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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 12 Issue 6 (2007) pp 381-383

Microscale Environmental Chemistry. Part 9: Removal of Metal Ions by Cementation

Jorge G. Ibanez, * Enrique Lopez-Mejia, Jose A. Echevarria-Eugui

Centro Mexicano de Quimica en Microescala. Depto. de Ing. y Ciencias Quimicas, Universidad Iberoamericana. Prol. Paseo Reforma 880, 01210 Mexico, D.F. Mexico,
Received April 10, 2006. Accepted June 3, 2007.

Published online: 30 November 2007

Abstract. An interesting scheme for the recovery of some metals from waste solutions is cementation, whereby spontaneous electrochemical activity takes place in the absence of an external power supply between a metal substrate, N and the ions of a more noble metal, M (i.e., a metal with a higher standard potential). We present here an experiment completely performed within a spectrophotometer cell, where Cu(II) is cemented onto a Zn pellet and the absorbance decrease is monitored at 810 nm. A first-order cementation kinetic plot is presented.

Key Words: Laboratories and Demonstrations; general chemistry; analytic chemistry; electrochemistry; inorganic chemistry

(*) Corresponding author. (E-mail:

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Issue date: December 1, 2007

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