摘要：The adverse health effects on the endocrine function of endocrine-disrupting chemicals (EDCs) have attracted worldwide attention. The present study reports the adsorption of EDCs from the perspective of choosing constructed wetland substrates to help achieve a high removal efficiency of EDCs. Batch studies were performed for the contact time, initial concentration, temperature and particle size of the substrates. The results demonstrated that the adsorption capacity (qe) increased with an increase in the temperature from 278 K to 308 K and a decrease in the substrate diameter from 75 to 590 μm. Along with the increase of initial concentration of estrone (E1) (from 100 μg/L to 2000 μg/L), qe increased, while the removal efficiency decreased. The equilibrium adsorption data were analyzed using two isotherm models (Langmuir and Freundlich) and three kinetic models (pseudo-first-order, pseudo-secondorder and intra-particle diffusion models). The Freundlich model provided a better fit to the data, and the pseudo-second-order kinetic model may be the best description of the adsorption process. The FTIR spectra of three substrates before and after adsorption of estrone revealed that the adsorption was physical. Based on these results, it can be concluded that ceramsite is an effective constructed wetland substrate for use in the removal of estrone.
