Journal of Radioanalytical and Nuclear Chemistry

, Volume 314, Issue 2, pp 1149–1159 | Cite as

Monitoring and extraction of uranium in polluted acid mine drainage by super-paramagnetic nanoparticles coated with carbon nanodots

  • Alexandre Loukanov
  • Hibiki Udono
  • Ryo Takakura
  • Polina Mladenova
  • Naritaka Kobayashi
  • Ryuzo Kawamura
  • Seiichiro Nakabayashi
Article
  • 108 Downloads

Abstract

In this contribution, we designed environmentally friendly magnetic nanoparticles for simultaneously monitoring and efficiently extracting uranium (VI) from polluted acid mine drainage (>99% of the total uranium amount). The nanoparticles consist of super-paramagnetic core made of Fe3O4, which is chemically coated with highly-fluorescent shell made of carbon nanodots. The small nanoparticle diameter enables good water dispersibility, high mobility in suspension and powerful sorbent activity to U(VI) in the presence of sulfates, bicarbonates, and pH 4.3–4.8. The measured detection limit of uranium (VI) in model solutions of acid mine drainage was found to be around 0.8 ppm.

Keywords

Environmenat friendly super-paramagnetic nanoparticles Carbon nanodots Uranium monitoring and extraction 

Notes

Acknowledgements

The authors are grateful to Saitama University for the financial support of this work. The investigations about nanoparticle synthesis and characterization were performed at Saitama University, Japan with the contribution of Ms. Hibiki Udono and Mr. Ryo Takakura. The AFM and TEM observation at Saitama University was done with the contribution of Dr. Naritaka Kobayashi and Dr. Ryuzo Kawamura. All experiments with uranium (VI) are done in the University of Mining and Geology “St. Ivan Rilski”-Bulgaria with the contribution of Dr. Alexandre Loukanov. We would like to thank to Prof. Takashi Fujihara (Saitama University) for the FT-IR measurements and to Dr. Margarita Georgieva from the Journal of Formal, Informal and Natural Education (www.journalfine.com) for proofing and editing this text.

Supplementary material

10967_2017_5471_MOESM1_ESM.doc (1.1 mb)
Supplementary material 1 (DOC 1101 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.Department of Chemistry, Faculty of Science, Graduate School of Science and EngineeringSaitama UniversitySaitamaJapan
  2. 2.Laboratory of Engineering NanoBiotechnology, Department of Engineering GeoecologyUniversity of Mining and Geology “St. Ivan Rilski”SofiaBulgaria

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