Invited review paper

Chemisorption of organic dyes on chrysotile asbestos and the toxicity issue

F. Habashi

Department of Mining, Metallurgical, and Materials Engineering, Laval University,
Quebec City, Canada G1K 7P4

Received 23 March 2001; accepted 2 May 2001


Asbestos, an extremely useful natural resource, has been studied extensively mineralogically and for industrial application. Its extraction from ores has been greatly improved with respect to safety in the work place. In spite of that, there is a decisive effort in many countries to ban its use on the grounds that it is a toxic substance. This action resulting in drastic decrease in production and the possibility of destroying the industry. The chelation of asbestos with organic dyes seems to be a promising way to abate its toxicity. Dyeing can be done when the fibers are slurred in water at ambient conditions in the same way as textile fibers.

Keywords: Chemisorption; organic dyes; chrysotile asbestos

E-mail : Fathi.Habashi@gmn.ulaval.ca