Accession Number : ADA461967


Title :   Evaluation of the Performance of Iodine-Treated Biocide Filters Challenged with Bacterial Spores and Viruses


Descriptive Note : Final technical rept.


Corporate Author : FLORIDA UNIV GAINESVILLE DEPT OF ENVIRONMENTAL ENGINEERING SCIENCES


Personal Author(s) : Lee, Jin-Hwa ; Wu, Chang-Yu


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a461967.pdf


Report Date : Nov 2006


Pagination or Media Count : 64


Abstract : Filter media coated with a cationic resin in triiodide form were challenged by Bacillus subtilis spores and MS2 bacteriophage aerosols delivered from a Collison nebulizer through air at 35% RH and 23 C at 14.2 cm/s face velocity. Bacteria were classified and collected in a 6-stage Andersen impactor; serially connected AGI-30 impingers were used in phage experiments. Average bacterial removal efficiency was 99.9991% for untreated (UM) and 99.9994% for treated media (TM); viral removal was 92% for UM and 94% for TM. Microbes collected on filters were extracted into water using a vortex mixer. After correction for effects of extracted iodine, 0.25% of bacteria survived on UM and 0.069% on TM, while 4.2% of phages survived on UM and 2.2% on TM. Increasing concentrations of virus in the nebulizer showed no clear effect from agglomeration.


Descriptors :   *FILTERS , *DISINFECTION , *BIOCIDES , SPORES , BACILLUS SUBTILIS , BACTERIOPHAGES , BIOTERRORISM , BACTERIAL AEROSOLS , BIOLOGICAL WARFARE AGENTS , VIRUSES , IODINE


Subject Categories : Toxicology
      Microbiology
      Chemical, Biological and Radiological Warfare


Distribution Statement : APPROVED FOR PUBLIC RELEASE