▎ 摘　　要

In this work, we report a straightforward synthesis of magnetic graphene oxide (GO.Fe3O4) in very mild conditions. This methodology proved to be effective in obtain graphene oxide (GO) decorated with different amounts of incorporated magnetite. The characterizations reveal the presence of magnetic nanoparticles (MNPs) in analyzed nanomaterial. Despite several methods shown in the literature, this protocol enables the amount control of incorporated magnetite on the surface of GO. Experimental data shows that GO.Fe3O4 1:10 (mass:mass) demonstrates the highest adsorption capacity on the hydrochlorothiazide with a 67.86% removal of the contaminant and pH 7.0 as the favorable condition. The removal rate and adsorption capacity are dependent on the initial concentration of the HCTZ, amount and type of the adsorbent. Temperature, ionic strength, and solution pH in the adsorption were also studied. The pseudo-second-order and Freundlich models showed better adjustment of the experiment. Thermodynamic parameters indicated that the adsorption process is exothermic and occurred spontaneously. Magnetic nanoadsorbent proves to be an efficient alternative nanomaterial for removing hydrochlorothiazide from aqueous solutions, avoiding filtration and centrifugation steps.