Table 1.
Characteristics of carbon black, diesel exhaust particle, coal fly ash, NYC and Baltimore PM
| PM type (source) | Collection system | Collection date(s) | Size range | Physical/chemical Characterization |
|---|---|---|---|---|
| Carbon black (Regal 660) | Purchased in bulk | Purchased circa 1990 | Bulk PM Mean Diameter = 0.7 um Size between 0.1– 1.0 μm |
density= 1.95 g/cm3; specific surface area= 112 m2/g; composition= 96.90% carbon, 1.42% oxygen, 0.30% hydrogen |
| SRM 1650b (DEP) | Collected from four cycle heavy duty diesel engines. Obtained from Coordinating research council, Atlanta, GA. |
collected in 1983 | Bulk PM Mean diameter = 0.18um Size between 0.12–0.33 μm |
Derived from SRM1650a. |
| Coal Fly Ash (CFA) | Brandon Shores Unit, Baltimore | Collected in 1998 | Size between 10– 100 μm | The principal components of bituminous coal fly ash are silica, alumina, iron oxide with varying amounts of carbon. |
| NYC PM | Collected in Queens, NY using a high volume sequential cyclone | collected Nov 2009 to Jan 2010 | 0.3<d<2.5 Size between 0.3 and 2.5 μm |
Characterized for metals and ions. |
| Mean concentration = 8.21+/−2.5 μg/m3 (Han et al., JA & WMA 2012) | ||||
| Baltimore PM10 | Collected in Baltimore, MD with a modified high volume sequential cyclone # (Rule et al., JEM 2010) | Collected Fall 2012 | 0.3<d<10 Size between 0.3 and 10 μm |
Characterized for metals and ions |
| $ Mean concentration = 14.3+/− 7.5 μg/m3 |
#
Modified by eliminating the middle cyclone that would have collected PM between 2.5 μm and 10 μm
d: diameter