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Article Dans Une Revue Science of the Total Environment Année : 2010

Light induced degradation of testosterone in waters.

Résumé

The degradation of testosterone under simulated irradiations was studied in phosphate buffers and in natural waters at various excitation wavelengths. The quantum yield of photolysis was significantly lower at 313 nm (2.4 x 10(-3)) than at 254 nm (0.225). The formation of several photoproducts was observed, some of them being rapidly transformed in turn while others show higher stability towards subsequent irradiations. The nature of the main products was tentatively identified, both deduced from their spectral and spectrometric data and by comparison with synthesised standard compounds. Among the obtained photoproducts, the main one is possibly a spiro-compound, hydroxylated derivative of testosterone originating from the photohydratation of the enone group. The photodegradation pathway includes also photorearrangements. One of them leads to (1,5,10)-cyclopropyl-17beta-hydroxyandrostane-2-one. The pH of the water does not seem to affect the rate of phototransformation and the nature of the by-products.

Dates et versions

hal-00509278 , version 1 (11-08-2010)

Identifiants

Citer

Emmanuelle Vulliet, Marine Falletta, Pedro Marote, Thierry Lomberget, Jean-Olivier Païssé, et al.. Light induced degradation of testosterone in waters.. Science of the Total Environment, 2010, 408 (17), pp.3554-3559. ⟨10.1016/j.scitotenv.2010.05.002⟩. ⟨hal-00509278⟩
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