温石綿の加熱処理による2, 3の性状の変化
1985 年 25 巻 4 号 p. 148-152
詳細
1985 年 25 巻 4 号 p. 148-152
Adsorption properties of thermal-treated chrysotile asbestos were studied by measuring the specific surface area, the adsorpabilities for water and coloring matters (Methylene Blue and Acid Red 88), and the uptakabilities for some metal ions (Cu2+, Co2+, and Ni2+) in a batch system with each aqueous solution in addition to differential thermal analysis (DTA), thermogravimetry (TG), and X-ray powder diffraction (XRD) examination.
The layer structure of chrysotile used collapsed at 500°C and was transformed to forsterite above 600°C. The material heated at 600°C yielded the maximum specific surface area and increased the adsorpability for Methylene Blue, whereas decreased for Acid Red 88. The materials heated at 500°C and 600°C exhibitid considerably great uptakabilities for metal ions because of the appearance of active MgO sites on the chrysotile surface by the thermal treatments. In particular, the thermal-treated chrysotile asbestos seems to exhibit a significant power for the removal of Co2+ from aqueous solutions.
