Highly water soluble and recovered dextran coated fe 3o 4 magnetic nanoparticles for brackish water desalination

Hongwei Bai, Zhaoyang Liu, Darren Delai Sun

Research output: Contribution to journalArticle

73 Citations (Scopus)


The dextran coated Fe 3O 4 magnetic nanoparticles (MNPs) have been successfully synthesized and used for brackish water desalination for the first time. The dextran coated Fe 3O 4 MNPs well meets the stringent criteria for draw solutes of forward osmosis (FO) process via technologically integrating the good solubility of dextran and strong magnetism of Fe 3O 4 nanoparticles. Our experimental results demonstrated that the dextran coated Fe 3O 4 MNPs are not only able to produce high osmotic pressure to draw clean water across FO membranes from brackish water, but also can be easily recovered from the diluted draw solution by an external magnet. Based on our currently conducted works, it is believed that the dextran coated Fe 3O 4 MNPs can be an ideal draw solute for brackish water desalination by using FO process in an environmental-friendly and energy-saving manner.

Original languageEnglish
Pages (from-to)392-399
Number of pages8
JournalSeparation and Purification Technology
Issue number3
Publication statusPublished - 10 Oct 2011
Externally publishedYes



  • Brackish water
  • Desalination
  • Dextran
  • Forward osmosis
  • Magnetic nanoparticles

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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