▎ 摘　　要

The pollution of agricultural wastewater by herbicides has become a major environmental challenge. To lessen the impact of this phenomenon, nanomagnetic graphene oxide was used as a novel adsorbent. This synthesized adsorbent was immobilized with a thermosensitive polymer (TSP) and modified with an organic dendrimer (methyl methacrylate and ethylenediamine). The use of this novel-synthesized substance for removing pollutants from an aqueous solution was studied. The composition and morphology of GO/Fe3O4 grafted with TSP and dendrimer (GO/Fe3O4/TSP/Den) were characterized by Fourier-transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, vibrating-sample magnetometer, and thermogravimetric analysis. Parameters such as solution pH, contact time, adsorption isotherm, and reusability were evaluated. The results indicated that GO/Fe3O4 /TSP/Den had efficient adsorption ability at a pH value of 5, a time period of 45 min, 1 mg L-1 concentration of the pollutant, a temperature of 37 degrees C, and a dose of 3 g L-1 of adsorbent. The adsorption capacity remained at 93.3% after 10 repetitions. The butachlor adsorption process follows pseudo-second-order kinetics equations and the Langmuir adsorption model. Moreover, the thermodynamic process was investigated for indicating the spontaneous and endothermic process of adsorption in nature. Eventually, the results demonstrated that GO/Fe3O4 /TSP/Den had an impressive adsorption capability to eliminate butachlor in wastewater and it can be quickly removed from water.