Local strucuture analysis of Cr(VI) ion dispersed in compound phases of Cr-containing slag
| Project/Area Number |
26420755
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Metal making/Resorce production engineering
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
田中 敏宏 大阪大学, 工学研究科, 教授 (10179773)
岡島 敏浩 公益財団法人佐賀県地域産業支援センター九州シンクロトロン光研究センター, ビームライングループ, 主任研究員 (20450950)
梅咲 則正 大阪大学, 工学研究科, 特任研究員 (70127190)
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| Co-Investigator(Renkei-kenkyūsha) |
MIZOGUCHI Teruyasu 東京大学, 生産技術研究所, 准教授 (70422334)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 六価クロム / X線吸収微細構造 / 第一原理計算 / スラグ / リサイクル・循環・再利用・変換 / X線吸収端微細構造 |
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| Outline of Final Research Achievements |
To clarify the formation mechanism of Cr(VI) ion in Cr-containing slag, we investigated local structure of Cr ion dispersed in dicalcium silicate (2CaO.SiO2), Merwinite (3CaO.MgO.2SiO2) and Melilite (2CaO.Al2O3.SiO2), which are recognized as main compound phases composing Cr-containing slag. Our study including X-ray absorption analyses of these Cr-bearing compounds and first-principle simulations revealed that, (1) high-valence Cr ions including Cr(VI) are dispersed in dicalcium silicate when annealed in air atmosphere, (2) although Merwinite accepts Cr ion dispersion mainly as Cr(III), small amount of high-valence Cr ions are also detected, (3) Melilite accepts Cr ion dispersion only as Cr(III) if annealed in air atmosphere.
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Report
(4 results)
Research Products
(3 results)
