INDOOR AIRPOLLUTIONSources andHealth EffectsJanine Bernadette A.PontanarBS Chemistry IV
Air pollution is the introduction ofchemicals, particulate matter, or biologicalmaterial that cause harm discomfort tohumans or other living organisms, ordamages the natural environment; intothe atmosphere.What do you mean by INDOOR AIRPOLLUTION?
It refers to the physical, chemical, andbiological characteristics of air in theindoor environment within a home,building, or an institution or commercialfacility.
What are the SOURCES of indoorair pollution?
COMBUSTION OF GASESFROM FIREPLACES AND WOODBURNING STOVES
NITROGEN DIOXIDESources:un-vented gas stoves and heatersEnvironmental tobacco smokeKerosene heaters
NITROGEN DIOXIDEHealth effects:NO2 acts mainly as an irritant affecting themucosa of the eyes, nose, throat, andrespiratory tract. Extremely high-doseexposure (as in a building fire) to NO2may result in pulmonary edema anddiffuse lung injury. Continued exposure tohigh NO2 levels can contribute to thedevelopment of acute or chronicbronchitis.
NITROGEN DIOXIDE• Low level NO2 exposure may cause increased bronchial reactivity in some asthmatics, decreased lung function in patients with chronic obstructive pulmonary disease and increased risk of respiratory infections, especially in young children. Death generally results within 2- 10 days after exposure to 500 ppm or more of NO2.
ASBESTOSSources: Buildings Fireplace gloves Certain hair dryers Pipes
Figure 1.3 Asbestos
ASBESTOSHealth effects: asbestosis, a scarring of the lungs that leads to breathing problems and heart failure. lung cancer Mesothelioma Asbestos may also be linked to cancer of the stomach, intestines, and rectum
Closed Vermiculite mine in Libby, Montanawhere 192 deaths and 375 lung injuriesdue asbestos were reported.
RADONRadon is radioactive but chemicallyunreactive colorless, tasteless, odorlessgas produced by radioactive decay ofuranium. Its decay products, called radonprogeny, are electrically charged and canbe inhaled or attach to particles that areinhaled. Radon itself is not harmful, but itsprogeny, particularly polonium and lead,are highly carcinogenic.
1898 Ernest Rutherford found out thatBecquerel’s uranium emitted alphaand beta particles.
According to the survey of NationalHuman Activity Pattern Survey(NHAPS), adults and children stayindoor 89% of all the time, 6% outdoor,and 5% in the car.
Comparison of Personal, Indoor, andOutdoor Air pollution
RULE OF A THOUSAND“A pollutant released indoors is about1000 times more likely to be inhaledthan that same amount releasedoutdoors.”-Nazaroff, 2000
How to avoid air pollution?Proper VENTILATIONProper construction of buildingsGreen Chemistry