“…ABSTRACT: 17α-Ethinylestradiol (EE2) is a synthetic estrogen widely used in the treatment of several gynecological diseases, but it is resistant to chemical and biological degradation, which favors its accumulation in the environment, promoting ecotoxicological effects in several species. This work was carried out to evaluate the photodegradation of EE2 in an aqueous solution, containing pure tungsten trioxide (WO 3 ) and supported on SBA-15 mesoporous silica as Índice Remissivo Ferro 17,25,45,75,76,77,78,81,82,83,84,85 Filme fino de CeO2 (FFC) 35,37,40,42 Fisissorção 13,16,18 Fotoluminescente 44,47,49,50,52,55,57,58 G Gigoga 60,61,62,63,65,66,68,70,72 Google Classroom 1, 3…”