Abstracts
Résumé
Les vitesses de phototransformation de quatre hormones (estradiol, éthinylestradiol, progestérone, testostérone) et de deux anti-inflammatoires non stéroïdiens (diclofénac et naproxen) ont été étudiées en milieu aqueux dilué. Les expériences de photolyse ont été réalisées sous irradiation monochromatique (254 nm) et sous irradiation polychromatique (λ > 280 nm). Les résultats expérimentaux ont montré que les rendements quantiques de photodécomposition sont faibles (entre 0,02 et 0,08) à l’exception du diclofénac (de l’ordre de 0,30). L’influence de la concentration en oxygène dissous sur les rendements quantiques de photolyse a aussi été examinée. À partir des résultats obtenus, les rendements d’élimination des composés étudiés dans les conditions de désinfection des eaux par irradiation UV à 254 nm ont été estimés.
Mots clés:
- Estradiol,
- Ethinylestradiol,
- Progestérone,
- Testostérone,
- Diclofénac,
- Naproxen,
- Photolyse,
- Irradiation UV,
- Rendement quantique
Abstract
The photodecomposition of some emerging organic pollutants (4 hormones: estradiol, ethynylestradiol, progesterone, testosterone; and 2 nonsteroidal anti-inflammatory drugs: diclofenac and naproxen) has been investigated in dilute aqueous solution. The photolysis experiments were carried out under monochromatic irradiation (254 nm) and under polychromatic irradiation (λ > 280 nm). The calculated quantum yields of photodecomposition under monochromatic irradiations were low (between 0.02 and 0.08) except for diclofenac for which the value was about 0.30. The influence of oxygen concentration was also examined and the removal yields of these compounds under the conditions used for the UV-disinfection of drinking water at 254 nm were estimated.
Key words:
- Estradiol,
- Ethynylestradiol,
- Progesterone,
- Testosterone,
- Diclofenac,
- Naproxen,
- Photolysis,
- Ultraviolet Irradiation,
- Quantum yield
Appendices
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