Virus pH?Dependent Interactions with Cationically Modified Cellulose and Their Application in Water Filtration

Norovirus and Rotavirus are among the pathogens causing a large number of disease outbreaks due to contaminated water. These viruses nanoscale particles that difficult remove by common filtration approaches which based on physical size exclusion, require adsorption-based methods. This study reports pH-responsive interactions with cationic-modified nanocellulose demonstrates filter material adsorbs can be regenerated changing solution's pH. The bacteria Qbeta MS2, diameters below 30 nm but different surface properties, used evaluate pH-dependency process. Small angle X-ray scattering, cryogenic transmission electron microscopy, ?-potential measurements analyze changes in their nanostructure properties virus upon adsorption. removal capacity cationic cellulose-based aerogel is 99.9% for MS2 93.6% Qbeta, at pH = 7.0; desorption mostly intact occurs 3.0. results contribute fundamental understanding pH-triggered virus-nanocellulose self-assembly guide design sustainable environmentally friendly materials as well phage virus-based materials.