Environmental Science 010 Air Academy for Lifelong Learning Environmental Science 010 Air Frank M Parker, III PE, DEE 12/31/2018 fparker3@calicheltd.com

Definitions Air: A mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere; Archaic. Breath;

Major Components

Respiratory System

Upper Respiratory System Nasal Passage

Bronchial Tree Alveoli

Lungs Pleura

Atmospheric Layers

Industrial Sources

Theoretical Dispersion

Smog

Dust Storm

Air Pollution Control Devices

Better AP Control Device

Sources of Carbon Monoxide [1999]

Hydrocarbon Sources [1999]

Nitrogen Oxides {NOX} [1999]

Particulates [1999]

Auto & Air Pollution

A Car commuting 18 miles roundtrip, 5 days/week & 48 weeks/year emmits: 4,500 lbs. of carbon dioxide (CO2) 160 pounds of carbon monoxide (CO) 16 lbs. of volatile organic compounds (VOCs) 16 lbs. of nitrogen oxide (NOx) Smaller amounts of benzene, formaldehyde, particulate matter and other toxic materials

Auto Catalytic Converters Definition: A substance that causes or speeds a chemical reaction without itself being affected; Catalysts inside catalytic converters are precious metals such as platinum, palladium, and rhodium coated on the surface of ceramic honeycomb structures.

Catalytic Converter

Chemical Reactions HC + O2 = H2O + CO2 CO + O2 = CO2 NOX = N2 + O2 SOX = S + O2 C(PM) + O2 = CO2

Ozone Definition: A form of oxygen, O3, produced when an electric spark or ultraviolet light passes through air or oxygen, that in the upper atmosphere absorbs ultraviolet rays, thereby preventing them from reaching the earth's surface, but that near the earth's surface is a harmful irritant and pollutant: used commercially for bleaching, oxidizing, etc.

Ozone Creation/ Depletion Solar Formation O2 + Sunlight = 2O O + O2 = O3 Solar Depletion O3 + Sunlight = O2 + O O + O3 = 2O2

Discussion