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Protein-functionalized magnetic iron oxide nanoparticles: Time efficient potential-water treatment
KTH, School of Biotechnology (BIO), Industrial Biotechnology. KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
KTH, School of Biotechnology (BIO), Industrial Biotechnology. Albanova University Center, Sweden.
2014 (English)In: Nanotechnology for Sustainable Development, First Edition, Springer, 2014, 127-136 p.Chapter in book (Other academic)Text
Abstract [en]

Recent advances in nanoscience suggest that the existing issues involving water quality could be resolved or greatly improved using nanomaterials, especially magnetic iron oxide nanoparticles. Magnetic nanoparticles have been synthesized for the development and use, in association with natural coagulant protein for water treatment. The nanoparticles size, morphology, structure, and magnetic properties were characterized by transmission electron microscope, X-ray diffraction, and superconducting quantum interference device magnetometry. Purified Moringa oleifera protein was attached onto microemulsions-prepared magnetic iron oxide nanoparticles (ME-MION) to form stable protein-functionalized magnetic nanoparticles (PMO+ME-MION). The turbidity removal efficiency in both synthetic and surface water samples were investigated and compared with the commonly used synthetic coagulant (alum) as well as PMO. More than 90 % turbidity could be removed from the surface waters within 12 min by magnetic separation of PMO+ME-MION; whereas gravimetrically, 70 % removal in high and low turbid waters can be achieved within 60 min. In contrast, alum requires 180 min to reduce the turbidity of low turbid water sample. These data support the advantage of separation with external magnetic field (magnetophoresis) over gravitational force. Time kinetics studies show a significant enhancement in ME-MION efficiency after binding with PMO implying the availability of large surface of the MEMION. The coagulated particles (impurities) can be removed from PMO+ME-MION by washing withmild detergent or cleaning solution. To our knowledge, this is the first report on surface water turbidity removal using protein-functionalized magnetic nanoparticle.

Place, publisher, year, edition, pages
Springer, 2014. 127-136 p.
Keyword [en]
Coagulant protein, Magnetic separation, Magnetophoresis, Microemulsions, Purified moringa oleifera, Surface water
National Category
Water Treatment Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-181272DOI: 10.1007/978-3-319-05041-6_10ScopusID: 2-s2.0-84949034821ISBN: 9783319050416OAI: oai:DiVA.org:kth-181272DiVA: diva2:902603
Note

QC 20160211

Available from: 2016-02-11 Created: 2016-01-29 Last updated: 2016-02-11Bibliographically approved

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Okoli, ChukaBoutonnet, MagaliJärås, SvenRajarao-Kuttuva, Gunaratna
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ReferencesLink to record
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