▎ 摘　　要

In this research, graphene oxide (GO) was thermally reduced and chemically bonded on the surface of amino-functionalized sand particles (AFSPs) simultaneously and used as an adsorbent for naphthalene and acenaphthene adsorption from aquatic environments. The produced nanocomposite was characterized by Raman spectroscopy, FESEM, TEM, XRD, BET, and FTIR analysis. The batch experiments were designed using central composite design (CCD) to investigate the impacts of the initial concentration of adsorbates, total dissolved solid (TDS) concentration, contact time, and adsorbent dose on the adsorption process. Analysis of equilibrium results depicted that the experimental data were fitted to the Langmuir, Redlich-Peterson, and Dubinin-Radushkevich models for naphthalene, and Redlich-Peterson and Freundlich models for acenaphthene adsorption. Kinetic studies were conducted, and the results showed that the adsorption of both adsorbates followed the pseudosecond-order and intra-particle diffusion models. The pseudo-second-order rate constant of acenaphthene was lower than that of naphthalene, and the rate constant of the intra-particle diffusion model for acenaphthene was higher than that of naphthalene, which was the result of higher water solubility of naphthalene. The continuous studies were performed to examine the practical use of the adsorbent in the fixed-bed water treatment process. The performance of the minicolumn was assessed by Thomas and Adams-Bohart models. Considering the error functions and comparison between simulated and experimental breakthrough curves, the Thomas model was reported as the best model for predicting experimental data of both adsorbates.