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Air Quality Assessment in Populated Area, Houston
Focused on NOx & SO2
Eon S. Lee
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Order
• Outdoor Pollution Source
• Common Pollutants in Urban Area
• Population & NOx Distribution
• Annual NOx Concentration
• Annual SO2 Concentration
• Annual NOx & SO2 Concentration
• Conclusion
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Outdoor Pollution Source
Industrial Emission (NOx, SO2) Transportation (NOx, SO2)
Incomplete Combustion
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Common Pollutants in Urban Area
• A complex mixture including varying proportions of air, pollutants, humidity and allergens.
• Ozone, generated by reaction of NOx;NO2 +O2 NO +O3
• SO2, Acid rain, Toxic (not focused)
• Heat Island Effect• Occurs in the middle of Houston• 2.1 million people exposed.• Causes cancer and bronchial diseases
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Population & NOx Distribution
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NOx emission by year
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SO2 Emission by year
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Annual NOx & SO2 Concentration
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Conclusion• Overall NOx concentration is acceptable.• Less considered for SO2 concentration.• Necessary to make air quality standards
for consider building-concentrated area with large population/area ratio.
• Apply the heat island effect.• Personal protection.
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Any Question?