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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

J. Chem. Educ., 2004, 81 (2), p 248

DOI: 10.1021/ed081p248

Publication Date (Web): February 1, 2004

Section:

History, Education, and Documentation

Abstract

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.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Demonstrations

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Green Chemistry

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

A Simple Adsorption Experiment
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Journal of Chemical Education2011 88 (5), 624-628
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  Journal of Chemical Education2011 88 (5), 624-628
  The study of adsorption phenomenon is one of the most relevant and traditional physical chemistry experiments performed by chemistry undergraduate students in laboratory courses. In this article, we describe an easy, inexpensive, and straightforward way ...
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Integrating Green Chemistry into the Introductory Chemistry Curriculum
Marc A. Klingshirn and Gary O. Spessard
2009 1011 (), 79-92
- Integrating Green Chemistry into the Introductory Chemistry Curriculum
  Marc A. Klingshirn and Gary O. Spessard
  2009 1011 (), 79-92
  Green chemistry education offers a solution to our current environmental problems because it provides the opportunity to train future scientists and political leaders, thus helping move us toward a more sustainable society. Green chemistry, while becoming ...
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