| Project/Area Number |
20550142
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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 |
Environmental chemistry
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
IYI Nobuo National Institute for Materials Science, ナノスケール物質萌芽ラボ, 主席研究員 (50343851)
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| Co-Investigator(Kenkyū-buntansha) |
SASAI Ryo 島根大学, 総合理工学部・物質化学科, 准教授 (60314051)
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| Co-Investigator(Renkei-kenkyūsha) |
ITAKURA Takeshi 名古屋大学, エコトピア科学研究所, 助教 (20402498)
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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 |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | LDH / 脱炭酸 / アニオン交換 / 水熱鉱化 / 排水処理 / 層状複水酸化物 / 鉱化剤 / アニオン交換材料 / 脱炭酸イオン / レアメタル回収 / 流通処理 |
|---|
| Research Abstract |
To establish water-purifying system, we examined the process for absorption/desorption of hazardous anions in waste water by using LDHs (layered double hydroxides) and the process to isolate the desorbed anions by mineralization. The results are : (1) Decarbonation of carbonate-type LDH is important process for using the LDH as reusable absorbents. Decarbonation of carbonate-type LDHs was successfully conducted by using mixed solutions of NaCl-acetate buffer. Adsorption/desorption cycle for water purification using LDH was demonstrated. (2) Hazardous anions were recovered from waste water by hydrothermal treatment by using calcium hydroxide, Ca(OH)_2, as the mineralization reagent. It was also found that CaCl_2 can be used for mineralization by adjusting the pH of the waste water.
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