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2004
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February
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In the Laboratory
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Magnetic Particle Technology. A Simple Preparation of Magnetic Composites for the Adsorption of Water Contaminants
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Luiz C.A. Oliveira, Rachel V.R.A. Rios, José D. Fabris, and Rochel M. Lago
Departamento de Química, ICEx, UFMG, 31270-901 Belo Horizonte, MG, Brazil
Karim Sapag
Laboratorio de Ciencias de Superficies y Medios Porosos, Universidad Nacional de San Luis, 5700 San Luis, Argentina
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February 2004
Vol. 81 No. 2
p. 248
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| Abstract |
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In this article a simple undergraduate laboratory experiment to produce magnetic adsorbents is described. These magnetic materials efficiently adsorb contaminants from water and can be easily removed from the medium by a simple magnetic separation process. The magnetic composites can be prepared by a simple procedure based on the precipitation of magnetic iron oxides from Fe2+ and Fe3+ salts and NaOH on activated carbon or clay (two excellent adsorbents). The prepared materials can be used in various experiments such as: Harvesting the Magnetic Composite, Oil Spill Remediation, Adsorption of Metal Ions Contaminants onto Clay Composites, and Adsorption of Organic Contaminants onto Activated Carbon Composites. All these experiments illustrate several important general aspects in chemistry such as material science (clays, activated carbon, iron oxides, and magnetic materials), adsorption processes (adsorption isotherms, surface area, cation exchange, adsorption of organics, and metal ions), and environmental technology.
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| Supplement |
Instructions for the students, notes for the instructor, CAS registry numbers, time required for each experimental step, general information on magnetic particle technology, clays, and activated carbon, and detailed characterization of the composite materials are available.
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 Contents |
JCE2004p0248W.doc (Microsoft Word)
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| More Information |
Citation |
Oliveira, Luiz C.A.; Rios, Rachel V.R.A.; Fabris, José D.; Lago, Rochel M.; Sapag, Karim. J. Chem. Educ. 2004 81 248.
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Keywords |
Clays / Clay Chemistry; Demonstrations; Environmental Chemistry; General Chemistry; Green Chemistry; Introductory / High School Chemistry; Laboratory Instruction; Magnetic Properties; Materials Science; Separation Science
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History |
Created:
Last Updated: |
January 5, 2004
February 25, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
2004
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February
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248
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