Études des propriétés adsorbantes des fibres d'amiante modifiées et de fibres proposées comme substitut à l'amiante par chromatographie en phase gazeuse

Abstract

A study, by vapor phase chromatography, of the adsorption isotherms of benzene on raw and modified asbestos fibers as well as on fibers proposed as substitutes for asbestos shows that there is a marked difference in the behaviour of the various fibers examined. A comparison of the adsorbing power of raw and phosphorylated asbestos fibers, as well as asbestos fibers heated to 700 °C, has been made regarding their behaviour toward solutes bearing various functional groups, and it has shown the existence of physical adsorption as well as chemisorption. The presence of hydroxyl groups in the surface of the asbestos fibers favors the adsorption of organic molecules through hydrogen bonding. [Journal translation]