Indoor aerosol - Indoor aerosol Min Zhong Click to edit...

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Click to edit Master subtitle style ENV 6130 Indoor aerosol Indoor aerosol Min Zhong Apr. 8th. 2010 11
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ENV 6130 Indoor aerosol 22 1. The importance of study indoor aerosol 2. Source of indoor aerosol 3. Particle size 4. Transport and behavior 5. Case study 5.1 Environmental tobacco smoke 5.2 Cooking aerosol 5.3 Bioaerosol contaminants 5.4 Indoor chemistry as a particle source Outline
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ENV 6130 Indoor aerosol What is indoor aerosol An indoor aerosol usually refers to that in residences and offices as distinguished from that in industrial workplaces. Indoor vs Outdoor Concentration Chemical components Less oxidized than outdoor 33
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ENV 6130 Indoor aerosol Why study indoor aerosol v We live indoor 44 The national human activity pattern survey 1996
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ENV 6130 Indoor aerosol v Health concerns 55 q According to the EPA -“ Indoor air pollution is one the top 5 most serious environmental problems affecting the health of humans in America” q According to the WHO- 40 percent of all buildings, pose a "serious health hazard” due to indoor air pollution. q Sick Building Syndrome is often linked to unhealthy Indoor Air Quality. Why study indoor aerosol
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ENV 6130 Indoor aerosol 66 Sick Building Syndrome (SBS) --Acute health and comfort effects experienced by building occupants that are apparently linked to time spent in the building. (EPA) --headache, fatigue, cough, sneezing…. --No specific illness identified --Syndrome diminish rapidly when people leave the building Causes -- Indoor particles, Tobacco smoke, biological contaminants, VOCs… www.home-air-purifier- expert.com/ Health effect
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ENV 6130 Indoor aerosol 77 Health effect cont. www.home-air-purifier- expert.com/ q Infants and young children are the groups shown to be more susceptible to indoor pollutants. ü Baby and children generally breathe more rapidly than adults, which increases their exposure to any pollutants in the air ü A baby's lungs are still developing and therefore are more sensitive than an adult's.
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ENV 6130 Indoor aerosol 88 Source of indoor aerosol v Outdoor source Suspended particles: soil, sea salt, road dust, SOA, biological aerosols v Indoor source Source: U.S. Environmental Protection Agency Can you give some examples?
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ENV 6130 Indoor aerosol 99 Source of indoor aerosol v Indoor source Tobacco combustion Cooking Biological contaminants: mold, dust mite Plants, pets: pollen, spores, bacteria Building material, especially mineral fibers, asbestos Combustion appliances: wood stoves, fireplaces Residues from personal care and household cleaning Pesticides Radon decay products Activities Indoor chemistry
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