Influence de la source lumineuse et de la nature de l'eau sur l'élimination de la ciprofloxacine.

The aim of this work was to study the effect of the light source and the nature of water on the degradation of ciprofloxacin. Thus, the absorption spectrum and the photolysis of this molecule were respectively studied with a double beam spectrophotometer SAFAS 190 DES and a Waters 2695 high pressure liquid chromatograph. Ciprofloxacin has an absorption band of between 200 nm and 400 nm with maximum absorption peaks at 275 nm and 322 nm. The direct photolysis of ciprofloxacin carried out under the exposure of monochromatic (λ = 253.7 nm) and polychromatic (λ> 285 nm) lamps in distilled water, tap and lagoon showed the degradation of this molecule. Ciprofloxacin degrades faster under the monochromatic lamp (Kapp between 0.542.10-3 and 1.667.10-3) than under the polychromatic lamp (Kapp between 0.313.10-3 and 0.576.10-3) which simulates solar radiation. Depending on the nature of the light source, degradation of ciprofloxacin is greater in tap water (Kapp = 1.667.10-3 under LM and 0.576.10-3 under LP) than in distilled water (Kapp = 0.715.10- 3 under LM and 0.313.10-3 under LP) and in lagoon water (Kapp = 0.542.10-3 under LM and 0.319.10-3 under LP). [ABSTRACT FROM AUTHOR]