Modification of ceramic microfilters with colloidal zirconia to promote the adsorption of viruses from water

Analytical Methods for Food and Environmental Viruses

“…The adsorption and elution of viruses using charged membranes or filters has been widely used for many years to concentrate EV, PV, RV, HAV, NoV, AdV, AstV and bacteriophages from water samples (Abbaszadegan et al 1999;Ali and Abdel-Dayem 2003;Alonso et al 1994;Borrego et al 1991;Calgua et al 2008;Chapron et al 2000;Dahling 2002;Farber et al 1983;Farrah et al 1977;Gassilloud et al 2007;Haramoto et al 2004;Hill et al 1976;Huang et al 2000;Karim et al 2009;Keswick et al 1984;Kittigul et al 2005;Kittigul et al 2006;Lambertini et al 2008;Li et al 1998;Logan et al 1980;Lukasik et al 2000;Melnick et al 1984;Myrmel et al 1999;Papageorgiou et al 2000;Preston et al 1988;Sattar 1979, 1980;Rutjes et al 2005;Schwab et al 1995Schwab et al , 1996Shields et al 1985;Sobsey and Glass 1980;Sobsey and Jones 1979;Sobsey et al 1973Sobsey et al , 1985Sobsey et al , 2004Tansuphasiri et al 2000;Toranzos and Gerba 1989;Victoria et al 2009;Wegmann et al 2008). The approach h...…”

Nanostructured surface modification of microporous ceramics for efficient virus filtration

“…These carboxylate-modified microspheres have a negative zeta potential and a particle size of 39.3 ± 5.0 nm across the pH range 3-9, characteristics which make them ideal model particles to represent well dispersed, non-coagulated viruses. 17 A bright-yellow dispersion with ≈10 15 monospheres/L in a standardized water (see below) was manually pumped through the filter under test (20 • C/pressure cycles ≈0-10 bar) and any obvious reduction in the coloration of the eluate relative to the feed dispersion was noted.…”

“…17 This consisted of deionized water with an initial pH of 5 and a base conductivity of 20 S/cm in which NaCl (ACS reagent, Sigma-Aldrich) e was dissolved to adjust the conductivity to 400 S/cm.…”

“…17,18 Since this abundantly available silica-based filter medium, exhibiting an isoelectric point (IEP) around pH 2 is therefore generally negatively charged when immersed in water, the authors applied a nanostructured, high-specific surface area coating of zirconia to the internal surface area of extruded DE filter elements in an effort to impart a high adsorption capacity and generally positively charged surface to the filter. While promising microbiological results when filtering MS2 bacteriophages c were obtained, the applied coatings either failed to adsorb virus particles across the entire desired pH range (5)(6)(7)(8)(9), or were washed out by the passage of water through the filters.…”

High sensitive and ultrafast UV photodetector based on ZrO2 single crystals

“…Zirconium oxide (ZrO 2 ) is a technically important material, widely used in many optical fields acting as highreflectivity laser mirrors, filters, and waveguides as well as high-k gate dielectrics due to its high refractive index, large optical band gap, low optical loss and high dielectric constant [10][11][12][13][14]. Meanwhile, zirconium oxide has excellent thermal and chemical stability and large resistance against high temperatures and oxidation.…”