INDOOR AEROSOL

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INDOOR AEROSOL

• SEUNGO KIM

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Overview

• Introduction
• Concentrations vs. Exposures
• Indoor aerosol Sources
• Measurement Strategies
• Sampling and Analysis Methods
• Particle Sizing Characterization
• Applications

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Introduction

• What is indoor aerosol?
• Why indoor aerosol important?
• How to measure?
• -Most time spent indoors
• -Human health
• -Sick house syndrome
• -Multiple chemical sensitivity

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Concentrations vs. Exposures

• sources ? emissions ? concentrations ? exposures
  ? doses effect
• Importance of assessment

US.EPA,1989jenkins et al.,1990
Rodes et al.2000
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Concentrations vs. Exposures
important processes that affect the indoor
concentration of outdoor PM2.5
http//eetd.lbl.gov/newsletter/nl14/images/aerosol
-house-flow.gif
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Sources
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Measurement Strategies

• Fixed location, Portable
• Inlet, Cut points, Filters
• Limitation
• - Time, Space, Accuracy, Flow,

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Measurement Strategies
Aerosol measurement p864.
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Sampling and Analytical Methods

• Physical
• - size, number, morphology.
• Chemical
• - elemental and chemical constituent.
• Biological
• - potentially harmful bioaerosols

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Instruments

• Familiar Instruments
• - Impactor
• - SMPS
• - Impinger
• - Denuder
• - Cyclone
• -Next page-
• Commercially available Instruments

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Particle Sizing Characterization
Representative Personal Exposure Monitor and
microenvironmental monitor components that are
commercially available
Aerosol measurement p868.
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Particle Sizing Characterization

• Some specific samplers
• Inlets with specific cut points
• PM2.5 would be deposited
• in the alveolar region.

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Particle Sizing Characterization

• Fine particles (lt2.5micron) generated by
  condensation, nucleation.
• Smoking, heating, cooking, infiltration of
  ambient particles.
• Coarse particles (gt2.5micron) generated by human
  activities.

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Particle Sizing Characterization
K.W.Tu, Earl O. Knutson Aerosol Science and
Technology1988
Particle diameter, 0.09-3µm air infiltration
rate, 0.2-0.3 air changes/h. (A) Cooking (B)
wood smoke (fire place) (C) cigarette smoldering
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Particle Sizing Characterization
P Yli-Pirilä, T Raunemaa, A Hirvonen, Indoor
Air2002
(A) Old swimming pool
(B) New swimming pool
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Particle Sizing Characterization
Water Air Soil Pollut Focus (2008) 83547
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Particle Sizing Characterization
Water Air Soil Pollut Focus (2008) 83547
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Particle Sizing Characterization
Water Air Soil Pollut Focus (2008) 83547
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Indoor vs. Outdoor

• Concentration
• Chemical components
• Less oxidized than outdoor
• Humidity (Seinfeld, Pandis1998)
• Outdoor ambient samplers need wide range of wind
  speeds and precipitation

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Applications

• Computational Fluid Dynamics software Fluent
  (CFD)
• BLK412(office)
• BLK403(lab)

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BLK412
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BLK412
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BLK412
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BLK412
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BLK403
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Application BLK403
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BLK403
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BLK403
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PSD BLK403

• Particle Size Distribution

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Summary