Taking Advantage of a Corrosion Problem To Solve a Pollution Problem

Some simple chemistry is used to demonstrate how Fe(II) ions, formed during iron corrosion in acid aqueous solution, can reduce toxic Cr(VI) species, forming soluble Cr(III) and Fe(III) ions. These ions, in turn, can be precipitated by neutralizing the solution. The procedure provides a treatment fo...

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Bibliographic Details
Published in:Journal of chemical education 2011-08, Vol.88 (8), p.1109-1111
Main Authors: Palomar-Ramírez, Carlos F, Bazán-Martínez, José A, Palomar-Pardavé, Manuel E, Romero-Romo, Mario A, Ramírez-Silva, María Teresa
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemical precipitation
Chemistry
Chromium
College Science
Conservation (Environment)
Corrosion
Corrosion mechanisms
Environmental Standards
Hazardous Materials
Industrial wastewater
Ions
Iron
Molecular Structure
Organic chemistry
Pollution
Problem Solving
Science Instruction
Wastewater treatment
Water treatment
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Summary:Some simple chemistry is used to demonstrate how Fe(II) ions, formed during iron corrosion in acid aqueous solution, can reduce toxic Cr(VI) species, forming soluble Cr(III) and Fe(III) ions. These ions, in turn, can be precipitated by neutralizing the solution. The procedure provides a treatment for industrial wastewaters commonly found in plating industries that allows its reuse or safe discharge compliant with environmental standards.
ISSN:0021-9584
1938-1328
DOI:10.1021/ed9000365