The recovery of selenious acid aerosols on glass fiber filters

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of the Air and Waste Management Association; (United States)

DOI:https://doi.org/10.1080/10473289.1991.10466836· OSTI ID:5383538

Oehm, G J; Crisp, P T; Ellis, J ^[1]

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1. Univ. of Wollongong, New South Wales (Australia)

Previous workers have shown that selenium is only partially trapped on a filter during air sampling. In some cases, these losses have been attributed to volatillization of selenium dioxide. Our results demonstrate that slenium dioxide, in the presence of moist air, is completely recovered (apparently as selenious acid aerosols) and that the previous shortfalls must be due to other selenium species as yet unidentified. Selenious acid aerosols in our study were formed by volatillizing selenium dioxide ({approx}3 mg) into a stream of moist ambient air (relative humidity, >50%), and trapped on glass fiber filters using a high-volume air sampler. Selenium(IV) was ultrasonically extracted from the filter with water and analyzed by atomic absorption spectrometry. Selenious acid aerosols were trapped on the filters with high efficiency (105 {plus minus} 5%) using a 50 minute sampling period. With an extended sampling period (24 hours) the recovery was 103 {plus minus} 6%.

• OSTI ID: 5383538
• Journal Information: Journal of the Air and Waste Management Association; (United States), Journal Name: Journal of the Air and Waste Management Association; (United States) Vol. 41:2; ISSN JAWAE
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTROSCOPY
AEROSOLS
AIR FILTERS
AIR POLLUTION MONITORING
AIR POLLUTION MONITORS
CHEMICAL COMPOSITION
COLLOIDS
DISPERSIONS
EFFICIENCY
EQUIPMENT
FILTERS
GLASS
MEASURING INSTRUMENTS
MONITORING
MONITORS
PH VALUE
POLLUTION CONTROL EQUIPMENT
SELENIUM COMPOUNDS
SOLS
SPECTROSCOPY
VOLATILITY