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Preparation of Fe3O4 Nanoparticles and Their Application to Composite Biosorbent
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- ZHAO Jie
- Materials Science and Engineering, Graduate School of Science and Engineering, Yamagata University Department of Applied Chemistry, Northeast Dianli University
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- GUAN Xiaohui
- Department of Applied Chemistry, Northeast Dianli University
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- UNUMA Hidero
- Materials Science and Engineering, Graduate School of Science and Engineering, Yamagata University
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Description
Magnetite (Fe3O4) nanoparticles were fabricated by hydrolyzing Fe2+ and Fe3+ ions with NaOH diffusing through a half-permeable membrane. The Fe3O4 nanoparticles, about 15 nm in diameter, showed ferrimagnetism with very small coercivity and remanent magnetization. The nanoparticles were combined with Sphaerotilus natans, a Gram negative bacterium used in biosorption of heavy metal ions in water, to prepare a composite biosorbent. The composite biosorbent showed excellent sorption properties to Pb2+ ion in a pH range between 6 and 8, and to Cr2O7 2- ion in a pH range below 4. The combination of Fe3O4 nanoparticles made it easy to separate the composite biosorbent from water by the use of a magnetic field and improved the sorption properties. It was also shown that the composite biosorbent was reusable after being rinsed with a dilute hydrochloric acid solution.<br>
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 115 (1344), 475-478, 2007
The Ceramic Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680259121152
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- NII Article ID
- 110006372071
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- NII Book ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL BIB ID
- 8848016
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
- OpenAIRE
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- Abstract License Flag
- Disallowed