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2007
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January
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In the Laboratory
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Undergraduate Introductory Quantitative Chemistry Laboratory Course: Interdisciplinary Group Projects in Phytoremediation
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Debra L. Van Engelen
Department of Chemistry, University of Redlands, Redlands, CA 92373
Steven W. Suljak
Department of Chemistry, Santa Clara University, Santa Clara, CA 95053
J. Patrick Hall and Bert E. Holmes
Department of Chemistry, University of North Carolina at Asheville, Asheville, NC 28804
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January 2007
Vol. 84 No. 1
p. 128
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| Abstract |
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In this interdisciplinary laboratory course, groups of beginning students complete semester-long projects studying soil chemistry, plant uptake of metals, and environmental analysis while applying their knowledge to the research area of phytoremediation. Phytoremediation is the use of plants capable of accumulating pollutants to reduce levels in contaminated soils or water. In a series of short experiments, students learn methods for sample collection and preparation including collection of an aqueous runoff sample and digestion of soil and plants. Chemical analysis methods presented include the determination of soil pH, potentiometric titration of carbonates, determination of anions by ion chromatography, measurement of cation-exchange capacity of soil using an ammonium ion selective electrode, and trace-metal analysis using ion chromatography or atomic absorption spectrometry. Students begin reviews of scientific literature early in the course that are relevant to their projects, use computer software to statistically analyze data, write a formal group project report, and present their work to peers. By working to solve open-ended problems that are of current interest, students learn to think critically, become better problem solvers, experience a learning process that is more exciting and relevant, and are better prepared for an early and rewarding undergraduate research experience.
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| Supplement |
Notes for the instructor, including the survey questions and responses, detailed instructions for the students, and background information on the techniques are available.
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| More Information |
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Citation |
Van Engelen, Debra L.; Suljak, Steven W.; Hall, J. Patrick; Holmes, Bert E. J. Chem. Educ. 2007, 84, 128.
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Keywords |
Chromatography; Environmental Chemistry; Laboratory Instruction; Quantitative Analysis; Student-Centered Learning
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History |
Created:
Last Updated: |
12/5/2006
3/20/2007
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 Caution! | | Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations. |
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| Home > JCE Print > Journal of Chemical Education > Issues >
2007
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January
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128
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