| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Asbestos fibers decomposed more than 99.9 % by treating asbestos fibers with a solution prepared from sulfur and calcium hydroxide at 150°C and 0.6Mpa. In order to elucidate the mechanism oxidation state of sulfur compounds was determined by an X-ray absorption near edge structure spectrum (XANES) method. The oxidation state of sulfur gradually changed from -2 to 0, +2, +4 and +6 that depended on the treating time. The ionic radius of sulfur grows big with the oxidation. The results suggest that the sulfur compounds intercalated in asbestos fiber expand the crystal gap, leading to the decomposition of asbestos fiber under continuous mixing.
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