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Environmental fate & pathways

Phototransformation in water

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Description of key information

Half-lifes for indirect photodegradation in water range from 39.6 days to 3301 days, depending on the local conditions.

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Additional information

Adams et al. (1965), cited by Anbar et al. (1967) measured a rate constant for the reaction of 3 -pentanone with Oh radicals as sensitizer in water of 8.1E+08 L/mol*sec. Calculating half lifes with a "best case" OH concentration at summer noon near the water surface of 2.5E-16 mol/L and an average concentration over the whole water column (14 m) of 3.0E-18 mol/L according to measured data from Zepp et al (1987) in swiss lake Greifensee results in half lifes of 39.6 days and 3301 days, respectively.