Mechanism and control of scorodite formation for arsenic stabilization
| Project/Area Number |
20560694
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
HIDEYUKI Itou Kyushu Institute of Technology, 大学院・工学研究院, 助教 (90213074)
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| Co-Investigator(Kenkyū-buntansha) |
TOMIO Takasu 九州工業大学, 大学院・工学研究院, 准教授 (20264129)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | ヒ素 / スコロダイト / 固定化 / 非晶質 / 結晶化 |
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| Research Abstract |
Copper is one of important base metals. On the other hand, the concentrations of impurities in ores are increasing due to the decrease in the natural resources. In particular, arsenic becomes the problem. The technology to immobilize the arsenic after separation is required to store the arsenic safely and economically. The purpose of this study was to elucidate the formation mechanism of the scorodite which was an stable arsenic compound. It was made clear that, depending on conditions, amorphous ferric arsenate was once formed on a seed crystal in water solutions but crystallized with progress of the retention time. It was also found that crystallization of the amorphous into scorodite occurs even in gas atmospheres.
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Report
(4 results)
Research Products
(5 results)
