1. No category

Ultrafine particles, black carbon and
soot emissions in Tehran
Vahid Hosseini, Ph.D.
FCE, Sharif University of Technology
Tehran Air Quality Control Co.
with contributions from
Solmaz Ahadi ( AQCC), Mohamad Javad Afroughi (FCE), Prof. Mohammad Arhami (Sharif
University), Hossein Shabazi (AQCC)
The first public private partnership (PPP) for clean diesel future in Iran
April 15th, 2015, Boostane Goftegoo, Tehran, I.R. Iran
Report of Tehran Air Quality
AQI report for the last 13 years in Tehran
Statistics of Tehran air quality based on AQI for the last two Iranian calendar years
Unhealthy
151-200
Unhealthy
for
Sensitive
Groups
101-150
Healthy
51-100
Unhealthy,
12
Unhealthy
for
Sensitive
Groups, 148
Unhealthy, 4
Good, 16
Good, 3
Unhealthy
for Sensitive
Groups, 112
healthy,
202
healthy, 233
Good
0-50
1392 (21 March 2013 to
20 March 2014 (
1393 (21 March 2014 to
20 March 2015 (
AQI based on PM2.5, variation during last Iranian year
AQI based on PM10, variation during last Iranian year
Monthly concentrations of PM10 & PM2.5 during the year 1393
PM10
Cons. µg/m3
(21 March 2014 - 20 March 2015)
160
140
120
100
80
60
40
20
0
Months
70
PM2.5
Cons. µg/m3
60
50
40
30
20
10
0
Months
Annual Concentration of PM10 in AQCC Stations in 1393
(21 March 2014 to 20 March 2015)
Annual Concentration of PM2.5 in AQCC Stations in 1393
(21 March 2014 to 20 March 2015)
Daily Concentration of PM10 & PM2.5 in a sample air quality monitoring station in Tehran
(March 2014- February 2015)
Hourly average concentration of PM10 & PM2.5 in a selected air quality monitoring
station (March 14-18, 2015)
Particle counting
PM0.7 ( below 700 nm)
Use of diffusion particle counter ( DiscMini)
A Comparison of Diurnal Concentration of Nanoparticles
Between Tehran, Zurich and Basel
Daily particle number count in two traffic and urban stations
Comparison of particle counts at various air quality monitoring stations
Averaged values of particle counts over all air quality monitoring stations
Source apportionment
studies
‫منابع احتمالی باتوجه به ترکیبات کربنی موجود در‬
‫)‪(PM2.5‬ذرات بسیار ریز‬
‫‪20‬‬
‫‪15‬‬
‫‪5‬‬
‫‪0‬‬
‫‪12‬‬
‫‪10‬‬
‫‪8‬‬
‫‪6‬‬
‫)‪EC (Ug/m3‬‬
‫‪4‬‬
‫‪2‬‬
‫‪0‬‬
‫)‪OC (Ug/m3‬‬
‫‪10‬‬
Comparison with other cities
Europe
16
OC
Mobile sources
and VOCs
USA
South China
America
12
8
Tehran
4
Ug/m3
0
EC
HDVs and
heavy fuels
Athena - Amsterdam - Barcelona- Pittsburg -Los Angles -Mexico City- Shanghai
6
4
2
0
Tehran
Emission inventory
Tehran annual PM emission sources
Morning rush hour traffic density
Private diesel bus
Municipality public transit bus
Morning rush hour traffic density
Diesel truck
Diesel mini bus
Concluding remarks
• Tehran air particulate matter concentration has reached a
very dangerous level and immediate actions are needed.
• Contribution of mobile sources to the particles is quite
obvious.
• Black carbon (soot) fraction of particles are considerable.
• For a comprehensive understanding, mass measurement,
number count, chemical composition analyses, and size
distribution studies are needed.