The Influence of Charged-Medium Filter on the Filtration Efficiency of Indoor Aerosol
Date Issued
2002-07-31
Date
2002-07-31
Author(s)
DOI
902211E002037
Abstract
In the study, the appropriate surfactants
were used to make the fibrous filter become
charged to increase the filtration efficiency.
The anionic surfactants (i.e., sodium dodecyl
sulfate and sodium oleate) and cationic
surfactant (i.e., dimethyl
dioctadecylammo-nium bromide) were used
to create the negative and positive
charged-medium filter, respectively. The
filtration efficiency of those filters was
investigated as function of particle size
(0.05-0.5 µm) and charge state (positive
charged, negative charged, and neutral) for
three face velocities (5, 10, and 15 cm/s). By
comparison, the filtration efficiency of the
treated fibrous filter has been shown to
increase 20-30% than no-treated fibrous filter
for neutral particles. The electrostatic particle
capture mechanisms were in addition to the
mechanical capture mechanism of the treated
fibrous filter. The results indicated that the
fibrous filter treated with surfactant become
the charged-medium filter.
Subjects
Charged-medium filter
filtration efficiency
surfactant
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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