Accession Number:

ADA586855

Title:

Evaluation of the Performance of Iodine-Treated Biocidal Filters Under the Influence of Environmental Parameters

Descriptive Note:

Final rept. 8 Feb 2006-30 Sep 2012

Corporate Author:

FLORIDA UNIV GAINESVILLE DEPT OF ENVIRONMENTAL ENGINEERING SCIENCES

Report Date:

2013-02-01

Pagination or Media Count:

83.0

Abstract:

This project final report summarizes a collaborative effort to evaluate the ability of a patented product in which a contact-transfer disinfectant, poly4-styrenetrimethylammoniummethyl triiodide PSTI is incorporated into an air filter medium to disinfect penetrating bioaerosols. After several false starts a quenching experiment capturing MS2 phage particles filtered through PSTI and captured in thiosulfate solution in an impinger showed that the iodine--aerosol chemistry is slow, and that earlier work based on capture-and-culture methods are blinded by the efficiency of kill by iodine in any aqueous medium. Moderate dependencies of bioaerosol characteristics and stability on environmental conditions and delivery medium were measured and reported. A device and method to achieve reproducible, controlled deposition of viable viral and bacterial aerosol droplets was developed, which created a tool for standardized contamination of test articles that can be used to quantify and compare cleaning and decontamination methods. Alternative approaches to on-the-fly disinfection were developed and tested as possible alternatives to PSTI or another reactive air filtration medium as an enhancement to protectivity of next-generation individual and collective respiratory protective gear---particularly in potentially infective environments---and HVAC filters.

Subject Categories:

  • Hygiene and Sanitation
  • Inorganic Chemistry
  • Pumps, Filters, Pipes, Tubing, Fittings and Valves
  • Chemical, Biological and Radiological Warfare

Distribution Statement:

APPROVED FOR PUBLIC RELEASE