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Water Purification Using Functionalized Cellulosic Fibers with Nonleaching Bacteria Adsorbing Properties
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.ORCID iD: 0000-0002-1656-1465
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.ORCID iD: 0000-0003-3858-8324
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.ORCID iD: 0000-0003-1812-7336
2017 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 13, p. 7616-7623Article in journal (Refereed) Published
Abstract [en]

 Portable purifi cation systems are easy ways to obtain clean drinking water when there is no large-scale water treatment available. In this study, the potential to purify water using bacteria adsorbing cellulosic fi bers, functionalized with polyelectrolytes according to the layer-by-layer method, is investigated. The adsorbed polyelectrolytes create a positive charge on the fi ber surface that physically attracts and bonds with bacteria. Three types of cellulosic materials have been modifi ed and tested for the bacterial removal capacity in water. The time, material-water ratio and bacterial concentration dependence, as well as the bacterial removal capacity in water from natural sources, have been evaluated. Freely dispersed bacteria adsorbing cellulosic fi bers can remove greater than 99.9% of Escherichia coli  from nonturbid water, with the most notable reduction occurring within the fi rst hour. A fi ltering approach using modifi ed cellulosic fi bers is desirable for purifi cation of natural water. An initial fi ltration test showed that polyelectrolyte multilayer modifi ed cellulosic fi bers can remove greater than 99% of bacteria from natural water. The bacteria adsorbing cellulosic fi bers do not leach any biocides, and it is an environmentally sustainable and cheap option for disposable water purification devices.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 13, p. 7616-7623
Keyword [en]
cellulose, water treatment, water purification, layer by layer, multilayer adsorption, bacteria removing
Keyword [sv]
Vattenrening, cellulosa, pappersmassa, multilager, bakterieadsorption
National Category
Paper, Pulp and Fiber Technology
Research subject
Fibre and Polymer Science
Identifiers
URN: urn:nbn:se:kth:diva-218668DOI: 10.1021/acs.est.7b01153ISI: 000405056200035Scopus ID: 2-s2.0-85024408693OAI: oai:DiVA.org:kth-218668DiVA, id: diva2:1161429
Note

QC 20171204

Available from: 2017-11-30 Created: 2017-11-30 Last updated: 2017-12-04Bibliographically approved

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Publisher's full textScopushttp://pubs.acs.org/doi/abs/10.1021/acs.est.7b01153

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Ottenhall, AnnaEk, MonicaIllergård, Josefin

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