Some introduction of particulate matter ( PM2.5 )

Introduction into PM2.5 (particulate matter)
TSP total suspended particle
coarse particle PM10
fine particle PM2.5
ultrafine particle PM with diameter ＜100nm
nanoparticle ＜10nm

PM2.5 has highly complicated contents
Particle core of carbonaceous material
organic carbon：PAHs（多环芳烃）, nitro-PAHs, quinones(类醌)
translational metals: Fe Ni Cu V(钒) Co Cr
biologic origin materials: virus, bacteria, endotoxins
soluble aerosol components: nitrates(NO3-), sulfates(SO42-), ammonium(NH4+)
other inorganic components
PM2.5 and cardiopulmonary disease
Long term exposure:
cause DNA damage, increase risk of lung cancer
induces respiratory diseases, arteriosclerosis
influence children behavior
Short term exposure:
cause worsening of asthma, bronchitis and other respiratory diseases
change heart-rate variability
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