Evaluation of the Performance of Iodine-Treated Biocidal Filters Under the Influence of Environmental Parameters
Abstract
This project final report summarizes a collaborative effort to evaluate the ability of a patented product in which a contact-transfer disinfectant, poly(4-styrene[trimethylammonium]methyl 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2013
- Accession Number
- ADA586855
Entities
People
- Chang-yu Wu
- Hsing-wang Li
- Myung-heui Woo
Organizations
- University of Florida