New apparatus for measuring radon adsorption on solid adsorbents

A new experimental system was designed to measure radon uptake by solid adsorbents from air or other carrier gases/vapors. The total amount of radon adsorbed corresponding to a specific gas-phase concentration was determined by simultaneously measuring the solid-phase and gas-phase concentrations. T...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 1991-09, Vol.30 (9), p.2205-2211
Main Authors: Hassan, Neguib M, Hines, Anthony L, Ghosh, Tushar K, Loyalka, Sudarshan K, Ketring, Alan R
Format: Article
Language:English
Subjects:
440100 - Radiation Instrumentation
440600 - Optical Instrumentation- (1990-)
ACTIVATION ENERGY
ADSORBENTS
ADSORPTION
ADSORPTION HEAT
ADSORPTION ISOTHERMS
AIR
Applied sciences
Atmospheric pollution
CARBON
CONCENTRATION RATIO
DATA
DESIGN
ELEMENTS
ENERGY
ENTHALPY
EQUILIBRIUM
Exact sciences and technology
FLUIDS
GASES
General processes of purification and dust removal
INFORMATION
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ISOTHERMS
MOLECULAR SIEVES
NONMETALS
OTHER INSTRUMENTATION
PHYSICAL PROPERTIES
Pollution
Prevention and purification methods
RADON
RARE GASES
SILICA GEL
SOLIDS
SORPTION
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMIC PROPERTIES
VAPORS
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Description
Summary:A new experimental system was designed to measure radon uptake by solid adsorbents from air or other carrier gases/vapors. The total amount of radon adsorbed corresponding to a specific gas-phase concentration was determined by simultaneously measuring the solid-phase and gas-phase concentrations. The system was used to measure radon adsorption isotherms on BPL activated carbon at 288, 298, and 308 K and on silica gel and molecular sieve 13X at 298 K. The isotherms were of type III according to Brunauer's classification. The heat of adsorption data indicated that the BPL activated carbon provided a heterogeneous surface for radon adsorption. The equilibrium data were correlated by the Freundlich equation. In this paper the possible adsorption mechanism and the use of the adsorption isotherms to measure indoor radon concentrations are discussed.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie00057a024