Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
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The important catalysts for stratospheric<br />
O 3 destruction<br />
• Hydroxy radical (OH)<br />
. .<br />
OH + O3 = HO2 + O2<br />
HO 2<br />
. + O = . OH + O2<br />
Net: O + O 3 = 2O 2<br />
• Chlorine and bromine (Cl and Br)<br />
Cl . + O 3 = ClO . + O 2<br />
ClO . + O = Cl . + O 2<br />
Net: O + O 3 = 2O 2<br />
• Nitric oxide (NO)<br />
NO + O 3 = NO 2 + O 2<br />
NO 2 + O = NO + O 2<br />
Net: O + O 3 = 2 O 2<br />
HOx cycle<br />
ClOx cycle<br />
NOx cycle
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