L-Aspartic acid (L-Asp) functionalized magnetite nanoparticles (Fe₃O₄ NPs) were synthesized through a facile co-precipitation method using L-Asp as a capping agent. UV–Vis, FTIR, XRD, SEM, EDS, TEM, and VSM techniques were used to investigate the formation, morphology, elemental composition, and magnetic properties of the synthesized Fe₃O₄ NPs. Highly crystalline and spherical shaped pure phase Fe₃O₄ NPs were successfully synthesized using amino acid as a capping agent. The magnetic measurement analysis confirms the superparamagnetic nature of the synthesized L-Asp capped Fe₃O₄ NPs. The adsorption efficiency of L-Asp capped Fe₃O₄ NPs was assessed by the removal of Rhodamine B (RhB). The optimum removal efficiency was found to be 7.7 mg g⁻¹ using 1 mg mL⁻¹ adsorbent, and 30 mg L⁻¹ RhB at pH 7 and 25 °C. The regression (R²_adj) and standard deviation (SD) analysis were used to validate both kinetic and isotherm models. Avrami fractional-order and Liu models were selected as the best kinetic and isotherms, respectively. The maximum adsorption capacity (Q_o) of L-Asp Fe₃O₄ NPs toward RhB Liu’s model was found to be 10.44 mg g⁻¹.

L-天冬氨酸（L-Asp）功能化的磁铁矿纳米颗粒（Fe ₃ O ₄ NPs）是通过使用L-Asp作为封端剂的简便共沉淀法合成的。使用紫外可见，傅立叶变换红外光谱（FTIR），X射线衍射（XRD），SEM，EDS，TEM和VSM技术研究合成的Fe ₃ O ₄ NP的形成，形态，元素组成和磁性。以氨基酸为封端剂成功合成了高结晶度和球形的纯相Fe ₃ O ₄ NP。磁测量分析证实了合成的L-Asp封端的Fe ₃ O ₄ NP的超顺磁性。L-Asp封端铁的吸附效率通过去除若丹明B（RhB）评估₃ O ₄ NP。使用1 mg mL ^-1吸附剂和30 mg L ^-1 RhB在pH 7和25°C下的最佳去除效率为7.7 mg g ^-1。回归分析（R ² _adj）和标准差分析（SD）用于验证动力学模型和等温线模型。Avrami分数阶模型和Liu模型分别被选为最佳动力学和等温线。发现L-Asp Fe ₃ O ₄ NPs对RhB Liu模型的最大吸附容量（Q _o）为10.44 mg g ^-1。