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ERIC Number: EJ913226
Record Type: Journal
Publication Date: 2010-Feb
Pages: 3
Abstractor: As Provided
Reference Count: 6
ISSN: ISSN-0021-9584
Potentiometric Demonstration of Metal Biosorption by Nonliving Plants
Velazquez-Jimenez, Litza Halla; Torres-Rodriguez, Luz Maria; Garcia-de la Cruz, Ramon Fernando; Montes-Rojas, Antonio; Lopez-Arteaga, Rafael Eduardo
Journal of Chemical Education, v87 n2 p183-185 Feb 2010
An electrochemical experiment is presented to illustrate biosorption to second-year and upper-division undergraduate students. The extraction of Cd[superscript 2+], Pb[superscript 2+], and Cu[superscript 2+] by nonliving "Typha latifolia" (cattail) roots can be monitored in real time by potentiometry determinations. The open circuit potential (OCP) for the metal in equilibrium with its ion is measured before, during, and after plant addition to a solution. Decrease in OCP indicates a reduction in the metal concentration in solution because of the metal uptake by the plant. The quantity of metal accumulated in the plant and the variation in the OCP can be calculated from the Nernst equation. This experiment is simple and pedagogical. (Contains 1 figure.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A