Urban aerosol refractive index prediction by partial molar refraction approach

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Environmental Science and Technology; (USA)

DOI:https://doi.org/10.1021/es00081a008· OSTI ID:6232292

Stelson, A W ^[1]

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1. Clark Atlanta Univ., GA (USA)

The ambient aerosol of the polluted troposphere is a complex mixture of water, electrolytes, ionic solids, metal oxides and glasses, and carbonaceous material. Prediction of the refractive indexes of these inhomogeneous mixtures can be a formidable task. Contained within this paper is the necessary parameterization to estimate the mean real aerosol refractive index based on aerosol chemical composition and the partial molar refraction approach. This approach assumes all chemical constituents are homogeneously distributed throughout the aerosol phase. Consistency of the data is discussed, and this approach is verified by prediction of refractive indexes of NaOH-Si-O{sub 2}-H{sub 2}O mixtures. Finally, aerosol chemical composition data from the Los Angeles Basin are used to predict mean real aerosol refractive indexes. These values are compared to urban aerosol refractive indexes calculated via other techniques (light scattering).

• OSTI ID: 6232292
• Journal Information: Environmental Science and Technology; (USA), Journal Name: Environmental Science and Technology; (USA) Vol. 24:11; ISSN ESTHA; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOL MONITORING
AEROSOLS
AIR POLLUTION MONITORING
ALKALI METAL COMPOUNDS
ATMOSPHERIC CHEMISTRY
CALCULATION METHODS
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DISPERSIONS
EARTH ATMOSPHERE
HYDROGEN COMPOUNDS
HYDROXIDES
MEASURING METHODS
MONITORING
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTIVITY
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLS
TROPOSPHERE
WATER