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Fully biobased nanocomposite membranes: removal of heavy metals from polluted water
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
2014 (English)Conference paper, Presentation (Refereed)
Abstract [en]

Biobased nanoparticles viz cellulose nanocrystals (CNCs) and cellulose nanofiber (CNFs) isolated by mechanical process (grinding) were used to fabricate of fully biobased nanocomposite membranes. Biobased nanofibers were used as support layer via a very simple process of vacuum filtration was used for the fabrication of CNF support layer. In order to coat CNCs or CNCbio on the two sides to CNF layer, the membrane was dipped in a solution of cellulose nanocrystals. Scanning electron microscopy (SEM) confirmed the infusion of functional layer within supportive layer. Tensile strength was measured in dry as well as in wet conditions, illustrated mechanical performances compareble to commercially available membranes. To increase the flux, membranes were treated with acetone for 24 and 72 h. The drastic increase in the flux for acetone treated membranes confirmed the discontinuities of hydrogen . The membranes succefully removed two metal ions Ag+ and As3- from real wastewater, from mirror making and mining industries respectively, within Europe. Complete removal of Ag+ was reported after 24 h of incubation. The study concludes that, the developed membranes having good mechanical stability in wet conditions, high water flux and adsorption efficiency are potential candidates for heavy metal ion remediation of industrial effluents.

Place, publisher, year, edition, pages
2014.
Research subject
Wood and Bionanocomposites; Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-37320Local ID: b4db0f13-b934-41cd-80a6-ea072393043fOAI: oai:DiVA.org:ltu-37320DiVA: diva2:1010818
Conference
Dissemination Workshop for the Nano4water Cluster : 23/04/2014 - 24/04/2014
Note
Godkänd; 2014; 20140825 (ajimat)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Karim, ZohebMathew, Aji P.Oksman, KristiinaGrahn, Mattias
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