Acid rain - Artigianelli
Transcript of Acid rain - Artigianelli
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Acid rain
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What is acid rain?• precipitation that has a pH < 5
- normal pH is 5.6 - acid rain pH is between 5 and 3 - typically around 4.2 - 4.4
value that measures several properties of the solutions, one of which is corrosivity
pHmeter universal indicator
paper
dry deposition
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Acid rain dynamics• 1) production of pollutants
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Acid rain dynamics• 1) production of pollutants
NOx
SO2
nitrogen oxides
sulfur dioxide
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Acid rain dynamics• 1) production of pollutants
NOx
SO2
nitrogen oxides
sulfur dioxide
fossil fuelsvolcanoes
anthropization
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Acid rain dynamics• 2) pollutants rise into the atmosphere
• 3) precipitation
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Acid rain dynamics• 2) pollutants rise into the atmosphere
• 3) precipitation
if the gases combine with vapour we will have acid fog, rain, snow
if the gases DO NOT combine with vapour we will have a dry deposition
when the dry deposition is wetted by moisture or rain it ACTIVATES into acid!
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Acid rain dynamics• 4) acids precipitate and damage natural and cultural
heritage
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