Contribution à l’étude de la désinfection de l’eau par photosensibilisation avec des extraits de plantes

摘要： Some plants used in the traditional pharmacopoeia to treat microbial and parasitic infections are able to generate singlet oxygen. This is used to disinfect the water. The study of the disinfection of water by photosensitization with the flavonoid extracts of Aframomum alboviolaceum shows a complete inhibition of fecal coliforms present in the water after one hour of sunshine for the two isolated products by column chromatography of the roots of this plant. Regarding the water samples treated with these two products and kept in the dark, no inhibition was noted from the beginning to the end of the experiments. This suggests that these products are photosensitizers and that in the presence of the sun they undergo photoexcitation which would lead to the formation of singlet oxygen. The latter, once generated, destroys the fecal coliforms present in water.