Graphene oxide (GO) nanosheets were immobilized and cross-linked by high-gluten flour (HGF), and a series of biomass-GO composites with various HGF-to-GO mass ratios were fabricated through a one-step hydrothermal method. The HGF-GO composites were used as novel adsorbents to adsorb rare earth ions (REE³⁺: La³⁺, Yb³⁺, Y³⁺, Er³⁺ and Nd³⁺) from aqueous solutions, and their adsorption properties were also investigated detailly. To evaluate the physicochemical properties of HGF-GO composites and further understand the mechanisms of adsorption of REE³⁺ onto HGF-GO composites, the HGF-GO composites were characterized by scanning electron microscopy (SEM), thermal gravimetric analyzer (TGA), Raman spectroscopy and Fourier transform infrared (FT-IR) spectroscopy. Several important condition parameters including contact time, initial REE³⁺concentrations, solution pH values and temperature that might affect the adsorption process were studied in detail. The maximum adsorption capacities of HGF-GO_1:1 composite toward La³⁺, Yb³⁺, Y³⁺, Er³⁺ and Nd³⁺ were 30.32, 36.64, 32.84, 42.36 and 48.68 mg g⁻¹, respectively. The experimental data indicated that the adsorption of REE³⁺ onto HGF-GO_1:1 was well fitted by the pseudo-second order kinetic model and the Langmuir isotherm model, and the adsorption process was a spontaneous and endothermic reaction. The HGF-GO_1:1 composite could be well regenerated and reused after five adsorption-desorption cycles, and its removal efficiency for Yb³⁺ remained as a constant of 100%.

通过高筋面粉（HGF）固定并交联氧化石墨烯（GO）纳米片，并通过一步水热法制备了具有不同HGF / GO质量比的一系列生物质-GO复合材料。将HGF-GO复合材料作为新型吸附剂从水溶液中吸附稀土离子（REE ³⁺：La ³⁺，Yb ³⁺，Y ³⁺，Er ³⁺和Nd ³⁺），并且它们的吸附性能也很强。详细调查。评估HGF-GO复合材料的理化性质，并进一步了解REE ³⁺的吸附机理在HGF-GO复合材料上，通过扫描电子显微镜（SEM），热重分析仪（TGA），拉曼光谱和傅里叶变换红外（FT-IR）光谱对HGF-GO复合材料进行了表征。详细研究了可能影响吸附过程的几个重要条件参数，包括接触时间，初始REE ³⁺浓度，溶液pH值和温度。HGF-GO _1：1复合材料对La ³⁺，Yb ³⁺，Y ³⁺，Er ³⁺和Nd ³⁺的最大吸附容量分别为30.32、36.64、32.84、42.36和48.68 mg g ^-1。实验数据表明REE ³⁺的吸附拟二阶动力学模型和Langmuir等温模型很好地拟合了HGF-GO _1：1上的吸附，吸附过程为自发吸热反应。在五个吸附-解吸循环后，HGF-GO _1：1复合材料可以很好地再生和再利用，其对Yb ^3+的去除效率保持恒定为100％。