Water purification ultrafiltration membranes using nanofibers from unbleached and bleached rice straw

There has been an increasing interest in recent years in isolating cellulose nanofibers from unbleached cellulose pulps for economic, environmental, and functional reasons. In the current work, cellulose nanofibers isolated from high-lignin unbleached neutral sulfite pulp were compared to those isol...

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Bibliographic Details
Published in:Scientific reports 2020-07, Vol.10 (1), Article 11278
Main Authors: Hassan, Mohammad L., Fadel, Shaimaa M., Abouzeid, Ragab E., Abou Elseoud, Wafaa S., Hassan, Enas A., Berglund, Linn, Oksman, Kristiina
Format: Article
Language:English
Subjects:
639/301/357
639/301/923/1028
639/925/357
Cellulose
Fibers
Filter paper
Humanities and Social Sciences
Lignin
Membranes
multidisciplinary
Nanoparticles
Pollutants
Pulp
Rice straw
Science
Science (multidisciplinary)
Straw
Sulfite
Thin films
Trä och bionanokompositer
Ultrafiltration
Vacuum
Vacuum filtration
Wastewater
Water purification
Wood and Bionanocomposites
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Summary:There has been an increasing interest in recent years in isolating cellulose nanofibers from unbleached cellulose pulps for economic, environmental, and functional reasons. In the current work, cellulose nanofibers isolated from high-lignin unbleached neutral sulfite pulp were compared to those isolated from bleached rice straw pulp in making thin-film ultrafiltration membranes by vacuum filtration on hardened filter paper. The prepared membranes were characterized in terms of their microscopic structure, hydrophilicity, pure water flux, protein fouling, and ability to remove lime nanoparticles and purify papermaking wastewater effluent. Using cellulose nanofibers isolated from unbleached pulp facilitated the formation of a thin-film membrane (with a shorter filtration time for thin-film formation) and resulted in higher water flux than that obtained using nanofibers isolated from bleached fibers, without sacrificing its ability to remove the different pollutants.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-67909-3