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Sources and Effects of Ozone

Learn about the origins, impacts, and dangers of ozone at different levels, from the stratosphere to ground level, including VOCs and nitrogen oxides. Discover how these pollutants affect health, the environment, and everyday life.

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Sources and Effects of Ozone

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  1. Sources and Effects of Ozone

  2. Stratospheric Ozone • Formed by UV rays from the sun breaking 02 molecules apart creating free radicals • The free radicals combine with other O2 molecules to form O3

  3. Effects of Ultra Violet Radiation • Include • Mutation • Effects on health (cancer) • Damage to photosynthetic organisms • Phytoplankton • Zooplankyton

  4. Tropospheric Ozone(Ground Level Ozone) • Formed as a by-product of photochemical smog • Sometimes results from stratospheric ozone moving into troposphere (intrusion)

  5. Tropospheric Ozone • Eye and respiratory irritation • Decreased agricultural yields • Slows plant growth • Deteriorates plastics and rubber • “Sharp” odor

  6. Volatile Organic Compounds(VOC’s) • Evaporation of fuels and solvents • Incomplete combustion of fossil fuels • Naturally occurring compounds like monoterpenes and sesquiterpenes from trees

  7. Volatile Organic Compounds • Respiratory and eye irritation • Some are carcinogenic • Decreased visibility due to blue-brown haze (Blue Ridge Mountains)

  8. Nitrogen Oxides • Commonly called NOx as there are many possible combinations such as NO, and NO2, N2O2 etc.

  9. Nitrogen Oxides • Combustion of fossil fuels eg. Oil, coal, gas in both automobiles and industry • Bacterial action in soil (Nitrogen Cycle) • Forest fires • Volcanic action • Lightening

  10. Nitrogen Oxides • Decrease visibility due to yellowish color of NO2 • NO2 contributes to heart and lung problems • Decreased immune response • May increase risk of cancer

  11. Peroxyacetyl Nitrates (PAN’s) • Formed by the reaction of NO2 with VOCs (can be formed naturally n some environments)

  12. Peroxyacetyl Nitrates • Eyes, nose and throat irritation • High toxicity to plants • Respiratory irritation • Damage to proteins

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