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Document ID (ISN)111724
CIS number 11-0401
ISSN - Serial title 1545-9624 - Journal of Occupational and Environmental Hygiene
Year 2010
Convention or series no.
Author(s) Cho K.J., Jones S., Jones G., McKay R., Grinshpun S.A., Dwivedi A., Shukla R., Singh U., Reponen T.
Title Effect of particle size on respiratory protection provided by two types of N95 respirators used in agricultural settings
Bibliographic information Nov. 2010, Vol.7, p.622-627. Illus. 20 ref.
Abstract This study compared size-selective workplace protection factors (WPFs) of an N95 elastomeric respirator (ER) and an N95 filtering facepiece respirator (FFR) in agricultural environments. Twenty-five healthy farm workers ranging in age from 20 to 30 years voluntarily participated in this study. Altogether, eight farms were included representing three different types: two horse farms, three pig barns and three grain handling sites. Subjects wore the ER and FFR while performing their daily activities, such as spreading hay, feeding livestock and shovelling. Aerosol concentrations in an optical particle size range of 0.7-10μm were determined simultaneously inside and outside the respirator during the first and last 15 min of a 60-min experiment. For every subject, size-selective WPFs were calculated in 1-min intervals and averaged over 30 min. Results show that the N95 ER and FFR tested in the study provided an expected level of protection for workers on agricultural farms against particles ranging from 0.7 to 10μm. WPFs for the ER were higher than the FFR for all particle size ranges. WPFs for both respirator types increased with increasing particle size.
Descriptors (primary) particle size; aerosols; filter materials; filtration efficiency; facepieces; agriculture
Descriptors (secondary) USA; equipment testing; comparative study; livestock rearing; cereal farming
Document type D - Periodical articles
Subject(s) Personal protection
Agriculture, fishing, animal husbandry
Broad subject area(s) Chemical safety
Browse category(ies) Agriculture
Respiratory protection