2007 Fiscal Year Final Research Report Summary
Research on Recycling and Resouae Recovery of Solid Wastes by Hydrothermal Nano-Process
| Project/Area Number |
18201012
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Nagoya University |
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Principal Investigator |
ITOH Hideaki Nagoya University, EcoTopia Science Institute, Emeritus Professor (60109270)
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| Co-Investigator(Kenkyū-buntansha) |
SASAI Ryo Nagoya Univ, Graduate School of Eng, Associate Professor (60314051)
ITAKURA Takeshi Nagoya Univ, EcoTbpia Science Institute, Research Assistant (20402498)
YOSHIDA Hisao Nagoya Univ, Graduate Schcol of Eng, Associate Professor (80273267)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Hydrothermal Nano-Process / Resource Recovery / Inorganic Solid Materials / Inorganic Wastewater / Hydrothermal Oxidation / Hydrothermal Mineralization |
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| Research Abstract |
Today, the resource depletion is one of the important issues of all over the world. In order to solve this issue, the higher-efficiency techniques for resource recovery from various solid wastes such as ceramics would be required. However, there are no techniques for recovering the variable resources from solid wastes, especially, ceramics, because most ceramics have relatively high stability for heat, mechanical stress and so on. In this research, we investigated on the development of the higher-efficiency techniques for valuable resource from ceramics such as cemented carbides, zirconia and magnet by the hydrothermal nano-process. To show that hydrothermal nano-process technique we proposed is one of key-technologies for solving the resource recovery issues, we investigated the following topics :
1.Hydrothermal mechanochemical nano-process
2.Hydrothermal oxidation nano-process
3.Hydrothermal mineralization nano-process
As a result of this research, we succeeded in recovering valuable res
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ources from the following wastes :
1.WO_3 powder and aqueous solution with Co ions were separated from WC-Co cemented carbide cutting tools by the hydrothermal oxidation treatment with acid aqueous solution.
2.Zrconia powder for sintering with yttrium was recovered from spent partially stabilized zirconia sintered compact by the hydrothermal and mechanochemical treatment.
3.Ferrite particles consisted of Fe and Mn could be recovered from spent toner carrier powder by the hydrothermal oxidation treatment with H_2O_2.
4.Neodymium oxalate was recovered from spent Nd-Fe-B permanent sintered magnet by the hydrothermal oxidation treatment with HC1 and oxalic acid.
5.Co-A1 composite-oxide could be recovered from spent cathode of the Li-secondary battery by the hydrothermal oxidation treatment.
6.Natural minerals could be recovered from wastewaters with various oxo-anions such as boron, fluorine, arsenic, etc. by the hydrothermal mineralization treatment with mineralizer such as hydrated lime and calcium chloride. Less
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[Journal Article] 使用済み電子写真用トナーキャリアの水熱処理による再生2007
Author(s)
Sasai, R., Saitoh, T., Hayashi, H., Hazama, M., Kishimoto, S., Itoh, H
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Journal Title
Journal of Ceramics Society of Japan 115
Pages: 222-226
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Resource Recovery from Advanced Ceramics by Hydrothermal Treatment2006
Author(s)
Sasai, R., Shimizu, T., Inagaki, F., Miyanaga, H., Itakura, T., Kamiya, M., Kojima, T., Itoh, H
Organizer
Asian Young Ceramist Conference on Tokai (AYCeCT)
Place of Presentation
Ogaki, Japan
Year and Date
20061026-28
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Decomposition and Detoxification of DXNs Adsorbed on Various Solid Wastes by Microwave Plasma Treatment2006
Author(s)
Sasai, R., Jin-no, M., Satoh, A., Imai, Y., Itoh, H
Organizer
3rd International Conference on Waste Management and the Environment (Waste Management 2006)
Place of Presentation
Malta, Malta
Year and Date
20060621-23
Description
「研究成果報告書概要(欧文)」より
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