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Simple monitoring of ultrafine particles Henk Goossens June 2011 - - PowerPoint PPT Presentation
Simple monitoring of ultrafine particles Henk Goossens June 2011 - - PowerPoint PPT Presentation
Simple monitoring of ultrafine particles Henk Goossens June 2011 Ultrafines a new type of hazardous air pollution The EU aims to begin regulation of ultrafine particles in 2013 , said Andre Zuber in a keynote speech on behalf of the
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Ultrafines – a different type of air pollution
Inhalable particles: PM10 < 10 m PM2.5 < 2.5 m ultrafine particles (UFP) 0.01 – 0.30 m
10 µm 10 000 nm 1 µm 1 000 nm 0.1 µm 100 nm 0.01 µm 10 nm diameter of a human hair (60 µm) ultra-fine particles fine particles
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Toxicology of ultrafines differs from PM10/2.5
Coarse particles are caught in the nose and throat Ultra-fine particles deposit deep in the lungs
1.0 10 60 0.001 0.01 0.1 100 Particle diameter (µm) Deposition percentage 20 40 80 100 Deposition of airborne particles in deep parts of the lungs (alveoli) as a function of their diameter (source: ICRP, 1994)
diesel smoke diesel smoke tobacco smoke tobacco smoke tobacco smoke ultra-fine particles
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Ultrafines need new monitoring equipment
- Number/surface instead of mass
- Small and simple equipment to check
local, traffic related sources
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Aerasense ultrafine monitoring technology
- Detects
– number concentration – average diameter
- f ultra fine particles (10 – 300
nm)
- Infers surface area concentration
- Measures accurately and real-
time
- Small and easy to use
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Simple application
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Aerasense measures concentration levels accurately
20 40 60 80 100 19:45 21:45 23:45 1:45 3:45 5:45 time (hh:mm) N*10
- 3 (particles/cm3)
■ SMPS
Philips NanoTracer
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20 40 60 80 100 19:45 21:45 23:45 1:45 3:45 5:45 7:45 9:45 time (hh:mm) dp,av (nm)
Aerasense measures particle diameter accurately
■ SMPS
Philips NanoTracer
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10 Process or location UFP concentration level (particles/cm3) Main particle size (nm)
- utdoor, office
up to 10.000 silicon melt up to 100.000 280-520 metal grinding up to 130.000 17-170 soldering up to 400.000 36-64 plasma cutting up to 500.000 120-180 bakery up to 640.000 32-109 airport field up to 700.000 < 40 welding 100.000 – 40.000.000 40-600
Average UFP exposure levels measured in a wide variety of work places as measured by the German workers health protection institute BGIA
Aerasense is an established technology for
- ccupational exposure to ultrafines
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Thank you
www.aerasense.com henk.goossens@philips.com
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Aerasense technology
Air in Current meter attached to Faraday cage for measuring Isensor Fan Air out
Vscr
Vcor
Needle-tip electrode surrounded by a gauze electrode
Vpl
Isensor = I1 Isensor = I2 Isensor = 0 time Vpl = V1 Vpl = 0 Precipitation section Charging section Inlet section Sensing section