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Immobilization of Iron Nanoparticles on Multi Substrates and Its Reduction Removal of Chromium (VI) from Waste Streams
Citation:
Rahy, A., K. Yang, C. Bunker, M. Nadagouda, AND D. Yang. Immobilization of Iron Nanoparticles on Multi Substrates and Its Reduction Removal of Chromium (VI) from Waste Streams. Key Engineering Materials. Trans Tech Publications Inc., Durnten-Zurich, Switzerland, 521:153-162, (2012).
Impact/Purpose:
Water and Waste water treatment
Description:
This article describes the in-situ synthesis and immobilization of iron nanoparticles on several substrates at room temperature using NaBH4 as a reducing agent and ascorbic acid as capping agent. The method is very effective in protecting iron nanoparticles from air oxidation for more than 30 days. Substrates used to immobilize iron nanoparticles are spherical polymer resins (size of 100–200 mesh) and novel carbon substrates prepared from high temperature carbonization of e-spun nylon and poly-acrylonitrile fabrics. Iron nanoparticles (40–100nm) immobilized sample showed higher activity for the reductive removal of hazardous hexavalent Cr (VI) compared to free floating iron nanoparticles at ambient temperature. Iron immobilized substrates has a great potential to be used not only for the removal of Cr (VI) in waste stream but also for oxygen scavenger for food packaging.
