| Project/Area Number |
23651061
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Tohoku University |
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Principal Investigator |
KAMEDA Tomohito 東北大学, 工学(系)研究科(研究院), 准教授 (60333895)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 層状複水酸化物 / クロム / セレン / ヒ素 / 吸着 / 還元 / 鉄イオン / ドープ / インターカレーション / 六価クロム / 廃水処理 |
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| Research Abstract |
Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was prepared by dropwise addition of a mixed solution of MgCl2, FeCl2, and AlCl3 to NaOH solution at a constant pH. The Fe2+-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr2O72- with the intercalated Cl-, the production of Cr(OH)3, and the adsorption of Cr2O72- on the surface of the produced FeO(OH). Similarly, the Fe2+-doped LDH could take up As(V) and Se(VI) from an aqueous solution. The excellent performance of this LDH for the removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe2+ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and to obey pseudo-second order kinetics.
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