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Related Experiment Videos

Efficiency of passive sampling by adsorbents.

D W Underhill

    American Industrial Hygiene Association Journal
    |May 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Passive sampler efficiency depends on adsorption isotherms. For the Dubinin-Radushkevich isotherm, particularly with activated charcoal, high sampling efficiency persists even when the adsorbent is significantly utilized.

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    Area of Science:

    • Environmental Science
    • Analytical Chemistry

    Background:

    • Adsorption isotherms significantly impact passive sampler efficiency.
    • Understanding these relationships is crucial for accurate environmental monitoring.

    Purpose of the Study:

    • To calculate passive sampling efficiency using dimensionless variables.
    • To analyze efficiency under Langmuir, Freundlich, and Dubinin-Radushkevich adsorption isotherm models.

    Main Methods:

    • Utilized dimensionless variables for calculating sampling efficiency.
    • Modeled adsorption processes based on three distinct isotherm types.

    Main Results:

    • Demonstrated the influence of different isotherms on sampling efficiency.
    • Highlighted that for the Dubinin-Radushkevich isotherm, high efficiency is maintained until substantial adsorbent capacity is used.

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    Conclusions:

    • Passive sampler performance is critically linked to the governing adsorption isotherm.
    • The Dubinin-Radushkevich model suggests robust efficiency for activated charcoal samplers over a wide usage range.