▎ 摘　　要

The synthesis and investigation of reduced graphene oxide (Gr), graphene oxide (GO) and their magnetite composites (MGr and MGO), as sorbents for the adsorptive removal of estriol, was carried out. The nanosorbents were characterized and the factors that can affect the adsorption, such as pH, temperature and the presence of salts and humic acids were studied. The results showed that the adsorption capacities obtained from the Langmuir isotherms for Gr, GO, MGr and MGO were 200, 22, 23 and 33 mg g(-1) of sorbent, respectively, at 25 degrees C. The adsorption processes were dependent on the pH and on the presence of salts and humic acids, to certain degrees. The thermodynamic parameters indicate that the processes are spontaneous and exothermic in nature. The estriol adsorption mechanism was mainly attributed to pi- and hydrogen-bond interactions. Overall, the results demonstrated that all nanosorbents studied are efficient for the removal of estriol. In addition, a heterogeneous Fenton-like reaction catalyzed by MGO took place for the degradation of estriol. The effects of H2O2 concentration and catalyst amount on the degradation of estriol were investigated. A plausible mechanism for the degradation, which is completed in less than 2 h, was put forward. The heterogeneous Fenton reaction catalyzed by MGO is promising for estriol degradation as it leads to non-toxic products based on a zebrafish larvae toxicity study. [GRAPHICS]