Cover Image
QR Code

Estimating Reusability of Organic Air-Purifying Respirator Cartridges.

Reuse of organic vapor air-purifying respirator cartridges after a job or shift can provide economy and energy savings. However, standards and manufacturers' guidance discourage reuse, presumably due to a lack of quantitative objective exposure and use information. Storage and simulated reuse labora...

Full description

Published in:Journal of Occupational & Environmental Hygiene Vol. 8; no. 10; pp. 609 - 618
Main Authors: Wood, Gerry O., Snyder, Jay L.
Format: equations & formulas research tables/charts Journal Article
Published: Taylor & Francis Ltd Oct2011
Online Access:View this record in EBSCOhost
fields @attributes:
  recordID: 1
pdfLink:
plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104692460&site=ehost-live
header:
  @attributes:
    shortDbName: ccm
    uiTerm: 104692460
    longDbName: CINAHL Complete
    uiTag: AN
  controlInfo:
    bkinfo:
    dissinfo:
    jinfo:
      jid:
        15459624
        V1L
      jtl: Journal of Occupational & Environmental Hygiene
      issn: 15459624
      maglogo: Y
    pubinfo:
      dt: Oct2011
      vid: 8
      iid: 10
      pid: 377
      pub: Taylor & Francis Ltd
      place: Philadelphia, Pennsylvania
    artinfo:
      ui:
        104692460
        65807832
        10.1080/15459624.2011.606536
        NLM21936700
        104692460
      ppf: 609
      ppct: 9
      formats:
        fmt:
          @attributes:
            type: P
      tig:
        atl: Estimating Reusability of Organic Air-Purifying Respirator Cartridges.
      aug:
        au:
          Wood, Gerry O.
          Snyder, Jay L.
        affil: Consultant, Los Alamos, New Mexico
      sug:
        subj:
          Respiratory Protective Devices
          Equipment Reuse
          Occupational Health
          Human
          New Mexico
          Models, Theoretical
          Refuse Disposal Economics
          Environmental Monitoring
          Adsorption
          Chromatography, Gas
          Quality Control (Technology)
          Costs and Cost Analysis
          Data Analysis Software
          Descriptive Statistics
          Correlation Coefficient
      ab: Reuse of organic vapor air-purifying respirator cartridges after a job or shift can provide economy and energy savings. However, standards and manufacturers' guidance discourage reuse, presumably due to a lack of quantitative objective exposure and use information. Storage and simulated reuse laboratory studies and modeling have been done to provide such information. Two important parameters of breakthrough curves, midpoint time (related to adsorption capacity) and midpoint slope (related to adsorption rate), have been shown to be unchanged during storage for reuse. Extrapolations to smaller breakthrough concentrations and times can be made from this reference breakthrough and time. Significant step increases in breakthrough concentration upon cartridge reuse have been observed in some cases. Values of immediate breakthrough concentrations upon reuse (IBURs) have been measured and correlated. The Dubinin/Radushkevich adsorption isotherm equation has been used to estimate maximum IBURs, which depend on many factors, including conditions and duration of first use. An empirical equation describing rate of approach to maximum IBUR as a function of storage time has been developed to provide intermediate IBUR estimates, which are also very dependent on the vapor identity and extent of first-use loading. Using these equations, IBUR estimates with appropriate safety factors can be compared with the allowable breakthrough concentration to help the Industrial Hygienist make reusability decisions.
      pubtype: Academic Journal
      doctype:
        equations & formulas
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
    refInfo:
    holdings:
      @attributes:
        islocal: N