Keywords: استروئید استروژن; Mesoporous silica; Organic modification; Steroid estrogen; Adsorption; Hydrophobicity; E1; Estrone; E2; 17β-estradiol; EE2; 17α-ethinyl estradiol; EDCs; Endocrine disrupting chemicals; STWs; Sewage treatment works; CTAB; Cetyltrimethylammonium bromide;