Suspended particulate matter: seasonal variation in specific surface areas and densities

Corn, Morton; Montgomery, Thomas L.; Esmen, Nurtan A.

doi:10.1021/es60049a001

Cited by 29 publications

(15 citation statements)

References 3 publications

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“…The extrapolated compound-dependent increases in log K p,s for quartz between RH 42% and RH 10% were therefore subtracted from the log K p,s values for (NH4)2SO4(s) obtained in this study. Corn et al (21) reported that a TSP ) 1.9 m 2 /g for UPM collected during the summer in Pittsburgh, PA. The a TSPnormalized ambient smog n-alkane data are also plotted in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

Gas/Particle Partitioning of Semivolatile Organic Compounds To Model Inorganic, Organic, and Ambient Smog Aerosols

Liang¹,

Pankow²,

Odum³

et al. 1997

Environ. Sci. Technol.

146

118

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Gas/particle (G/P) partitioning is an important process that affects the deposition, chemical reactions, long-range transport, and impact on human and ecosystem health of atmospheric semivolatile organic compounds (SOCs). Gas/ particle partitioning coefficients (K p ) were measured in an outdoor chamber for a group of polynuclear aromatic hydrocarbons (PAHs) and n-alkanes sorbing to three types of model aerosol materials: solid ammonium sulfate, liquid dioctyl phthalate (DOP), and secondary organic aerosol (SOA) generated from the photooxidation of whole gasoline vapor. K p values were also measured for ambient n-alkanes sorbing to urban particulate material (UPM) during summer smog episodes in the Los Angeles metropolitan area. Based on the K p values obtained for the aerosols studied here, for environmental tobacco smoke (ETS), and for a quartz surface, we conclude that G/P partitioning of SOCs to UPM during summer smog episodes is dominated by absorption into the organic fraction in the aerosol. Comparisons of the partitioning of SOCs to three different types of aerosols demonstrate that (1) DOP aerosol may be a good surrogate for ambient aerosol that consists mainly of organic compounds from primary emissions; (2) ETS particles may be a good surrogate for SOA; and (3) the sorption properties of ambient smog aerosol and the chamber-generated SOA from gasoline are very similar. The similarities observed between ambient smog aerosol and chamber-generated SOA from gasoline support the use of literature SOA yield data from smog chamber studies to predict the extent of SOA formation during summer midday smog episodes.

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Section: Resultsmentioning

confidence: 99%

Gas/Particle Partitioning of Semivolatile Organic Compounds To Model Inorganic, Organic, and Ambient Smog Aerosols

Liang¹,

Pankow²,

Odum³

et al. 1997

Environ. Sci. Technol.

146

118

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“…The specific surface area and density of suspended particulate matter in Pittsburgh air at this site have been reported; 16 density and specific area average 2.2 g/cm 3 and 2.5 m 2 /g, respectively. The arithmetic mean projected area diameter was 1.9 /xM, as determined by phase contrast microscopy.…”

Section: Interaction Of Sulfur Dioxide With Suspended Particulate Matmentioning

confidence: 81%

Interactions of Sulfur Dioxide with Insoluble Suspended Particulate Matter

Corn

Cheng

1972

Journal of the Air Pollution Control Association

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“…None of previous studies has done the surface area of PMlOn. The only real measurement of surface area is for TSP and within 2.32 to 5.50 M 2 /g [ 1 ]. Thus, PMlOn has higher specific surface area because of the smaller particle size of PMlOn.…”

Section: Resultsmentioning

confidence: 99%

“…It is found that the sampling time should not be over 30 minutes to avoid the accumulation of particles on the filter There are two SEM experiments because of the limitation of cost, equipment and time. On the other hand, the particle samples collected form consecutive 4 to 7 days of PM10 u, were dried in the over at 110° C and then gently removed using a brush pen [ 1 ]. The measuremnet of specific surface area was taken by a Quantachrome Autosorb Automated Gas Adsorption System using Nitrogen as adsorption gas There is a total of 3 successful experiments for the surface area measurement.…”

Section: Particulate Shape and Surface Areamentioning

confidence: 99%

The partitioning model of PAHs betweeen gaseous and particulate phases based on PM 10μ in urban atmosphere

Lee

Huang

1992

Journal of Environmental Science and Health . Part A: Environme

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A new partitioning model of the PAHs between gaseous and paniculate phases for PM10μ, Log { (A/F) PM10μ } = m /T + b, was investigated in this study. Where A and F stand for PAHs amount in gas and particulate phases respectively. PM10μ is the mass of PM10μ, T represnets the ambient temperature, and m and b are constants. A basic assumption of current model is the proportionality between the particle surface area available for adsorption of PAHs and the particle mass . But, this is not true most of time.Thus, the partitioning model is further modified by using surface area of particle. Both models were evaluated by real measurements of PAHs content 2051 . 2052 LEE AND HUANG in gaseous and paniculate phases. A series of ambient sampling of PAHs for gaseous and particulate phases by using the PM10μ sampler, cascade impactor, and volatile vapor sampler (PS-1 sampler) were performed during 1990 and 1991 in downtown of Taipei city. In particular, it is the first time the real measurement of PM10μ surface area in urban atmosphere has ever been taken by Automated Adsorption System. Also, partice shape of PMlOu, separated by the cascade impactor were examined by SEM. The performance of partitioning models of both PM10μ mass and surface area were evaluated by the regression analysis between the term on the left hand side of the model and the inverse of temperature for Fluoranthene, Pyrene and Chrysene +Benzo(a)anthracene. It is indicated that partitioning model using surface area does provide higher coefficient of determination(r 2 ), particularly for Chr+BaA.

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Suspended particulate matter: seasonal variation in specific surface areas and densities

Cited by 29 publications

References 3 publications

Gas/Particle Partitioning of Semivolatile Organic Compounds To Model Inorganic, Organic, and Ambient Smog Aerosols

Gas/Particle Partitioning of Semivolatile Organic Compounds To Model Inorganic, Organic, and Ambient Smog Aerosols

Interactions of Sulfur Dioxide with Insoluble Suspended Particulate Matter

The partitioning model of PAHs betweeen gaseous and particulate phases based on PM 10μ in urban atmosphere

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