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Protein-functionalized magnetic iron oxide nanoparticles: Time efficient potential-water treatment
KTH, Skolan för bioteknologi (BIO), Industriell bioteknologi. KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.
KTH, Skolan för bioteknologi (BIO), Industriell bioteknologi. Albanova University Center, Sweden.
2014 (Engelska)Ingår i: Nanotechnology for Sustainable Development, First Edition, Springer, 2014, s. 127-136Kapitel i bok, del av antologi (Övrigt vetenskapligt)
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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.

Ort, förlag, år, upplaga, sidor
Springer, 2014. s. 127-136
Nyckelord [en]
Coagulant protein, Magnetic separation, Magnetophoresis, Microemulsions, Purified moringa oleifera, Surface water
Nationell ämneskategori
Vattenbehandling Nanoteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-181272DOI: 10.1007/978-3-319-05041-6_10Scopus ID: 2-s2.0-84949034821ISBN: 9783319050416 (tryckt)OAI: oai:DiVA.org:kth-181272DiVA, id: diva2:902603
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QC 20160211

Tillgänglig från: 2016-02-11 Skapad: 2016-01-29 Senast uppdaterad: 2016-02-11Bibliografiskt granskad

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Okoli, ChukaBoutonnet, MagaliJärås, SvenRajarao-Kuttuva, Gunaratna
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Industriell bioteknologiKemisk teknologi
VattenbehandlingNanoteknik

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