15.Photochem.oxidation.15 - Abiotic Reactions...

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Abiotic Reactions: Photochemistry/Oxidation Introduction to Environmental Transformations Photochemical Generation of Oxidants Oxidations Atmospheric Reactions Aquatic Reactions UV and Biological Surfaces Summary and Conclusions
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I. Introduction to Environmental Transformations Oxidation – loss of electrons or gain of oxygen bonds Reduction – gain of electrons or loss of oxygen bonds Hydrolysis – reaction with water (a nucleophile) Photolysis – transformation via sunlight Pyrolysis/pyrogenesis – transformation by combustion
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Brief Review Oxidation – reactions occur where oxidants are present (usually near the atmosphere) Reduction – reactions occur where reductants are present (usually away from atmospheric contact, such as in sediments) Like all transformation reactions, types that occur depend on functional groups and reactants present
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II. Photochemical Generation of Oxidants
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Influenced by Latitude, Season, Diur
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