Virus Filtration in Porous Iron (III) Oxide Doped Ceramic Water Filters
The consumption of microbially - and virally - contaminated water is a pressing health issue in developing nations. The concentration of surface and underground water is often responsible for a high incidence of diarrheal diseases, especially among children under the age of five years . Ceramic water filters (CWFs) have been proposed as a household water treatment solution. However, despite their high bacterial filtration efficiency , existing CWFs cannot yet effectively remove viruses from water. Using MS2 bacteriophage as a model for human enteric viruses, this work explores the effect of doping CWFs with goethite (FeOOH) on the removal of viruses from contaminated waters. Fe-CWFs were found to remove bacteriophage from challenged water at significantly higher efficiencies than the control CWF. Filters composed of 60:40 ceramic:sawdust volume ratios and doped with different amounts of FeOOH were studied. A Fe-CWF containing 24.9 wt% Fe2O3 removed a mean of 1.93 log (98.83%) of MS2. The efficiency of viral filtration decreased significantly when the pH of the challenged water deviated from neutral (pH 5.9, 8.7 and 10.2). In addition, all Fe-CWFs tested removed more than 3 log (99.9%) of bacteria.
Prof. Wole Soboyejo, Dr. Shola Odusunya, Dr. Zebaze Kana, Dr. Nicolas Anuku, Dr. Karen Malatesta and Dr. Mohammed Dauda
N. H. Tsao et al., "Virus Filtration in Porous Iron (III) Oxide Doped Ceramic Water Filters", Advanced Materials Research, Vol. 1132, pp. 284-294, 2016