 20 folds of that obtained with Fe(3)O(4) MNPs as the catalyst under similar conditions. Moreover, BFO MNPs were demonstrated to have excellent stability and reusability. The catalytic mechanism of BFO MNPs was also investigated with Monte Carlo simulations and density functional theory calculations.
              Article 0 comments Cited 96 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Materials (Basel)
                Journal ID (iso-abbrev): Materials (Basel)
                Journal ID (publisher-id): materials
                Title: Materials
                Publisher: MDPI
                ISSN (Electronic): 1996-1944
                Publication date (Electronic): 12 May 2020
                Publication date Collection: May 2020
                Volume: 13
                Issue: 10
                Electronic Location Identifier: 2219
                Affiliations
                [1 ]Departamento de Ingeniería Química y Textil, Facultad de Ciencias Quimicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain; dmariavsp@ 123456gmail.com (D.V.); loherga@ 123456usal.es (L.H.); leticiamerchan@ 123456usal.es (L.M.); estevez@ 123456usal.es (A.M.E.)
                [2 ]LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; tcg@ 123456fe.up.pt (T.C.-G.); dbarbosa@ 123456fe.up.pt (D.B.)
                [3 ]Departamento de Geología, Facultad de Ciencias, Universidad de Salamanca, Pza. de Los Caídos s/n, 37008 Salamanca, Spain; jugb@ 123456usal.es
                [4 ]Servicio de Difracción de Rayos-X, Universidad de Salamanca, Pza. de Los Caídos s/n, 37008 Salamanca, Spain; jmcompana@ 123456usal.es
                Author notes
                [* ]Correspondence: pauloaugusto@ 123456usal.es
                Author information
                https://orcid.org/0000-0002-6707-9775
                Article
                Publisher ID: materials-13-02219
                DOI: 10.3390/ma13102219
                PMC ID: 7288294
                PubMed ID: 32408621
                SO-VID: 59182f04-36dc-462c-bc35-0cc70a6acf26
                Copyright © © 2020 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 07 April 2020
                Date accepted : 08 May 2020
                Categories
                Subject: Article

                Keywords: magnetic particles,synthesis,optimized values,large-scale operations,cod removal,wastewater treatment,colorant degradation,sorption,fenton reaction
                Data availability:
                Keywords: magnetic particles, synthesis, optimized values, large-scale operations, cod removal, wastewater treatment, colorant degradation, sorption, fenton reaction

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