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Danijela Prokić,Marija Vukčević,Ana Kalijadis,Marina Maletić,Biljana Babić,Tatjana Đurkić 한국섬유공학회 2020 Fibers and polymers Vol.21 No.10
This paper explores the applicability of unmodified and chemically modified activated carbon cloths (ACCs) forthe removal of estrone, 17β-estradiol, and 17α-ethinylestradiol from water. In order to examine the influence of surfaceproperties on hormone adsorption, chemical modification of ACCs with HNO3, HCl, or KOH was employed. Appliedtreatments increased the specific surface area and changed the content of oxygen functional groups. Increased content ofacidic surface oxygen functionalities enhanced adsorption efficiency up to 30 % and had a more dominant influence onadsorption capacity than specific surface area. Adsorption of estrone, 17β-estradiol, and 17α-ethinylestradiol followedpseudo-second-order kinetic model, while the equilibrium adsorption data fitted well with the Freundlich isotherm model. Calculated mean sorption energy values of 1.4475, 1.3387, and 1.0541 kJ/mol, for E1, E2, and EE2 respectively, indicatedthat removal of selected hormones was dominated by physisorption mechanism. Obtained Langmuir adsorption capacities,12.34, 12.66, and 11.11 mg/g for estrone, 17β-estradiol, and 17α-ethinylestradiol, respectively, as well as convenience ofmanipulation, recommend activated carbon cloth modified with HNO3 as an efficient adsorbent for removing estrogenhormones from the water.