High-flux affinity membranes based on cellulose nanocomposites for removal of heavy metal ions from industrial effluents [Elektronisk resurs]
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Karim, Zoheb (författare)
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Mathew, Aji P. (författare)
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Kokol, Vanja (författare)
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Wei, Jiang (författare)
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Grahn, Mattias (författare)
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Luleå tekniska universitet Institutionen för teknikvetenskap och matematik (utgivare)
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Luleå tekniska universitet Institutionen för samhällsbyggnad och naturresurser (utgivare)
- 2016
- Engelska.
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Ingår i: RSC Advances. - 2046-2069. ; 6:25, 20644-20653
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Sammanfattning
Ämnesord
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- Fully biobased affinity membrane processing and its application in the removal of heavy metal ions from mirror industry effluents were successfully demonstrated; indicating the potential use of these membranes in point-of-use or point-of-entry water cleaning products that are cheap, environmentally friendly and efficient. Layered cellulose nanocomposite membranes were fabricated using cellulose microfiber sludge as a support layer and cellulose nanocrystals (CNCSL, CNCBE or PCNCSL) in a gelatin matrix as the functional layer. Scanning electron microscopy (SEM) studies revealed the bi-layered morphology of the membrane and well-individualized nanocelluloses in the functional layer. Bubble point measurements confirmed the membrane pore structure in the microfiltration range (5.0-6.1 μm), which provided very high water permeability (900-4000 L h-1 m-2) at <1.5 bars. A tensile strength of 16 MPa in dry conditions and a wet strength of 0.2 MPa, was considered sufficient for use of these membranes in spiral wound modules. Mirror industry effluent laden with metal ions (Ag+ and Cu2+/Fe3+/Fe2+) when treated with cellulose nanocomposite membranes, showed high ion removal capacity, being 100% for PCNCSL followed by CNCBE than CNCSL. The removal of metal ions was expected to be driven by interactions between negatively charged nanocellulose and the positively charged metal ions.
Ämnesord
- Engineering and Technology (hsv)
- Industrial Biotechnology (hsv)
- Bio Materials (hsv)
- Teknik och teknologier (hsv)
- Industriell bioteknik (hsv)
- Biomaterial (hsv)
- Engineering and Technology (hsv)
- Chemical Engineering (hsv)
- Chemical Process Engineering (hsv)
- Teknik och teknologier (hsv)
- Kemiteknik (hsv)
- Kemiska processer (hsv)
- Trä och bionanokompositer (ltu)
- Wood and Bionanocomposites (ltu)
- Chemical Technology (ltu)
- Kemisk teknologi (ltu)
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