| Autor: |
Gorski, C. H., Stettler, L. E. |
| Zdroj: |
American Industrial Hygiene Association Journal; June 1974, Vol. 35 Issue: 6 p345-353, 9p |
| Abstrakt: |
Nitrogen and argon isotherms were determined on amosite and on chrysotile asbestos at -183° and -195°C, and in three states of subdivision. BET surface area determinations showed that milling increased the amosite surface area from 1.3 to 11.0 m2/g, and the chrysotile from 15.3 to 48.4 m2/g. Changes in hysteresis of the adsorption isotherms indicated that the increased surface area after milling was mostly external for amosite and the increase for chrysotile was primarily caused by the greater availability of micropores. Measurements of pore size showed averages of 58.5 Å for amosite and 80.5 Å for chrysotile. Heat of adsorption determinations, calculated from the Clausius-Clapeyron equation, showed only minor differences between the two minerals. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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