Copper-Coated Cellulose-Based Water Filters for Virus Retention

ACS Omega
Gergő P SzekeresThomas Graule

Abstract

Despite recent efforts in modernization of water treatment facilities, the problem of access to healthy drinking water for hundreds of millions of people has still not been solved. A water filter based on Cu-coated nanofibrillated cellulose with controlled porosity was prepared by the "paper-making" method. We have optimized the proper mass and ratio of functionalized and pure nanofibrillated cellulose for the preparation of the filter. MS2 bacteriophages were used to model human pathogenic virions. We tested our filter material in batch experiments and the fixed filters in flow experiments. The fabricated Cu-coated nanofibrillated cellulose filters were characterized by scanning electron microscopy, X-ray diffraction, specific surface area measurement (Brunauer-Emmett-Teller), dynamic light scattering, and inductively coupled plasma mass spectroscopy. Our measurements proved that the fixation of cellulose nanofibers plays a significant role in the degree of virus retention and it greatly enhances the efficiency of the filtration. By using these functionalized water filters, we were able to achieve a virus retention of at least 5 magnitudes (5Log) at three different pH values: 5.0, 7.5, and 9.

References

May 24, 2008·Biomacromolecules·Marielle HenrikssonTakashi Nishino
Jan 28, 2010·Journal of Applied Microbiology·B Michen, T Graule
May 26, 2010·Environmental Science & Technology·Vasiliki I Syngouna, Constantinos V Chrysikopoulos
Aug 13, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Andreas B FallLars Wågberg
Sep 6, 2011·Biomacromolecules·Houssine SehaquiLars A Berglund
Jan 5, 2013·Environmental Science & Technology·Benjamin MichenThomas Graule
Apr 2, 2014·Advanced Healthcare Materials·Giorgi MetreveliAlbert Mihranyan
May 26, 2015·Biochimie·Zeynep AltintasIbtisam E Tothill
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May 5, 2016·ACS Applied Materials & Interfaces·Simon Gustafsson, Albert Mihranyan
Feb 15, 2018·Journal of Nanoscience and Nanotechnology·G P SzekeresT Graule

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Citations

Feb 26, 2019·Royal Society Open Science·Zoltán NémethThomas Graule
Oct 9, 2019·Environmental Science & Technology·Laxmicharan SamineniStephanie Velegol

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Methods Mentioned

BETA
X-ray
scanning electron microscopy
dynamic light scattering
electrophoresis

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