Table 2.
Particle exposure in the homes of the participants during sham and active indoor air filtration
| Filtration |
Living room |
Bedroom |
||
|---|---|---|---|---|
| Sham | Active | Sham | Active | |
| Particle number count (#/cm3) |
7669 (3435–45866) |
5352 (1241–56654) |
ND |
ND |
| PM2.5 total massa (μg/m3) |
8.0 (3.4–20.7) |
4.3 (0.2–12.2) |
7.6 (1.4–19.1) |
3.7 (0–14) |
| PM2.5 black carbon (BC) (ng/m3) |
ND |
ND |
480 (199–1328) |
219 (19.6–545) |
| PM2.5 UV absorbing PM (UVPM) (ng/m3) |
ND |
ND |
361 (191–792) |
201 (43.5–454) |
| PAHb (ng/m3) | 0.48 (0.06–2.4) | 0.25 (0.02–2) | ||
Values are median (5th, 95th percentile). ND: not determined.
aPM 2.5 total mass data have recently been reported elsewhere [19].
bSum of 13 different polycyclic aromatic hydrocarbons (PAH): phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, perylene, indeno(1,2,3-c,d)pyrene, dibenzo(a,h)anthracene, benzo(g,h,i)perylene.