Streams become more acidic and removes minerals from the rocks. Water contains more Pb , Cu, and Hg (heavy metals) Kills aquatic life Damages bridges Contaminates drinking water. Acid Mine Drainage (AMD). Pyrite fool’s gold. 4 FeS 2 + 15 O 2 + 14 H 2 O 4 Fe(OH) 3 + 8 H 2 SO 4.
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Streams become more acidic and removes minerals from the rocks.
Water contains more Pb, Cu, and Hg
Kills aquatic life
Contaminates drinking water
Acid Mine Drainage (AMD)
4 FeS2 + 15 O2 + 14 H2O 4 Fe(OH)3 + 8 H2SO4
“yellow boy” (iron hydroxide) yellow-orange solid
Pyrite (iron sulfide)
Reacts with limestone and marble
Damages buildings and works of art
A mixture of wet and dry deposition (deposited material) from the atmosphere containing higher than normal amounts of nitric and sulfuric acids.
Wet Deposition – acidic rain, fog and snow.
Dry Deposition - acid chemicals incorporated into dust or smoke.
Acid Rain (refer to handout)
Accumulates in soil, lakes and streams
Kills plants – damage of trees at high elevations
Accelerates the decay of building materials, paints, statues
Acid Rain Effects
On pH scale
US typical reading is 4.3 (5.6 is typical atmosphere conditions)
How Acid Rain is Measured?
1. Clean –up smokestacks and exhaust pipes
“scrubbers”- chemically remove SO2
2. Use alternative energy sources
wind, solar, geothermal, natural gas
3. Restore a damaged environment
add limestone or lime to acidic lakes
Acid Rain reduction